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WO2017037793A1 - Power supply device - Google Patents

Power supply device Download PDF

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Publication number
WO2017037793A1
WO2017037793A1 PCT/JP2015/074496 JP2015074496W WO2017037793A1 WO 2017037793 A1 WO2017037793 A1 WO 2017037793A1 JP 2015074496 W JP2015074496 W JP 2015074496W WO 2017037793 A1 WO2017037793 A1 WO 2017037793A1
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WO
WIPO (PCT)
Prior art keywords
power generation
vibration
frequency
power
power supply
Prior art date
Application number
PCT/JP2015/074496
Other languages
French (fr)
Japanese (ja)
Inventor
直毅 吉武
達章 正木
進 神山
Original Assignee
オムロン株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by オムロン株式会社 filed Critical オムロン株式会社
Priority to PCT/JP2015/074496 priority Critical patent/WO2017037793A1/en
Publication of WO2017037793A1 publication Critical patent/WO2017037793A1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H02J1/10—Parallel operation of dc sources
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N1/00—Electrostatic generators or motors using a solid moving electrostatic charge carrier

Definitions

  • the present invention relates to a power supply device using a vibration power generation element that generates power by external vibration.
  • a technique for determining the abnormal state based on the vibration state of the monitoring target device obtained using the vibration power generation element is also disclosed (see, for example, Patent Document 1).
  • predetermined wireless transmission is performed to the information processing device side using the power generated by the vibration power generation element, and the abnormal state of the monitored device is determined based on the reception interval by the information processing device. Is called.
  • a vibration power generation element that converts vibration energy into electric power can generate power based on vibrations of motors and the like that are often used in factories and the like.
  • the amount of power generated by such a vibration power generation element generally depends on the amplitude and frequency of external vibration, and it is not always possible to generate a sufficient amount as compared with the power consumption at the load. .
  • using a wireless device to determine an abnormality of a monitored device can eliminate wiring in the system construction for the abnormality determination, and is extremely useful in terms of maintenance and cost. is there.
  • wireless transmission for abnormality determination using the generated power of the vibration power generation element on the monitoring target device side having the vibration power generation element, it is not caused by the abnormality of the monitoring target device. If sufficient vibration power generation due to external vibration cannot be performed, abnormality monitoring and wireless transmission that should be originally performed are not performed, and an erroneous abnormality determination may be made regarding the monitoring target device.
  • the present invention has been made in view of the above problems, and in a power supply device using a vibration power generation element that generates power by external vibration, the efficiency of vibration power generation by external vibration is improved and the amount of power to a power supply target The purpose is to increase as much as possible.
  • the present invention is a power supply device that outputs the generated power from the power generation unit to a power supply target via the control unit, and the power generation unit is at least an external device from the outside of the power supply device.
  • a plurality of DC power generation units comprising a combination of a vibration power generation element that performs vibration power generation by vibration and a rectifier circuit that rectifies the output of the vibration power generation element; and the plurality of DC power generation units are connected to the control unit.
  • Unit output power connected in parallel and passing through the rectifier circuit in each DC power generation unit is input to the control unit in parallel.
  • the power supply apparatus includes a plurality of DC power generation units each formed by a combination of a vibration power generation element that performs vibration power generation by external vibration and a rectifier circuit that rectifies the output thereof.
  • the power generation capability of each vibration power generation element in the plurality of sets of DC power generation units for example, the ratio of the generated power to the vibration energy of the external vibration to be applied may all be the same. Alternatively, some vibration power generation The power generation capacity of the element may be different from the power generation capacity of other vibration power generation elements.
  • the unit output power which is the DC output of the DC power generation unit including the vibration power generation element, is parallel to the control unit that controls the supply of the generated power by the power supply device to the power supply target. The input configuration is adopted.
  • the control unit superimposes the unit output power from each DC power generation unit to generate the generated power, and can increase the power generation capability as a power supply device. Further, since the plurality of unit output powers to be superimposed are DC power, the generated power can be increased without canceling the waveforms as in the case of AC power. Moreover, as a power supply device, each DC power generation unit is controlled by a common control unit. That is, since the power consumed by the control unit for the output of generated power is shared by each DC power generation unit, the ratio of power loss due to the power consumption of the control unit in one DC power generation unit is reduced, and as a result As a power supply device, it is possible to realize power supply with high power generation efficiency.
  • the number of DC power generation units included in the power supply device according to the present invention is not particularly limited.
  • the number of DC power generation units is determined to such an extent that the power required for the power supply target can be covered.
  • the configuration of the vibration power generation element is not limited to a specific configuration.
  • each of the vibration power generation elements included in the plurality of DC power generation units has a peak value of the generated power of the vibration power generation element when the frequency of the external vibration is a predetermined frequency. It may be formed as follows. In other words, each vibration power generation element is configured to have a resonance frequency with respect to the external vibration. Therefore, when the external vibration is a vibration having a lot of resonance frequency components, the resonance The vibration power generation element corresponding to the frequency can realize more efficient vibration power generation.
  • the plurality of DC power generation units may include at least two types of vibration power generation elements having different predetermined frequencies.
  • the predetermined frequencies of the vibration power generation elements included in the plurality of DC power generation units are not necessarily different from each other.
  • the predetermined frequency of the first vibration power generation element group including one or a plurality of vibration power generation elements may be different from the predetermined frequency of the second vibration power generation element group including other vibration power generation elements.
  • another vibration power generation element group corresponding to a different predetermined frequency may be formed.
  • the first frequency is the vibration power generation corresponding to the second frequency with respect to the second frequency.
  • the transition of the amount of power generation with respect to the vibration frequency by the first power generation element that is a deviation from the half-value width of the transition of the power generation amount with respect to the vibration frequency by the second power generation element that is the element and that corresponds to the first frequency
  • the first frequency and the second frequency may be set so that the transition related to the second power generation element overlaps with each other.
  • the vibration frequency of the external vibration is changed in the transition of the power generation amount with respect to the vibration frequency of the external vibration in the power supply device. Even if it changes, the area
  • the first frequency and the second frequency are set with a deviation equal to or greater than the half width, and the output generated by the first power generation element is rectified by the corresponding rectifier circuit, and the power generation by the second power generation element.
  • the transition of the power supply device is formed by superimposing the output rectified by the corresponding rectifier circuit.
  • the first frequency and the second frequency are set such that the first frequency is deviated from the second frequency by the half-value width of the transition with respect to the second power generation element.
  • the first frequency and the second frequency are set as another method.
  • Each of the frequencies may be a multiple of 50 Hz and 60 Hz.
  • the power supply device according to the present invention realizes power supply to a power supply target using external vibration caused by either 50 Hz or 60 Hz, which is the frequency of the commercial power supply. Can do.
  • each of the plurality of DC power generation units has a backflow prohibition circuit that prohibits a backflow in which a current flows into the rectification circuit side between the rectification circuit and the control unit. May be.
  • a plurality of DC power generation units are connected in parallel to the control unit. And even if the vibration power generation element included in each DC power generation unit is performing vibration power generation by external vibration, not all vibration power generation elements necessarily output the same power generation amount. A potential difference is generated on the output terminal of the DC power generation unit. Therefore, if a backflow to the rectifier circuit side occurs due to the potential difference, as a result, the generated power as the power supply device decreases. Therefore, by providing the backflow prohibition circuit for prohibiting the backflow as described above between the rectifier circuit of each DC power generation unit and the control unit, it is possible to suppress a decrease in the generated power of the power supply device.
  • the control unit may include a secondary battery that stores the generated power from the plurality of DC power generation units.
  • the control unit can appropriately control the supply timing of the generated power to the power supply target by storing the generated power from each DC power generation unit in the secondary battery.
  • the plurality of DC power generation units may be disposed on the flexible substrate.
  • some DC power generation units among the plurality of DC power generation units are arranged on one surface of one flexible substrate, and the remaining DC power generation units among the plurality of DC power generation units
  • the DC power generation unit may be disposed on the other surface of the flexible substrate. In this way, by arranging the DC power generation units on the respective surfaces with the flexible substrate interposed therebetween, a part of the DC power generation units and the remaining DC power generation units can be arranged at different positions. As a result, it is possible to form an environment in which external vibration is appropriately applied to each of some of the DC power generation units and the remaining DC power generation units, thereby realizing more efficient vibration power generation. .
  • FIG. 1 shows a configuration of an electret group 1a and an electrode group 5a provided on each of a movable member 1 and a fixed member 5 in a vibration power generation element 10 that performs vibration power generation by external vibration.
  • the electret and the electrode are arranged in a direction in which the relative movement direction of the movable member 1 with respect to the fixed member 5 is the X direction, and the directions in which the movable member 1 and the fixed member are opposed are the Z direction, the X direction, and The direction orthogonal to the Z direction is defined as the Y direction.
  • FIG. 1 is a cross-sectional view of the vibration power generation element 10 taken along the ZX plane.
  • the movable member 1 and the fixed member 5 are housed in a housing 11 shown in FIG.
  • the movable member 1 and the fixed member 5 are configured to be relatively movable while maintaining a state of facing each other, and a support structure of the movable member 1 that enables the relative movement will be described later.
  • the fixing member 5 is fixed to the housing 11.
  • both ends of the movable member 1 are respectively connected to the housing 11 by springs 14 (see FIG. 2 and the like), the movable member 1 itself is a fixed member fixed to the casing 11 by external vibration. 5 is configured to reciprocate (vibrate) relative to the other.
  • the movable member 1 and the fixed member 5 are configured to be relatively movable while being opposed to each other and maintaining a parallel state to each other, that is, maintaining a constant interval between the opposing surfaces. ing. Thereby, it becomes possible to generate an electrical signal for the pair of electrodes 6 and 7 on the fixed member 5 side by the action of the electret 2 on the movable member 1 side. Since this electric signal generation principle is a conventional technique, a detailed description thereof is omitted in this specification.
  • an electret group 1a is formed on a movable substrate 1b.
  • the electret group 1a includes a plurality of electrets 2 provided on the surface of the movable member 1 facing the fixed member 5 and formed on a conductor, respectively, and a plurality of guard electrodes 4 that are not grounded.
  • the electrets 2 and the guard electrodes 4 are arranged alternately along the relative movement direction (X direction) of the movable member 1 with respect to the fixed member 5.
  • the plurality of electrets 2 and the plurality of guard electrodes 4 are each formed in a comb shape, and the respective electrets 2 and the respective guard electrodes 4 are arranged in a nested manner.
  • FIG. 1 is a ZX sectional view. Therefore, the electret 2 and the guard electrode 4 are illustrated as being alternately arranged.
  • the electret 2 is configured to hold a negative charge semipermanently.
  • the guard electrode 4 employs a configuration in which the guard electrode 4 is not grounded as described above, but may be configured to be grounded instead.
  • an electrode group 5a is formed on a fixed substrate 5b.
  • the electrode group 5a is provided on the surface of the fixed member 5 facing the movable member 1, and includes a plurality of small electrode groups each including a pair of electrodes (first electrode 6 and second electrode 7).
  • the relative position fluctuation (vibration) between the electrodes 6 and 7 due to the relative position fluctuation of the movable member 1 having the electret 2 with respect to the fixed member 5 due to external vibration. ) Is generated and power is generated.
  • the generated power is rectified by the rectifier circuit 20.
  • FIG. 2 is a top view (top view in the XY plane) of the vibration power generation element 10, and FIG. 3 is a cross-sectional view along AA in FIG. 2 (cross-sectional view in the ZY plane).
  • FIG. 2 shows a state in which the upper surface 11c of the housing 11 is removed and the inside is visualized from above.
  • the fixed member 5 including the electrode group 5 a and the fixed substrate 5 b and the movable member 1 including the electret group 1 a and the movable substrate 1 b are accommodated in the casing 11 of the vibration power generation element 10. .
  • the casing 11 has a substantially rectangular parallelepiped shape, and includes a top surface 11c and a bottom surface 11b, a pair of side surfaces 11a extending in the X direction that is the relative movement direction of the movable member 1, and a side surface orthogonal to the relative movement direction. And has a pair of side surfaces 11d extending in the Y direction.
  • the fixing member 5 is being fixed to the bottom face 11b of the housing
  • the movable member 1 is supported so as to be able to move relative to the fixed member 5 via a plurality of supporting steel balls 12.
  • the movable member 1 is further arranged on the plurality of supporting steel balls 12 arranged on the inner wall surface of the bottom surface 11b.
  • the distance between the electret group 1a on the movable member 1 side and the electrode group 5a of the fixed member 5 is a predetermined value suitable for vibration power generation. Stipulated in distance.
  • a further supporting steel ball 13 is disposed between the movable member 1 and the inner wall surface of the side surface 11a.
  • End side projections 1d are provided at both ends of the side surface of the movable substrate 1b facing the inner wall surface of the side surface 11a, and a central projection 1c is provided at the center of the side surface of the movable substrate 1b.
  • a support groove 1e in which the support steel ball 13 can be disposed is formed. Therefore, as shown in FIG. 2, two support grooves 1 e are formed on each of the left and right sides of the movable member 1, and the support steel balls 13 are disposed in each.
  • a spring 14 is disposed between the movable member 1 and each of the two side surfaces 11d of the housing 11 via a connection portion 15 provided substantially at the center in the XY plane of the movable member 1.
  • the spring 14 is connected to a substantially central portion of the side surface 11 d, and the elastic force by each spring 14 is arranged to act in the relative movement direction (X direction). Due to the elastic force of the spring 14, the movable member 1 that has received external vibration reciprocates within the housing 11, thereby realizing efficient vibration power generation.
  • the movable member 1 is independently supported by the support steel ball 12 for the bottom surface 11b and by the support steel ball 13 for the side surface 11a.
  • a resonance phenomenon occurs in which the amplitude of the movable member 1 with respect to the fixed member 5 becomes maximum when the frequency of the external vibration is a predetermined frequency due to its physical characteristics.
  • the amplitude of the movable member 1 is maximized, the number of electrodes that the electret on the movable member 1 side crosses per unit time increases, and thus the power generation amount of the vibration power generation element 10 increases.
  • the resonance frequency of the movable member 1 in the vibration power generation element 10 approaches or coincides with the frequency of external vibration as much as possible. It is preferable to do this.
  • the resonance frequency of the vibration power generation element 10 can be set to a desired frequency by adjusting the weight of the movable member 1 and the spring constant of the spring 14.
  • FIG.4 shows a schematic configuration of the power supply device 60 and the sensor module 70
  • FIG. 5 shows a circuit configuration corresponding to the power supply device 60 shown in FIG.
  • the sensor module 70 includes a power supply device 60 and a load 50 that operates by receiving power supply from the power supply device. This load 50 corresponds to a power supply target in the present invention.
  • the power supply device 60 includes a plurality of sets (four sets in this embodiment) of the DC power generation unit 30 including the vibration power generation element 10, the rectification / smoothing circuit 20, and the backflow prohibition circuit 21.
  • the reference number thereof is 30.
  • subscripts (a to d) corresponding to the respective DC power generation units are used. Reference is made to FIG. The same applies to the reference numerals of the vibration power generation element 10, the rectification / smoothing circuit 20, and the backflow prohibition circuit 21 included in the DC power generation unit 30.
  • the generated power of the vibration power generation element 10 due to external vibration is AC power from the configuration of the vibration power generation element 10 shown in FIG. Therefore, in order to convert the generated power into DC power, the generated power is passed through the rectifying / smoothing circuit 20.
  • the rectification / smoothing circuit 20a of the DC power generation unit 30a is formed by a full bridge circuit including four diodes D1 to D4 and a capacitor C1, and the rectification / smoothing circuit of the DC power generation unit 30b.
  • the rectifying / smoothing circuit 20d of the power generation unit 30d is formed by a full bridge circuit including four diodes D13 to D16 and a capacitor C4.
  • the generated power that has passed through the rectification / smoothing circuit 20 becomes the output of the DC power generation unit 30 through the backflow prohibition circuit 21.
  • the backflow prohibiting circuit 21a of the DC power generation unit 30a is formed by a diode DA1
  • the backflow prohibiting circuit 21b of the DC power generation unit 30b is formed by a diode DA2
  • the backflow of the DC power generation unit 30c is formed of a diode DA3
  • the reverse current prohibition circuit 21d of the DC power generation unit 30d is formed of a diode DA4.
  • these four sets of DC power generation units 30 are connected to the control unit 40 in parallel. That is, when external vibration is applied to the sensor module 70 including the power supply device 60, vibration power generation is performed by the vibration power generation element 10 in each DC power generation unit 30, and the generated power is rectified and smoothed by the rectifying / smoothing circuit 20, backflow.
  • the electric power of each DC power generation unit 30 and the control unit 40 so that the power (corresponding to the unit output power in the present invention) that is output from the DC power generation unit 30 through the prohibition circuit 21 is input to the control unit 40 in an overlapping manner. A proper connection relationship is set.
  • the control unit 40 is a functional unit for controlling the power supply of the power supply device 60, that is, the supply of the generated power by each vibration power generation element 10 to the load 50, specifically, a predetermined power control circuit 41. Or a microcomputer (not shown).
  • the control unit 40 includes a secondary battery 42, and stores the unit output power from each DC power generation unit 30 in the secondary battery 42, or loads the power stored in the secondary battery 42 with a load 50. The control relating to the storage / discharge to be performed is performed.
  • the load 50 is driven by the power supplied from the power supply device 60 as described above, and specifically includes the wireless communication device 51 and the acceleration sensor 52.
  • the acceleration sensor 52 is a sensor that detects the acceleration generated in the measurement object on which the sensor module 70 is disposed, and the detection data is transmitted to the reception device outside the sensor module by the wireless communication device 51.
  • the power supply device 60 performs vibration power generation by external vibration, so that the acceleration of the measurement object on which the sensor module 70 is disposed can be obtained without receiving power supply from the outside of the sensor module. Data transmission for detection and collection of the detection data is realized.
  • the acceleration sensor 52 is exemplified as the sensor included in the sensor module 70.
  • the present invention is not limited to the acceleration sensor, and other sensors, for example, according to the purpose of data collection, for example, A pressure sensor or a temperature sensor may be mounted on the sensor module 70 together with the acceleration sensor 52 or instead of the acceleration sensor 52.
  • FIG. 6 shows the transition of the power generation amount by the power supply device 60 with respect to the vibration frequency of the external vibration (hereinafter referred to as “power generation transition”).
  • the power generation amount transition shown in FIG. 6 is for the case where the acceleration of the external vibration is 0.15G.
  • the power generation amount transition of the power supply device 60 is indicated by the line L1
  • the power generation amount transition of the power supply device having only one set of the DC power generation unit 30 is indicated by the line L2.
  • the spring constant of the spring 14 of the vibration power generation element 10 is adjusted so that all the resonance frequencies of the vibration power generation element 10 in the DC power generation unit 30 are the same (for example, 29.5 Hz). Yes.
  • the resonance frequency of the vibration power generation element of the power generation amount transition indicated by the line L2 is also 29.5 Hz.
  • the four DC power generation units 30 are connected in parallel to the control unit 40, so that the external vibration frequency is in the vicinity of the resonance frequency of 29.5 Hz. (For example, 29.5 Hz to 30.1 Hz), the generated power of each vibration power generation element 10 is superimposed, and the power generation amount as the power supply device 60 is 4 as compared with the case where the DC power generation unit is one set. The output is increased to about twice. As a result, the power supply device 60 can supply a sufficient amount of power to the power consumed by the wireless communication device 51 and the acceleration sensor 52 at the load 50.
  • the power generation by the power supply device 60 is also performed.
  • the amount is larger than that in the case of one set of DC power generation units, but the ratio is more than four times that in the case of a set of DC power generation units. This is because, in the power supply device 60, one set of control units 40 controls the four sets of DC power generation units 30, and the load of the control unit 40 is distributed among the units.
  • the proportion of the power consumed by the control unit 40 in the unit output power of the DC power generation unit is Because it grows.
  • the power generated by the vibration power generation element 10 is lower than that in the vicinity of the external vibration frequency. Therefore, in the case indicated by the line L2, the consumption of the control unit 40 The effect of electric power is increased, and the result shown in FIG. 6 is obtained.
  • the power supply device 60 employs a configuration in which four sets of DC power generation units 30 are connected in parallel to the control unit 40, thereby increasing the power generation amount of the power supply device 60 and reducing the external vibration frequency. Even when the resonant frequency of the vibration power generation element 10 is slightly deviated, an efficient direct current output is realized. Accordingly, from the viewpoint of driving the load 50, it is possible to expand the frequency region of external vibration that can be handled from the vicinity region to the peripheral region, and to increase the power generation amount itself.
  • the secondary battery 42 is provided in the control unit 40, but the secondary battery is not necessarily required.
  • the unit output power of each DC power generation unit 30 is supplied to the load 50 as it is.
  • the backflow prohibition circuit 21 is provided in each DC power generation unit 30, installation of the backflow prohibition circuit 21 may be avoided because the influence of the backflow on the amount of power generation can be ignored.
  • each vibration power generation is performed so that the resonance frequencies of the vibration power generation elements 10a to 10d included in the four sets of DC power generation units 30 are 27.5 Hz, 28.5 Hz, 29.5 Hz, and 30.5 Hz, respectively.
  • the spring constant of the spring 14 of the element 10 is adjusted.
  • the power generation amount transition of the power supply device 60 in this case is indicated by a line L3 in FIG.
  • the power generation amount transition (that is, the power generation amount transition indicated by the line L2 in FIG. 6) of the power supply apparatus having only one set of the DC power generation unit 30 is indicated by the line L4 as a reference.
  • the power generation amount transition shown in FIG. 7 is for the case where the acceleration of external vibration is 0.15G.
  • the resonance frequency of the vibration power generation elements 10a to 10d is set with reference to the vibration power generation element 10c having a resonance frequency of 29.5 Hz. Specifically, based on the fact that the half-value width of the power generation amount of the vibration power generation element 10c alone having a resonance frequency of 29.5 Hz (that is, the transition indicated by the line L4) is about 1 Hz, from the reference of 29.5 Hz The resonance frequency of the vibration power generation elements 10a, 10b, and 10d is set to 27.5 Hz, 28.5 Hz, and 30.5 Hz as described above by shifting by 1 Hz.
  • the unit output power of the four DC power generation units 30 is suitably overlapped in the frequency domain, and thus the power generation amount in the power generation amount transition of the power supply device 60 is relatively high. It becomes possible to acquire as large a frequency range as possible.
  • the frequency region where the power generation amount exceeds 100 ⁇ W can be determined as approximately 27.5 Hz to 31.0 Hz.
  • the power generation amount transition indicated by the line L1 in FIG. 6 that is, the transition when the resonance frequencies of the vibration power generation elements 10a to 10d are all 29.5 Hz
  • the power generation amount transition indicated by the line L3 in FIG. That is, transitions when the resonant frequencies of the vibration power generation elements 10a to 10d are 27.5 Hz, 28.5 Hz, 29.5 Hz, and 30.5 Hz, respectively, are indicated by lines L5 and L6 in FIG.
  • the acceleration of the external vibration is 0.03 G, that is, when the acceleration in FIG.
  • the acceleration of 0.03G external vibration is set as the minimum acceleration at which the power generation device 60 can generate vibration and power.
  • the power generation amount transitions indicated by the lines L5 and L6 in the former case (the case indicated by the line L5), if the external vibration frequency is close to the set resonance frequency, a relatively large power generation amount is obtained. Although it can be obtained, the amount of power generation is reduced when the external vibration frequency is separated from the resonance frequency.
  • the power generation amount in the latter case (the case indicated by line L6), the power generation amount is larger than the power generation amount in the case of one DC power generation unit, although the peak value of the power generation amount is lower than the former in a relatively wide frequency range as described above. The amount can be obtained, and the load 50 can be driven stably. This tendency is the same even when the acceleration of the external vibration is minimum as shown in FIG.
  • whether to adopt the former configuration or the latter configuration for the power supply device 60 may be appropriately selected according to the frequency of external vibration applied to the power supply device 60.
  • a specific frequency component is relatively high, for example, about two vibration power generation elements among four vibration power generation elements
  • frequencies shifted from the specific frequency by the half-value width may be set as the respective resonance frequencies.
  • the resonance frequency of the vibration power generation elements 10a and 10b is set to 29.5 Hz
  • the resonance frequency of the vibration power generation elements 10c and 10d is set to 28.5 Hz and 30.5 Hz. In this way, efficient vibration power generation can be realized.
  • the resonance frequency of the vibration power generation element 10 in each DC power generation unit 30 included in the power supply device 60 is determined in consideration of the half width of the power generation amount transition in the case of one vibration power generation element.
  • the resonance frequency of the vibration power generation element 10 may be determined based on 50 Hz and 60 Hz as the frequencies of the commercial power source.
  • the vibration generated from a motor or the like driven by the power supplied from the commercial power supply, that is, the vibration that can be external vibration applied to the power supply device 60 includes the one affected by the frequency of the commercial power supply. Therefore, by determining the resonance frequency of the vibration power generation element 10 based on 50 Hz and 60 Hz, which are the frequencies of the commercial power supply, efficient vibration power generation can be realized regardless of the frequency of the commercial power supply. Is possible.
  • the resonance frequency of the vibration power generation elements 10a and 10b in each DC power generation unit 30 included in the power supply device 60 is determined based on 60 Hz
  • the resonance frequency of the vibration power generation elements 10c and 10d is determined based on 50 Hz.
  • the former resonance frequency and the latter resonance frequency may be multiples of 60 Hz and 50 Hz, respectively.
  • the former may be 30 Hz and the latter may be 25 Hz.
  • the former and latter combinations may be 15 Hz, 12.5 Hz, 60 Hz, 50 Hz, 120 Hz, and 100 Hz, respectively.
  • FIG. 10 shows a state in which the sensor module 70 is installed in the acceleration detection target object 100 by the acceleration sensor 52.
  • a step is formed as shown in FIG. It is difficult for the vibration power generation element 30 to perform efficient vibration power generation unless external vibration is appropriately applied to the vibration power generation element 30. Therefore, when the sensor module 70 is installed on an object having such a step, each vibration power generation element 30 comes into contact with the object 100 so that external vibrations can be appropriately propagated from the object 100.
  • the sensor module 70 is formed.
  • the DC power generation units 30 including the vibration power generation elements 10 are respectively arranged on the upper surface side and the lower surface side of the so-called flexible substrate 80 whose shape is variable.
  • DC power generation units 30a and 30b corresponding to the upper steps of the object 100 are disposed on the upper surface side of the flexible substrate 80, and DC power generation units corresponding to the lower steps of the object 100 are disposed on the lower surface side of the flexible substrate 80.
  • 30c and 30d are arranged.
  • Each DC power generation unit 30, the control unit 40, and the load 50 are wired on the surface or inside of the flexible substrate 80 to form the electrical configuration shown in FIG.
  • the direct current is adjusted to the respective vibration frequency.
  • the resonance frequency of the vibration power generation elements 10a and 10b in the power generation units 30a and 30b and the resonance frequency of the vibration power generation elements 10c and 10d in the DC power generation units 30c and 30d may be set.

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  • Power Engineering (AREA)
  • General Electrical Machinery Utilizing Piezoelectricity, Electrostriction Or Magnetostriction (AREA)

Abstract

The present invention is a power supply device for outputting generated power from a power generation unit via a control unit to an object to which power is to be supplied, wherein: the power generation unit includes a plurality of DC power generation units each composed of a combination of at least a vibration power generation element for performing vibration power generation due to external vibration from outside the power supply device and a rectifying circuit for rectifying the output of the vibration power generation element; the plurality of DC power generation units are connected in parallel to the control unit; and in the individual DC power generation units, unit output powers that have passed through the rectifying circuit are input in parallel to the control unit. In this manner, the efficiency of vibration power generation due to external vibration is enhanced, and the amount of power to the object to which power is to be supplied is increased as much as possible.

Description

電源装置Power supply
　本発明は、外部振動により発電を行う振動発電素子を利用した電源装置に関する。 The present invention relates to a power supply device using a vibration power generation element that generates power by external vibration.
　昨今の省エネルギーの流れから、化石燃料等に依存しない日常的に存在する環境エネルギーが注目されている。環境エネルギーとして太陽光や風力等による発電エネルギーは広く知られているが、これらに劣らないエネルギー密度を有する環境エネルギーとして、日常周囲に存在する振動エネルギーを挙げることができる。そして、この振動エネルギーを利用して発電を行う振動発電素子が開発されており、その一例として、発電装置には電荷を半永久的に保持できるエレクトレットが広く利用されている。 From the recent trend of energy conservation, environmental energy that exists on a daily basis that does not depend on fossil fuels has attracted attention. As the environmental energy, power generation energy by sunlight, wind power or the like is widely known, but as the environmental energy having an energy density not inferior to these, vibration energy existing around the daily environment can be mentioned. And the vibration power generation element which generates electric power using this vibration energy is developed, As an example, the electret which can hold | maintain an electric charge semipermanently is widely used for the electric power generating apparatus.
　また、振動発電素子を用いて得られる監視対象機器の振動状態に基づいて、その異常状態を判断する技術も開示されている（例えば、特許文献１を参照）。当該技術では、振動発電素子で発電された電力を利用して情報処理装置側へ所定の無線送信を行い、そして該情報処理装置によるその受信間隔に基づいて監視対象機器の異常状態の判断が行われる。 In addition, a technique for determining the abnormal state based on the vibration state of the monitoring target device obtained using the vibration power generation element is also disclosed (see, for example, Patent Document 1). In this technology, predetermined wireless transmission is performed to the information processing device side using the power generated by the vibration power generation element, and the abnormal state of the monitored device is determined based on the reception interval by the information processing device. Is called.
特開２０１４－６２７７５号公報JP 2014-62775 A
　振動エネルギーを電力に変換する振動発電素子は、工場等で多く使用されているモーター等の振動に基づいて発電を行うことが可能であるため、そのような振動が多く存在する場所では、実質的に外部からの電力供給を行うことなく、所定のセンシングを行うセンサ等の負荷を長期にわたって駆動することが可能となる。一方で、このような振動発電素子による発電量は、外部振動の振幅や周波数に依存するのが一般であり、負荷での消費電力と比較して必ずしも十分な量を常に発電できるとは限らない。 A vibration power generation element that converts vibration energy into electric power can generate power based on vibrations of motors and the like that are often used in factories and the like. In addition, it is possible to drive a load such as a sensor that performs predetermined sensing over a long period of time without externally supplying power. On the other hand, the amount of power generated by such a vibration power generation element generally depends on the amplitude and frequency of external vibration, and it is not always possible to generate a sufficient amount as compared with the power consumption at the load. .
　上記の従来技術のように、無線を利用して監視対象機器の異常判断を行うことは、その異常判定のためのシステム構築において配線を省略することができ、メンテナンス面やコスト面で極めて有用である。しかし、一方で、振動発電素子の発電電力を利用して異常判断のための無線送信を、振動発電素子を有する監視対象装置側で行う場合、監視対象機器の異常に起因するのではなく、そもそも外部振動による十分な振動発電が行えなくなると本来行うべき異常監視や無線送信が行われなくなり、監視対象装置に関し誤った異常判断を下してしまう恐れもある。 As in the above prior art, using a wireless device to determine an abnormality of a monitored device can eliminate wiring in the system construction for the abnormality determination, and is extremely useful in terms of maintenance and cost. is there. However, on the other hand, when performing wireless transmission for abnormality determination using the generated power of the vibration power generation element on the monitoring target device side having the vibration power generation element, it is not caused by the abnormality of the monitoring target device. If sufficient vibration power generation due to external vibration cannot be performed, abnormality monitoring and wireless transmission that should be originally performed are not performed, and an erroneous abnormality determination may be made regarding the monitoring target device.
　本発明は、上記問題に鑑みてなされたものであり、外部振動により発電を行う振動発電素子を利用した電源装置において、外部振動による振動発電の効率を向上させるとともに、電力供給対象への電力量を可及的に増やすことを目的とする。 The present invention has been made in view of the above problems, and in a power supply device using a vibration power generation element that generates power by external vibration, the efficiency of vibration power generation by external vibration is improved and the amount of power to a power supply target The purpose is to increase as much as possible.
　本発明においては、上記課題を解決するために、電源装置からの電力出力を制御する制御部に対して、振動発電素子とそれに対応する整流回路を複数組接続する構成を採用した。これにより、可及的に多くの発電電力が制御部にまとめられることになり、電源装置における振動発電効率を高めることが可能となる。 In the present invention, in order to solve the above-described problems, a configuration in which a plurality of sets of vibration power generation elements and corresponding rectifier circuits are connected to the control unit that controls the power output from the power supply device. Accordingly, as much generated power as possible is collected in the control unit, and the vibration power generation efficiency in the power supply device can be increased.
　そこで、詳細には、本発明は、制御部を介して、発電部からの発電電力を電力供給対象へ出力する電源装置であって、前記発電部は、少なくとも、前記電源装置の外部からの外部振動によって振動発電を行う振動発電素子と、該振動発電素子の出力を整流する整流回路との組合せからなる直流発電ユニットを複数組含み、そして、前記複数の直流発電ユニットは前記制御部に対して並列に接続され、各直流発電ユニットにおいて前記整流回路を経たユニット出力電力が該制御部に並列に入力される。 Therefore, in detail, the present invention is a power supply device that outputs the generated power from the power generation unit to a power supply target via the control unit, and the power generation unit is at least an external device from the outside of the power supply device. A plurality of DC power generation units comprising a combination of a vibration power generation element that performs vibration power generation by vibration and a rectifier circuit that rectifies the output of the vibration power generation element; and the plurality of DC power generation units are connected to the control unit. Unit output power connected in parallel and passing through the rectifier circuit in each DC power generation unit is input to the control unit in parallel.
　上記に示す本発明に係る電源装置は、外部振動によって振動発電を行う振動発電素子とその出力を整流する整流回路との組合せからなる直流発電ユニットを複数組含む。当該複数組の直流発電ユニットにおける各振動発電素子の発電能力、例えば、付与される外部振動の振動エネルギーに対する発電電力の比率等は全て同一であってもよく、別法として、一部の振動発電素子の発電能力は他の振動発電素子の発電能力と異なっていてもよい。本発明において注目すべきは、振動発電素子を含む直流発電ユニットの直流出力であるユニット出力電力が、それぞれ、電源装置による発電電力の電力供給対象への供給を制御する制御部に対して並列に入力される構成が採用されていることである。 The power supply apparatus according to the present invention described above includes a plurality of DC power generation units each formed by a combination of a vibration power generation element that performs vibration power generation by external vibration and a rectifier circuit that rectifies the output thereof. The power generation capability of each vibration power generation element in the plurality of sets of DC power generation units, for example, the ratio of the generated power to the vibration energy of the external vibration to be applied may all be the same. Alternatively, some vibration power generation The power generation capacity of the element may be different from the power generation capacity of other vibration power generation elements. It should be noted in the present invention that the unit output power, which is the DC output of the DC power generation unit including the vibration power generation element, is parallel to the control unit that controls the supply of the generated power by the power supply device to the power supply target. The input configuration is adopted.
　このような構成を採用することで、制御部は、各直流発電ユニットからのユニット出力電力を重ねて発電電力とすることになり、電源装置としての発電能力を増大させることができる。また、重ねられる複数のユニット出力電力は直流電力であるため、交流電力のように波形を打ち消しあうことなく発電電力の増大を図ることができる。また、電源装置としては、各直流発電ユニットが共通する制御部によって制御されることになる。すなわち、発電電力の出力のために制御部が消費する電力を各直流発電ユニットで分担する形になるため、一つの直流発電ユニットにおける制御部の消費電力による電力ロスの比率を低減させ、結果として、電源装置としては発電効率の高い電力供給を実現することが可能となる。なお、本発明に係る電源装置において含まれる直流発電ユニットの数は、特に限定されない。好ましくは、電力供給対象において必要とされる電力が賄える程度に、直流発電ユニットの数が決定される。また、振動発電素子の構成は、特定の構成に限定されない。 By adopting such a configuration, the control unit superimposes the unit output power from each DC power generation unit to generate the generated power, and can increase the power generation capability as a power supply device. Further, since the plurality of unit output powers to be superimposed are DC power, the generated power can be increased without canceling the waveforms as in the case of AC power. Moreover, as a power supply device, each DC power generation unit is controlled by a common control unit. That is, since the power consumed by the control unit for the output of generated power is shared by each DC power generation unit, the ratio of power loss due to the power consumption of the control unit in one DC power generation unit is reduced, and as a result As a power supply device, it is possible to realize power supply with high power generation efficiency. The number of DC power generation units included in the power supply device according to the present invention is not particularly limited. Preferably, the number of DC power generation units is determined to such an extent that the power required for the power supply target can be covered. Further, the configuration of the vibration power generation element is not limited to a specific configuration.
　また、上記の電源装置において、前記複数の直流発電ユニットに含まれる前記振動発電素子のそれぞれは、前記外部振動の周波数が所定周波数であるときに、該振動発電素子の発電電力がピーク値を迎えるように形成されてもよい。換言すれば、各振動発電素子においては、外部振動に対して共振周波数を有するように構成されるものであり、以て、外部振動が共振周波数成分を多く有する振動である場合には、当該共振周波数に対応する振動発電素子は、より効率的な振動発電を実現することが可能となる。 Further, in the power supply device described above, each of the vibration power generation elements included in the plurality of DC power generation units has a peak value of the generated power of the vibration power generation element when the frequency of the external vibration is a predetermined frequency. It may be formed as follows. In other words, each vibration power generation element is configured to have a resonance frequency with respect to the external vibration. Therefore, when the external vibration is a vibration having a lot of resonance frequency components, the resonance The vibration power generation element corresponding to the frequency can realize more efficient vibration power generation.
　そして、このように振動発電素子が構成される場合において、前記複数の直流発電ユニットには、前記所定周波数が異なる少なくとも２種類の前記振動発電素子が含まれてもよい。この結果、外部振動の振動周波数が変化した場合や、外部振動に複数の振動周波数成分が含まれる場合等に、効率的な振動発電を実現することが可能となる。なお、本発明に係る電源装置においては、所定周波数が異なる少なくとも２種類の振動発電素子が含まれることから、複数の直流発電ユニットにおいて含まれる振動発電素子の所定周波数が、必ずしも全て互いに異なる必要はなく、例えば、一又は複数の振動発電素子を含む第１の振動発電素子群の所定周波数と、その他の振動発電素子を含む第２振動発電素子群の所定周波数が異なっていてもよく、別法として、更に異なる所定周波数に対応する別の振動発電素子群が形成されてもよい。 In the case where the vibration power generation element is configured as described above, the plurality of DC power generation units may include at least two types of vibration power generation elements having different predetermined frequencies. As a result, it is possible to realize efficient vibration power generation when the vibration frequency of the external vibration changes or when the external vibration includes a plurality of vibration frequency components. In the power supply device according to the present invention, since at least two types of vibration power generation elements having different predetermined frequencies are included, the predetermined frequencies of the vibration power generation elements included in the plurality of DC power generation units are not necessarily different from each other. For example, the predetermined frequency of the first vibration power generation element group including one or a plurality of vibration power generation elements may be different from the predetermined frequency of the second vibration power generation element group including other vibration power generation elements. As another example, another vibration power generation element group corresponding to a different predetermined frequency may be formed.
　また、上記の電源装置において、前記異なる所定周波数に、第１周波数と第２周波数が含まれる場合、前記第１周波数は、前記第２周波数に対して、該第２周波数に対応する前記振動発電素子である第２発電素子による、振動周波数に対する発電量の推移の半値幅以上ずれ、且つ、該第１周波数に対応する前記振動発電素子である第１発電素子による、振動周波数に対する発電量の推移と、該第２発電素子に関する該推移とは互いに重なるように、該第１周波数と該第２周波数は設定されてもよい。このように第１発電素子の第１周波数と第２発電素子の第２周波数の相対関係が設定されると、電源装置における外部振動の振動周波数に対する発電量の推移において、外部振動の振動周波数が変化しても発電量が安定する領域を広く確保することができる。これは、第１周波数と第２周波数とが上記半値幅以上のずれをもって設定された上で、第１発電素子による発電電力が対応する整流回路によって整流された出力と、第２発電素子による発電電力が対応する整流回路によって整流された出力とが重ねられて、電源装置の当該推移が形成されるからである。特に好ましくは、前記第１周波数は、前記第２周波数に対して、前記第２発電素子に関する前記推移の半値幅ずれるように、該第１周波数と該第２周波数は設定される。 In the above power supply apparatus, when the different predetermined frequencies include a first frequency and a second frequency, the first frequency is the vibration power generation corresponding to the second frequency with respect to the second frequency. The transition of the amount of power generation with respect to the vibration frequency by the first power generation element that is a deviation from the half-value width of the transition of the power generation amount with respect to the vibration frequency by the second power generation element that is the element and that corresponds to the first frequency Further, the first frequency and the second frequency may be set so that the transition related to the second power generation element overlaps with each other. When the relative relationship between the first frequency of the first power generation element and the second frequency of the second power generation element is set as described above, the vibration frequency of the external vibration is changed in the transition of the power generation amount with respect to the vibration frequency of the external vibration in the power supply device. Even if it changes, the area | region where electric power generation amount is stabilized can be ensured widely. This is because the first frequency and the second frequency are set with a deviation equal to or greater than the half width, and the output generated by the first power generation element is rectified by the corresponding rectifier circuit, and the power generation by the second power generation element. This is because the transition of the power supply device is formed by superimposing the output rectified by the corresponding rectifier circuit. Particularly preferably, the first frequency and the second frequency are set such that the first frequency is deviated from the second frequency by the half-value width of the transition with respect to the second power generation element.
　ここで、上記の電源装置において、前記異なる所定周波数に第１周波数と第２周波数が含まれる場合の、第１周波数と第２周波数の設定手法の別法として、前記第１周波数及び前記第２周波数のそれぞれは、５０Ｈｚ及び６０Ｈｚの倍数とされてもよい。このように構成されることで、本発明に係る電源装置は、商用電源の周波数である５０Ｈｚ及び６０Ｈｚの何れかに起因した外部振動を利用して、電力供給対象への電力供給を実現することができる。 Here, in the above power supply apparatus, as another method of setting the first frequency and the second frequency when the different predetermined frequencies include the first frequency and the second frequency, the first frequency and the second frequency are set as another method. Each of the frequencies may be a multiple of 50 Hz and 60 Hz. With this configuration, the power supply device according to the present invention realizes power supply to a power supply target using external vibration caused by either 50 Hz or 60 Hz, which is the frequency of the commercial power supply. Can do.
　ここで、上述までの電源装置において、前記複数の直流発電ユニットのそれぞれは、前記整流回路と前記制御部との間に、電流が該整流回路側に流れ込む逆流を禁止する逆流禁止回路を有してもよい。上記の通り、本発明に係る電源装置においては、制御部に対して複数の直流発電ユニットが並列に接続される。そして、各直流発電ユニットに含まれる振動発電素子は、外部振動による振動発電を行っている場合でも、必ずしもすべての振動発電素子が同じ発電量を出力するとは限らず、その発電量の差によって各直流発電ユニットの出力端子上に電位差が生じる。そのため、その電位差によって整流回路側への逆流が生じてしまうと、結果として電源装置としての発電電力が低下してしまうことになる。そこで、上記のように当該逆流を禁止するための逆流禁止回路を、各直流発電ユニットの整流回路と制御部との間に設けることで、電源装置の発電電力低下を抑制することができる。 Here, in the power supply device described above, each of the plurality of DC power generation units has a backflow prohibition circuit that prohibits a backflow in which a current flows into the rectification circuit side between the rectification circuit and the control unit. May be. As described above, in the power supply device according to the present invention, a plurality of DC power generation units are connected in parallel to the control unit. And even if the vibration power generation element included in each DC power generation unit is performing vibration power generation by external vibration, not all vibration power generation elements necessarily output the same power generation amount. A potential difference is generated on the output terminal of the DC power generation unit. Therefore, if a backflow to the rectifier circuit side occurs due to the potential difference, as a result, the generated power as the power supply device decreases. Therefore, by providing the backflow prohibition circuit for prohibiting the backflow as described above between the rectifier circuit of each DC power generation unit and the control unit, it is possible to suppress a decrease in the generated power of the power supply device.
　ここで、上述までの電源装置において、前記制御部は、前記複数の直流発電ユニットからの発電電力を蓄電する二次電池を有してもよい。これにより制御部は、各直流発電ユニットからの発電電力を二次電池に蓄電することで、電力供給対象への発電電力の供給時期を好適に制御することが可能となる。 Here, in the power supply device described above, the control unit may include a secondary battery that stores the generated power from the plurality of DC power generation units. Thus, the control unit can appropriately control the supply timing of the generated power to the power supply target by storing the generated power from each DC power generation unit in the secondary battery.
　また、上述までの電源装置において、前記複数の直流発電ユニットのうち少なくとも一部の直流発電ユニットが、フレキシブル基板上に配置されてもよい。このように直流発電ユニットがフレキシブル基板を介して接続されることで、適切に外部振動が付与され、効率的な振動発電が実現可能となる。また、フレキシブル基板上の配置の一例として、前記複数の直流発電ユニットのうち一部の直流発電ユニットは、一つのフレキシブル基板の一方の面上に配置され、該複数の直流発電ユニットのうち残りの直流発電ユニットは、該フレキシブル基板の他方の面上に配置されてもよい。このようにフレキシブル基板を挟んでそれぞれの面上に直流発電ユニットを配置することで、一部の直流発電ユニットと残りの直流発電ユニットとを、それぞれ異なる位置に配置できる。その結果、一部の直流発電ユニットと残りの直流発電ユニットのそれぞれに対して適切に外部振動が付与される環境を形成でき、以て、より効率的な振動発電を実現することが可能となる。 In the power supply device described above, at least some of the plurality of DC power generation units may be disposed on the flexible substrate. Thus, by connecting the DC power generation unit via the flexible substrate, external vibration is appropriately applied, and efficient vibration power generation can be realized. In addition, as an example of the arrangement on the flexible substrate, some DC power generation units among the plurality of DC power generation units are arranged on one surface of one flexible substrate, and the remaining DC power generation units among the plurality of DC power generation units The DC power generation unit may be disposed on the other surface of the flexible substrate. In this way, by arranging the DC power generation units on the respective surfaces with the flexible substrate interposed therebetween, a part of the DC power generation units and the remaining DC power generation units can be arranged at different positions. As a result, it is possible to form an environment in which external vibration is appropriately applied to each of some of the DC power generation units and the remaining DC power generation units, thereby realizing more efficient vibration power generation. .
　外部振動により発電を行う振動発電素子を利用した電源装置において、外部振動による振動発電の効率を向上させるとともに、電力供給対象への電力量を可及的に増やす。 In a power supply device using a vibration power generation element that generates power by external vibration, the efficiency of vibration power generation by external vibration is improved and the amount of power to the power supply target is increased as much as possible.
本発明の電源装置が有する振動発電素子の概略構成を示す第１の図である。It is a 1st figure which shows schematic structure of the vibration electric power generation element which the power supply device of this invention has. 本発明の電源装置が有する振動発電素子の概略構成を示す第２の図である。It is a 2nd figure which shows schematic structure of the vibration electric power generation element which the power supply device of this invention has. 本発明の電源装置が有する振動発電素子の概略構成を示す第３の図である。It is a 3rd figure which shows schematic structure of the vibration electric power generation element which the power supply device of this invention has. 本発明の電源装置の概略構成を示す図である。It is a figure which shows schematic structure of the power supply device of this invention. 本発明の電源装置に関する回路図である。It is a circuit diagram regarding the power supply device of this invention. 本発明の電源装置における、振動周波数に対する発電量の推移を示す第１の図である。It is a 1st figure which shows transition of the electric power generation amount with respect to the vibration frequency in the power supply device of this invention. 本発明の電源装置における、振動周波数に対する発電量の推移を示す第２の図である。It is a 2nd figure which shows transition of the electric power generation amount with respect to the vibration frequency in the power supply device of this invention. 本発明の電源装置における、振動周波数に対する発電量の推移を示す第３の図である。It is a 3rd figure which shows transition of the electric power generation amount with respect to the vibration frequency in the power supply device of this invention. 本発明の電源装置における、振動周波数に対する発電量の推移を示す第４の図である。It is a 4th figure which shows transition of the electric power generation amount with respect to the vibration frequency in the power supply device of this invention. 本発明の電源装置を含むセンサモジュールが電力供給対象物に配置された状態を示す図である。It is a figure which shows the state by which the sensor module containing the power supply device of this invention was arrange | positioned at the power supply target object.
　以下に、図面を参照して、本発明の実施形態に係る振動発電素子について説明する。なお、以下の実施形態の構成は例示であり、本発明はこの実施の形態の構成に限定されるものではない。 Hereinafter, a vibration power generation element according to an embodiment of the present invention will be described with reference to the drawings. The configuration of the following embodiment is an exemplification, and the present invention is not limited to the configuration of this embodiment.
　先ず、図１、図２、図３に基づいて、本発明に係る電源装置に含まれる振動発電素子１０の概略構成について説明する。図１は、外部振動による振動発電を行う振動発電素子１０における、可動部材１と固定部材５のそれぞれに設けられたエレクトレット群１ａおよび電極群５ａの構成を示す。なお、図１においては、エレクトレットおよび電極が並べられる方向であって、固定部材５に対する可動部材１の相対移動方向をＸ方向、可動部材１と固定部材が対向する方向をＺ方向、Ｘ方向およびＺ方向に直交する方向をＹ方向とする。そして、図１は振動発電素子１０をＺＸ平面で切断したときの断面図である。 First, a schematic configuration of the vibration power generation element 10 included in the power supply device according to the present invention will be described with reference to FIGS. 1, 2, and 3. FIG. 1 shows a configuration of an electret group 1a and an electrode group 5a provided on each of a movable member 1 and a fixed member 5 in a vibration power generation element 10 that performs vibration power generation by external vibration. In FIG. 1, the electret and the electrode are arranged in a direction in which the relative movement direction of the movable member 1 with respect to the fixed member 5 is the X direction, and the directions in which the movable member 1 and the fixed member are opposed are the Z direction, the X direction, and The direction orthogonal to the Z direction is defined as the Y direction. FIG. 1 is a cross-sectional view of the vibration power generation element 10 taken along the ZX plane.
　振動発電素子１０において、可動部材１及び固定部材５は、後述する図２等に示す筐体１１の内部に収納される。可動部材１と、固定部材５は、互いに対向した状態を保ったまま、相対的に移動可能に構成されており、当該相対移動を可能とする可動部材１の支持構造については後述する。また、固定部材５は筐体１１に固定されている。これに対して、可動部材１は、その両端がそれぞれバネ１４によって筺体１１につながれているため（図２等を参照）、可動部材１そのものは、外部振動によって筐体１１に固定された固定部材５に対して相対的に往復運動（振動）するように構成されている。 In the vibration power generation element 10, the movable member 1 and the fixed member 5 are housed in a housing 11 shown in FIG. The movable member 1 and the fixed member 5 are configured to be relatively movable while maintaining a state of facing each other, and a support structure of the movable member 1 that enables the relative movement will be described later. The fixing member 5 is fixed to the housing 11. On the other hand, since both ends of the movable member 1 are respectively connected to the housing 11 by springs 14 (see FIG. 2 and the like), the movable member 1 itself is a fixed member fixed to the casing 11 by external vibration. 5 is configured to reciprocate (vibrate) relative to the other.
　なお、可動部材１と固定部材５は、互いに対向した状態で、かつ互いに平行な状態を保ったまま、つまり対向する面の間隔が一定の状態を保ったまま、相対的に移動可能に構成されている。これにより、可動部材１側のエレクトレット２の作用によって固定部材５側の一対の電極６、７に電気信号を生成することが可能となる。この電気信号の生成原理については従来技術であることから、本明細書ではその詳細な説明は割愛する。 The movable member 1 and the fixed member 5 are configured to be relatively movable while being opposed to each other and maintaining a parallel state to each other, that is, maintaining a constant interval between the opposing surfaces. ing. Thereby, it becomes possible to generate an electrical signal for the pair of electrodes 6 and 7 on the fixed member 5 side by the action of the electret 2 on the movable member 1 side. Since this electric signal generation principle is a conventional technique, a detailed description thereof is omitted in this specification.
　ここで、可動部材１側の構造について説明する。可動部材１は、可動基板１ｂ上に、エレクトレット群１ａが形成されている。このエレクトレット群１ａは、可動部材１における固定部材５との対向面側に設けられ、それぞれ導電体上に形成された複数のエレクトレット２と、いずれも接地されていない複数のガード電極４を含む。そして、固定部材５に対する可動部材１の相対移動方向（Ｘ方向）に沿って、エレクトレット２とガード電極４が交互に並ぶように配置されている。この複数のエレクトレット２と複数のガード電極４はそれぞれ櫛状に形成され、それぞれのエレクトレット２と、それぞれのガード電極４が入れ子状に配置されているが、上記のとおり、図１はＺＸ断面図であるため、エレクトレット２とガード電極４が交互に配置されているように図示される。本実施形態においては、エレクトレット２はマイナスの電荷を半永久的に保持するように構成されている。なお、ガード電極４については、本実施形態では上記の通り接地させない構成を採用しているが、それに代えて接地させる構成を採用してもよい。 Here, the structure on the movable member 1 side will be described. In the movable member 1, an electret group 1a is formed on a movable substrate 1b. The electret group 1a includes a plurality of electrets 2 provided on the surface of the movable member 1 facing the fixed member 5 and formed on a conductor, respectively, and a plurality of guard electrodes 4 that are not grounded. The electrets 2 and the guard electrodes 4 are arranged alternately along the relative movement direction (X direction) of the movable member 1 with respect to the fixed member 5. The plurality of electrets 2 and the plurality of guard electrodes 4 are each formed in a comb shape, and the respective electrets 2 and the respective guard electrodes 4 are arranged in a nested manner. As described above, FIG. 1 is a ZX sectional view. Therefore, the electret 2 and the guard electrode 4 are illustrated as being alternately arranged. In the present embodiment, the electret 2 is configured to hold a negative charge semipermanently. The guard electrode 4 employs a configuration in which the guard electrode 4 is not grounded as described above, but may be configured to be grounded instead.
　次に、固定部材５側の構造について説明する。固定部材５は、固定基板５ｂ上に、電極群５ａが形成されている。この電極群５ａは、固定部材５おける可動部材１との対向面側に設けられ、一対の電極（第一電極６と第二電極７）を一組とする小電極群を複数組み含む。 Next, the structure on the fixing member 5 side will be described. In the fixing member 5, an electrode group 5a is formed on a fixed substrate 5b. The electrode group 5a is provided on the surface of the fixed member 5 facing the movable member 1, and includes a plurality of small electrode groups each including a pair of electrodes (first electrode 6 and second electrode 7).
　このように構成される振動発電素子１０では、外部振動によるエレクトレット２を有する可動部材１の固定部材５に対する相対的な位置変動に起因して、電極６、７間に当該相対的位置変動（振動）に応じた起電力が生じ、発電が行われる。そして、発電された電力は整流回路２０によって整流される。 In the vibration power generation element 10 configured as described above, the relative position fluctuation (vibration) between the electrodes 6 and 7 due to the relative position fluctuation of the movable member 1 having the electret 2 with respect to the fixed member 5 due to external vibration. ) Is generated and power is generated. The generated power is rectified by the rectifier circuit 20.
　次に、図２は、振動発電素子１０の上面図（ＸＹ平面における上面図）であり、図３は、図２におけるＡ－Ａ断面図（ＺＹ平面における断面図）である。ただし、図２は、筐体１１の上面１１ｃが外され、その内部が上方より可視化された状態を表している。これらの図からも分かるように、電極群５ａおよび固定基板５ｂを含む固定部材５と、エレクトレット群１ａおよび可動基板１ｂを含む可動部材１は、振動発電素子１０の筐体１１に収容されている。当該筐体１１は、略直方体の形状を有し、上面１１ｃと底面１１ｂ、可動部材１の相対移動方向であるＸ方向に延在する一組の側面１１ａと、当該相対移動方向に直交する側面であってＹ方向に延在する一組の側面１１ｄを有する。 Next, FIG. 2 is a top view (top view in the XY plane) of the vibration power generation element 10, and FIG. 3 is a cross-sectional view along AA in FIG. 2 (cross-sectional view in the ZY plane). However, FIG. 2 shows a state in which the upper surface 11c of the housing 11 is removed and the inside is visualized from above. As can be seen from these drawings, the fixed member 5 including the electrode group 5 a and the fixed substrate 5 b and the movable member 1 including the electret group 1 a and the movable substrate 1 b are accommodated in the casing 11 of the vibration power generation element 10. . The casing 11 has a substantially rectangular parallelepiped shape, and includes a top surface 11c and a bottom surface 11b, a pair of side surfaces 11a extending in the X direction that is the relative movement direction of the movable member 1, and a side surface orthogonal to the relative movement direction. And has a pair of side surfaces 11d extending in the Y direction.
　そして、図３に示すように、固定部材５は、電極群５ａが上方（筐体１１の内側）を向くようにして、筐体１１の底面１１ｂに固定されている。一方で、このように筐体１１に固定された固定部材５に対して、可動部材１は複数の支持用鋼球１２を介して該固定部材５に対して相対移動が可能となるように支持されている。すなわち、底面１１ｂの内壁面上に配置された複数の支持用鋼球１２の上に、更に可動部材１が配置される構成となっている。このように可動部材が支持用鋼球１２で支持された状態で、可動部材１側のエレクトレット群１ａと、固定部材５の電極群５ａとの間の間隔距離が、振動発電に適した所定の距離に規定される。 And as shown in FIG. 3, the fixing member 5 is being fixed to the bottom face 11b of the housing | casing 11 so that the electrode group 5a may face upward (inside of the housing | casing 11). On the other hand, with respect to the fixed member 5 fixed to the housing 11 in this way, the movable member 1 is supported so as to be able to move relative to the fixed member 5 via a plurality of supporting steel balls 12. Has been. That is, the movable member 1 is further arranged on the plurality of supporting steel balls 12 arranged on the inner wall surface of the bottom surface 11b. In this state where the movable member is supported by the support steel ball 12, the distance between the electret group 1a on the movable member 1 side and the electrode group 5a of the fixed member 5 is a predetermined value suitable for vibration power generation. Stipulated in distance.
　また、図２に示すように、可動部材１については、可動部材１と側面１１ａの内壁面との間に更なる支持用鋼球１３が配置されている。側面１１ａの内壁面と対向する、可動基板１ｂの側面の両端に端部側突起１ｄと、当該可動基板１ｂの側面の中央部分に中央突起１ｃが設置され、端部側突起１ｄと中央突起１ｃとの間に、支持用鋼球１３が配置可能な支持用溝１ｅが形成される。したがって、図２に示すように、可動部材１の左右それぞれに２つずつ、支持用溝１ｅが形成され、それぞれに支持用鋼球１３が配置される。このように可動部材１の側方において、筐体１１の内壁面との間に支持用鋼球１３を配置させることで、固定部材５に対する可動部材１の相対移動方向に沿った移動を円滑に行わせることが可能となる。 Further, as shown in FIG. 2, with respect to the movable member 1, a further supporting steel ball 13 is disposed between the movable member 1 and the inner wall surface of the side surface 11a. End side projections 1d are provided at both ends of the side surface of the movable substrate 1b facing the inner wall surface of the side surface 11a, and a central projection 1c is provided at the center of the side surface of the movable substrate 1b. Between the two, a support groove 1e in which the support steel ball 13 can be disposed is formed. Therefore, as shown in FIG. 2, two support grooves 1 e are formed on each of the left and right sides of the movable member 1, and the support steel balls 13 are disposed in each. As described above, by arranging the supporting steel balls 13 between the movable member 1 and the inner wall surface of the housing 11, the movement along the relative movement direction of the movable member 1 with respect to the fixed member 5 can be smoothly performed. It is possible to make it happen.
　更に、可動部材１のＸＹ平面における概ね中央部分に設けられた接続部１５を介して、可動部材１と筐体１１の２つの側面１１ｄのそれぞれとの間にバネ１４が配置されている。図２に示す状態では、バネ１４は側面１１ｄの概ね中央部分に接続され、各バネ１４による弾性力は、相対移動方向（Ｘ方向）に作用するように配置されている。バネ１４の弾性力により、外部振動を受けた可動部材１は筐体１１内で往復運動を行い、効率的な振動発電が実現される。 Furthermore, a spring 14 is disposed between the movable member 1 and each of the two side surfaces 11d of the housing 11 via a connection portion 15 provided substantially at the center in the XY plane of the movable member 1. In the state shown in FIG. 2, the spring 14 is connected to a substantially central portion of the side surface 11 d, and the elastic force by each spring 14 is arranged to act in the relative movement direction (X direction). Due to the elastic force of the spring 14, the movable member 1 that has received external vibration reciprocates within the housing 11, thereby realizing efficient vibration power generation.
　このように、本実施例に係る振動発電素子１０では、可動部材１については、支持用鋼球１２による底面１１ｂに対する支持と、支持用鋼球１３による側面１１ａに対する支持が独立して行われていることになる。ここで、振動発電素子１０に外部振動が付与された場合、その物理的特性から外部振動の周波数が所定周波数のときに固定部材５に対する可動部材１の振幅が最大となる共振現象が発生する。可動部材１の振幅が最大となることによって、単位時間あたりに可動部材１側のエレクトレットが横切る電極数が増えるため、振動発電素子１０の発電量が増加することになる。したがって、発電効率の観点に立てば、振動発電素子１０における可動部材１の共振周波数（以下、単に「振動発電素子１０の共振周波数」という）が、可及的に外部振動の周波数に近づく又は一致するのが好ましい。そして、この振動発電素子１０の共振周波数は、可動部材１の重量やバネ１４のバネ定数を調整することで所望の周波数に設定可能である。 As described above, in the vibration power generation element 10 according to the present embodiment, the movable member 1 is independently supported by the support steel ball 12 for the bottom surface 11b and by the support steel ball 13 for the side surface 11a. Will be. Here, when external vibration is applied to the vibration power generation element 10, a resonance phenomenon occurs in which the amplitude of the movable member 1 with respect to the fixed member 5 becomes maximum when the frequency of the external vibration is a predetermined frequency due to its physical characteristics. When the amplitude of the movable member 1 is maximized, the number of electrodes that the electret on the movable member 1 side crosses per unit time increases, and thus the power generation amount of the vibration power generation element 10 increases. Therefore, from the viewpoint of power generation efficiency, the resonance frequency of the movable member 1 in the vibration power generation element 10 (hereinafter simply referred to as “resonance frequency of the vibration power generation element 10”) approaches or coincides with the frequency of external vibration as much as possible. It is preferable to do this. The resonance frequency of the vibration power generation element 10 can be set to a desired frequency by adjusting the weight of the movable member 1 and the spring constant of the spring 14.
　ここで、図４及び図５に基づいて、本実施例に係る電源装置６０を有するセンサモジュール７０の概略構成について説明する。図４は、電源装置６０及びセンサモジュール７０の概略構成を示し、図５は、図４に示す電源装置６０に対応する回路構成を示す。センサモジュール７０は、電源装置６０及び当該電源装置からの電力供給を受けて作動する負荷５０を含む。この負荷５０は、本発明における電力供給対象に相当する。 Here, based on FIG.4 and FIG.5, schematic structure of the sensor module 70 which has the power supply device 60 which concerns on a present Example is demonstrated. 4 shows a schematic configuration of the power supply device 60 and the sensor module 70, and FIG. 5 shows a circuit configuration corresponding to the power supply device 60 shown in FIG. The sensor module 70 includes a power supply device 60 and a load 50 that operates by receiving power supply from the power supply device. This load 50 corresponds to a power supply target in the present invention.
　ここで、電源装置６０には、上記振動発電素子１０、整流・平滑回路２０、逆流禁止回路２１を含んで構成される直流発電ユニット３０が、複数組（本実施例においては４組）含まれる。なお、本明細書においては、直流発電ユニットを総じて指す場合にはその参照番号を３０とし、各直流発電ユニットを指す場合には、それぞれの直流発電ユニットに対応する添え字（ａ～ｄ）を番号３０に添付して参照する。また、直流発電ユニット３０に含まれる振動発電素子１０、整流・平滑回路２０、逆流禁止回路２１の参照番号についても、同様である。 Here, the power supply device 60 includes a plurality of sets (four sets in this embodiment) of the DC power generation unit 30 including the vibration power generation element 10, the rectification / smoothing circuit 20, and the backflow prohibition circuit 21. . In this specification, when referring to DC power generation units as a whole, the reference number thereof is 30. When referring to each DC power generation unit, subscripts (a to d) corresponding to the respective DC power generation units are used. Reference is made to FIG. The same applies to the reference numerals of the vibration power generation element 10, the rectification / smoothing circuit 20, and the backflow prohibition circuit 21 included in the DC power generation unit 30.
　外部振動による振動発電素子１０の発電電力は、図１に示す振動発電素子１０の構成から交流電力であることが分かる。そこで、その発電電力を直流電力に変換するために、当該発電電力が、整流・平滑回路２０に通される。具体的には、図５に示すように、直流発電ユニット３０ａの整流・平滑回路２０ａは、４つのダイオードＤ１～Ｄ４によるフルブリッジ回路とコンデンサＣ１によって形成され、直流発電ユニット３０ｂの整流・平滑回路２０ｂは、４つのダイオードＤ５～Ｄ８によるフルブリッジ回路とコンデンサＣ２によって形成され、直流発電ユニット３０ｃの整流・平滑回路２０ｃは、４つのダイオードＤ９～Ｄ１２によるフルブリッジ回路とコンデンサＣ３によって形成され、直流発電ユニット３０ｄの整流・平滑回路２０ｄは、４つのダイオードＤ１３～Ｄ１６によるフルブリッジ回路とコンデンサＣ４によって形成されている。 It can be seen that the generated power of the vibration power generation element 10 due to external vibration is AC power from the configuration of the vibration power generation element 10 shown in FIG. Therefore, in order to convert the generated power into DC power, the generated power is passed through the rectifying / smoothing circuit 20. Specifically, as shown in FIG. 5, the rectification / smoothing circuit 20a of the DC power generation unit 30a is formed by a full bridge circuit including four diodes D1 to D4 and a capacitor C1, and the rectification / smoothing circuit of the DC power generation unit 30b. 20b is formed by a full bridge circuit including four diodes D5 to D8 and a capacitor C2, and a rectifying / smoothing circuit 20c of the DC power generation unit 30c is formed by a full bridge circuit including four diodes D9 to D12 and a capacitor C3. The rectifying / smoothing circuit 20d of the power generation unit 30d is formed by a full bridge circuit including four diodes D13 to D16 and a capacitor C4.
　そして、直流発電ユニット３０において、整流・平滑回路２０を経た発電電力は、逆流禁止回路２１を経て、直流発電ユニット３０の出力となる。具体的には、図５に示すように、直流発電ユニット３０ａの逆流禁止回路２１ａはダイオードＤＡ１で形成され、直流発電ユニット３０ｂの逆流禁止回路２１ｂはダイオードＤＡ２で形成され、直流発電ユニット３０ｃの逆流禁止回路２１ｃはダイオードＤＡ３で形成され、直流発電ユニット３０ｄの逆流禁止回路２１ｄはダイオードＤＡ４で形成される。これらのダイオードＤ１～Ｄ４により、直流発電ユニット３０ａ～３０ｄでは、外部からの電流の流入（逆流）が禁止されることになる。後述するように、振動発電素子１０ａ～１０ｄの共振周波数等の振動発電条件は必ずしも同じではなく、また仮に振動発電条件が同じであっても製造上の個体差も存在するため、整流・平滑回路２０を出た端子での電位は、直流発電ユニット３０ごとにばらつきやすい。その結果、直流発電ユニット３０間に電位差が生じ、その電位差に従い特定の直流発電ユニット３０に外部から電流が流れ込むと、電源装置６０としての発電電力が低下してしまうため、それを回避するために逆流禁止回路２１が各直流発電ユニット３０に設けられている。そして、逆流禁止回路２１の出力が、各直流発電ユニット３０の出力となる。 Then, in the DC power generation unit 30, the generated power that has passed through the rectification / smoothing circuit 20 becomes the output of the DC power generation unit 30 through the backflow prohibition circuit 21. Specifically, as shown in FIG. 5, the backflow prohibiting circuit 21a of the DC power generation unit 30a is formed by a diode DA1, and the backflow prohibiting circuit 21b of the DC power generation unit 30b is formed by a diode DA2, and the backflow of the DC power generation unit 30c. The prohibition circuit 21c is formed of a diode DA3, and the reverse current prohibition circuit 21d of the DC power generation unit 30d is formed of a diode DA4. By these diodes D1 to D4, inflow (reverse flow) of current from the outside is prohibited in the DC power generation units 30a to 30d. As will be described later, the vibration power generation conditions such as the resonance frequencies of the vibration power generation elements 10a to 10d are not necessarily the same, and there are individual differences in manufacturing even if the vibration power generation conditions are the same. The potential at the terminal leaving 20 tends to vary from one DC power generation unit 30 to another. As a result, a potential difference is generated between the DC power generation units 30, and when a current flows into the specific DC power generation unit 30 from the outside according to the potential difference, the generated power as the power supply device 60 is reduced. A backflow prohibition circuit 21 is provided in each DC power generation unit 30. The output of the backflow prohibition circuit 21 becomes the output of each DC power generation unit 30.
　本実施例の電源装置では、図４に示すように、これらの４組の直流発電ユニット３０が並列に制御部４０に対して接続される。すなわち、電源装置６０を含むセンサモジュール７０に対して外部振動が付与されると、各直流発電ユニット３０内の振動発電素子１０による振動発電が行われ、その発電電力が整流・平滑回路２０、逆流禁止回路２１を経て直流発電ユニット３０の出力となる電力（本発明におけるユニット出力電力に相当する）が重ねて制御部４０に入力されるように、各直流発電ユニット３０と制御部４０の電気的な接続関係が設定されている。 In the power supply device of the present embodiment, as shown in FIG. 4, these four sets of DC power generation units 30 are connected to the control unit 40 in parallel. That is, when external vibration is applied to the sensor module 70 including the power supply device 60, vibration power generation is performed by the vibration power generation element 10 in each DC power generation unit 30, and the generated power is rectified and smoothed by the rectifying / smoothing circuit 20, backflow. The electric power of each DC power generation unit 30 and the control unit 40 so that the power (corresponding to the unit output power in the present invention) that is output from the DC power generation unit 30 through the prohibition circuit 21 is input to the control unit 40 in an overlapping manner. A proper connection relationship is set.
　また、制御部４０は、電源装置６０の電力供給、すなわち各振動発電素子１０による発電電力の負荷５０への供給を制御するための機能部であり、具体的には、所定の電源制御回路４１や図示しないマイコンで形成される。また、制御部４０は、二次電池４２を有しており、各直流発電ユニット３０からのユニット出力電力を二次電池４２に蓄電し、又は、二次電池４２に蓄電された電力を負荷５０に対して放電する蓄電・放電に関する制御を行う。 The control unit 40 is a functional unit for controlling the power supply of the power supply device 60, that is, the supply of the generated power by each vibration power generation element 10 to the load 50, specifically, a predetermined power control circuit 41. Or a microcomputer (not shown). The control unit 40 includes a secondary battery 42, and stores the unit output power from each DC power generation unit 30 in the secondary battery 42, or loads the power stored in the secondary battery 42 with a load 50. The control relating to the storage / discharge to be performed is performed.
　また、負荷５０は、上記の通り電源装置６０からの供給電力により駆動されるものであり、具体的には、無線通信デバイス５１と加速度センサ５２を有している。加速度センサ５２は、センサモジュール７０が配置される測定対象物に生じている加速度を検出するセンサであり、その検出データが、無線通信デバイス５１によってセンサモジュール外の受信装置に送信される。このように構成されるセンサモジュール７０は、電源装置６０が外部振動により振動発電を行うことで、センサモジュール外部から電力の供給を受けることなく、センサモジュール７０が配置された測定対象物の加速度の検出、及びその検出データの収集のためのデータ送信を実現する。なお、本実施例ではセンサモジュール７０に含まれるセンサとして加速度センサ５２を例示したが、本発明としては加速度センサに拘泥されるものではなく、データ収集の目的に応じて、その他のセンサ、例えば、圧力センサや温度センサが、加速度センサ５２とともに、又は加速度センサ５２に代わって、センサモジュール７０に搭載されてもよい。 Further, the load 50 is driven by the power supplied from the power supply device 60 as described above, and specifically includes the wireless communication device 51 and the acceleration sensor 52. The acceleration sensor 52 is a sensor that detects the acceleration generated in the measurement object on which the sensor module 70 is disposed, and the detection data is transmitted to the reception device outside the sensor module by the wireless communication device 51. In the sensor module 70 configured as described above, the power supply device 60 performs vibration power generation by external vibration, so that the acceleration of the measurement object on which the sensor module 70 is disposed can be obtained without receiving power supply from the outside of the sensor module. Data transmission for detection and collection of the detection data is realized. In the present embodiment, the acceleration sensor 52 is exemplified as the sensor included in the sensor module 70. However, the present invention is not limited to the acceleration sensor, and other sensors, for example, according to the purpose of data collection, for example, A pressure sensor or a temperature sensor may be mounted on the sensor module 70 together with the acceleration sensor 52 or instead of the acceleration sensor 52.
　ここで、図６に、外部振動の振動周波数に対する電源装置６０による発電量の推移（以下、「発電量推移」という）を示す。なお、図６に示す発電量推移は、外部振動の加速度が０．１５Ｇの場合のものである。図中、線Ｌ１で示されるのが電源装置６０の発電量推移であり、線Ｌ２で示されるのが、直流発電ユニット３０を一組のみ有する電源装置の発電量推移である。なお、本実施例の場合、直流発電ユニット３０内の振動発電素子１０の共振周波数が全て同じとなるように（例えば、２９．５Ｈｚ）、振動発電素子１０のバネ１４のバネ定数が調整されている。また、線Ｌ２で示される発電量推移の振動発電素子の共振周波数も同じく２９．５Ｈｚとされている。 Here, FIG. 6 shows the transition of the power generation amount by the power supply device 60 with respect to the vibration frequency of the external vibration (hereinafter referred to as “power generation transition”). The power generation amount transition shown in FIG. 6 is for the case where the acceleration of the external vibration is 0.15G. In the figure, the power generation amount transition of the power supply device 60 is indicated by the line L1, and the power generation amount transition of the power supply device having only one set of the DC power generation unit 30 is indicated by the line L2. In the case of this embodiment, the spring constant of the spring 14 of the vibration power generation element 10 is adjusted so that all the resonance frequencies of the vibration power generation element 10 in the DC power generation unit 30 are the same (for example, 29.5 Hz). Yes. Further, the resonance frequency of the vibration power generation element of the power generation amount transition indicated by the line L2 is also 29.5 Hz.
　図６から理解できるように、電源装置６０には、制御部４０に対して４組の直流発電ユニット３０が並列に接続されているため、外部振動の周波数が共振周波数２９．５Ｈｚの近傍の領域（例えば、２９．５Ｈｚ～３０．１Ｈｚ）にある場合には、各振動発電素子１０の発電電力が重ね合わされ、電源装置６０としての発電量が、直流発電ユニットが一組の場合と比べて４倍程度の出力に増大されている。この結果、負荷５０での無線通信デバイス５１や加速度センサ５２による消費電力に対して、十分量の電力を電源装置６０が供給することが可能となる。 As can be understood from FIG. 6, in the power supply device 60, the four DC power generation units 30 are connected in parallel to the control unit 40, so that the external vibration frequency is in the vicinity of the resonance frequency of 29.5 Hz. (For example, 29.5 Hz to 30.1 Hz), the generated power of each vibration power generation element 10 is superimposed, and the power generation amount as the power supply device 60 is 4 as compared with the case where the DC power generation unit is one set. The output is increased to about twice. As a result, the power supply device 60 can supply a sufficient amount of power to the power consumed by the wireless communication device 51 and the acceleration sensor 52 at the load 50.
　また、外部振動周波数が共振周波数から若干外れた、上記近傍領域の周囲の領域（例えば、２８．６Ｈｚ～２９．５Ｈｚ、３０．１Ｈｚ～３１．０Ｈｚ）にある場合、やはり、電源装置６０の発電量は直流発電ユニットが一組の場合と比べて大きいが、その比率が直流発電ユニットが一組の場合を基準としたときの４倍を超えている。これは、電源装置６０では、４組の直流発電ユニット３０の制御を１つの制御部４０が行う構成となっており、制御部４０の負荷が各ユニットで分散されるのに対して、直流発電ユニットが一組の場合は１つの直流発電ユニットの制御を１つの制御部が行う構成となっているため、直流発電ユニットのユニット出力電力のうち、制御部４０によって消費される電力の占める比率が大きくなるからである。外部振動周波数が上記の周囲領域にある場合には、振動発電素子１０による発電電力が、外部振動周波数の近傍領域にある場合と比べて低くなるため、線Ｌ２で示すケースでは制御部４０の消費電力が及ぼす影響が大きくなり、図６に示す結果となる。 Further, when the external vibration frequency is slightly out of the resonance frequency and is in a region around the above-mentioned nearby region (for example, 28.6 Hz to 29.5 Hz, 30.1 Hz to 31.0 Hz), the power generation by the power supply device 60 is also performed. The amount is larger than that in the case of one set of DC power generation units, but the ratio is more than four times that in the case of a set of DC power generation units. This is because, in the power supply device 60, one set of control units 40 controls the four sets of DC power generation units 30, and the load of the control unit 40 is distributed among the units. When the unit is a set, since one control unit controls one DC power generation unit, the proportion of the power consumed by the control unit 40 in the unit output power of the DC power generation unit is Because it grows. When the external vibration frequency is in the surrounding area, the power generated by the vibration power generation element 10 is lower than that in the vicinity of the external vibration frequency. Therefore, in the case indicated by the line L2, the consumption of the control unit 40 The effect of electric power is increased, and the result shown in FIG. 6 is obtained.
　以上より、電源装置６０は、制御部４０に対して４組の直流発電ユニット３０を並列に接続する構成を採用することで、電源装置６０の発電量を増大させているとともに、外部振動周波数が、振動発電素子１０の共振周波数を若干外れた場合でも、効率的な直流出力を実現する。これにより、負荷５０を駆動する観点に立てば、対応できる外部振動の周波数領域を上記近傍領域から上記周辺領域まで拡大させ、また、発電量そのものも増大させることが可能となる。 As described above, the power supply device 60 employs a configuration in which four sets of DC power generation units 30 are connected in parallel to the control unit 40, thereby increasing the power generation amount of the power supply device 60 and reducing the external vibration frequency. Even when the resonant frequency of the vibration power generation element 10 is slightly deviated, an efficient direct current output is realized. Accordingly, from the viewpoint of driving the load 50, it is possible to expand the frequency region of external vibration that can be handled from the vicinity region to the peripheral region, and to increase the power generation amount itself.
＜変形例＞
　上記実施例においては、制御部４０に二次電池４２が設けられたが、当該二次電池は必ずしも必要ではない。二次電池が設けられない場合には、各直流発電ユニット３０のユニット出力電力がそのまま負荷５０に対して供給されることになる。また、各直流発電ユニット３０に逆流禁止回路２１が設けられたが、逆流による発電量低下への影響が無視し得る等の理由により、当該逆流禁止回路２１の設置を回避してもよい。 <Modification>
In the above embodiment, the secondary battery 42 is provided in the control unit 40, but the secondary battery is not necessarily required. When the secondary battery is not provided, the unit output power of each DC power generation unit 30 is supplied to the load 50 as it is. Moreover, although the backflow prohibition circuit 21 is provided in each DC power generation unit 30, installation of the backflow prohibition circuit 21 may be avoided because the influence of the backflow on the amount of power generation can be ignored.
　次に、本発明に係る電源装置６０の第２の実施例について説明する。本実施例では、４組の直流発電ユニット３０に含まれる振動発電素子１０ａ～１０ｄの共振周波数を、それぞれ２７．５Ｈｚ、２８．５Ｈｚ、２９．５Ｈｚ、３０．５Ｈｚとなるように、各振動発電素子１０のバネ１４のバネ定数が調整されている。そして、この場合の電源装置６０の発電量推移が、図７に線Ｌ３で示されている。また、図７には、直流発電ユニット３０を一組のみ有する電源装置の発電量推移（すなわち、図６で線Ｌ２で示された発電量推移）が、参考として線Ｌ４で示されている。なお、図７に示す発電量推移は、外部振動の加速度が０．１５Ｇの場合のものである。 Next, a second embodiment of the power supply device 60 according to the present invention will be described. In this embodiment, each vibration power generation is performed so that the resonance frequencies of the vibration power generation elements 10a to 10d included in the four sets of DC power generation units 30 are 27.5 Hz, 28.5 Hz, 29.5 Hz, and 30.5 Hz, respectively. The spring constant of the spring 14 of the element 10 is adjusted. The power generation amount transition of the power supply device 60 in this case is indicated by a line L3 in FIG. Further, in FIG. 7, the power generation amount transition (that is, the power generation amount transition indicated by the line L2 in FIG. 6) of the power supply apparatus having only one set of the DC power generation unit 30 is indicated by the line L4 as a reference. The power generation amount transition shown in FIG. 7 is for the case where the acceleration of external vibration is 0.15G.
　なお、振動発電素子１０ａ～１０ｄの共振周波数は、共振周波数が２９．５Ｈｚである振動発電素子１０ｃを基準として設定される。具体的には、共振周波数が２９．５Ｈｚである振動発電素子１０ｃ単独の発電量推移（すなわち、線Ｌ４で示される推移）の半値幅が約１Ｈｚであることを踏まえ、基準の２９．５Ｈｚから１Ｈｚずつずらして、上記の通り振動発電素子１０ａ、１０ｂ、１０ｄの共振周波数を２７．５Ｈｚ、２８．５Ｈｚ、３０．５Ｈｚとするものである。このように基準の発電量推移を半値幅ずつずらすことで、４つの直流発電ユニット３０のユニット出力電力は周波数領域において好適に重ねられ、以て電源装置６０の発電量推移において発電量が比較的大きくなる周波数領域を可及的に広く取得することが可能となる。例えば、図７で線Ｌ３で示す発電量推移では、発電量が１００μＷを超える周波数領域を、概ね２７．５Ｈｚ～３１．０Ｈｚと見定めることができる。 Note that the resonance frequency of the vibration power generation elements 10a to 10d is set with reference to the vibration power generation element 10c having a resonance frequency of 29.5 Hz. Specifically, based on the fact that the half-value width of the power generation amount of the vibration power generation element 10c alone having a resonance frequency of 29.5 Hz (that is, the transition indicated by the line L4) is about 1 Hz, from the reference of 29.5 Hz The resonance frequency of the vibration power generation elements 10a, 10b, and 10d is set to 27.5 Hz, 28.5 Hz, and 30.5 Hz as described above by shifting by 1 Hz. In this way, by shifting the reference power generation amount transition by half width, the unit output power of the four DC power generation units 30 is suitably overlapped in the frequency domain, and thus the power generation amount in the power generation amount transition of the power supply device 60 is relatively high. It becomes possible to acquire as large a frequency range as possible. For example, in the power generation amount transition indicated by the line L3 in FIG. 7, the frequency region where the power generation amount exceeds 100 μW can be determined as approximately 27.5 Hz to 31.0 Hz.
　ここで、図６で線Ｌ１で示される発電量推移（すなわち、振動発電素子１０ａ～１０ｄの共振周波数が全て２９．５Ｈｚの場合の推移）と、図７で線Ｌ３で示される発電量推移（すなわち、振動発電素子１０ａ～１０ｄの共振周波数がそれぞれ２７．５Ｈｚ、２８．５Ｈｚ、２９．５Ｈｚ、３０．５Ｈｚの場合の推移）とを、図８に、それぞれ線Ｌ５、Ｌ６で示す。更に、外部振動の加速度が０．０３Ｇのときの、すなわち図８での加速度の１／５のときの、振動発電素子１０ａ～１０ｄの共振周波数が全て２９．５Ｈｚの場合の発電量推移と、振動発電素子１０ａ～１０ｄの共振周波数がそれぞれ２７．５Ｈｚ、２８．５Ｈｚ、２９．５Ｈｚ、３０．５Ｈｚの場合の発電量推移を、図９に、それぞれ線Ｌ７、Ｌ８で示す。この０．０３Ｇの外部振動の加速度は、電源装置６０において振動発電が可能な最小の加速度として設定されるものである。 Here, the power generation amount transition indicated by the line L1 in FIG. 6 (that is, the transition when the resonance frequencies of the vibration power generation elements 10a to 10d are all 29.5 Hz) and the power generation amount transition indicated by the line L3 in FIG. That is, transitions when the resonant frequencies of the vibration power generation elements 10a to 10d are 27.5 Hz, 28.5 Hz, 29.5 Hz, and 30.5 Hz, respectively, are indicated by lines L5 and L6 in FIG. Furthermore, when the acceleration of the external vibration is 0.03 G, that is, when the acceleration in FIG. 8 is 1/5, the generation amount transition when the resonance frequencies of the vibration power generation elements 10a to 10d are all 29.5 Hz, Transitions of power generation when the resonant frequencies of the vibration power generation elements 10a to 10d are 27.5 Hz, 28.5 Hz, 29.5 Hz, and 30.5 Hz, respectively, are shown by lines L7 and L8 in FIG. The acceleration of 0.03G external vibration is set as the minimum acceleration at which the power generation device 60 can generate vibration and power.
　線Ｌ５、Ｌ６で示される発電量推移を比較して理解できるように、前者（線Ｌ５で示すケース）の場合は、外部振動周波数が設定されている共振周波数に近ければ比較的大きい発電量を得ることができるが、外部振動周波数が当該共振周波数よりも離れると発電量が低下してしまう。一方で、後者（線Ｌ６で示すケース）の場合は、上記の通り比較的広い周波数領域で、前者よりも発電量のピーク値は下がるものの、直流発電ユニット１つの場合の発電量よりも大きい発電量を得ることができ、負荷５０の駆動を安定的に行うことができる。この傾向は、図９に示すように外部振動の加速度が最小の場合も同じである。 As can be understood by comparing the power generation amount transitions indicated by the lines L5 and L6, in the former case (the case indicated by the line L5), if the external vibration frequency is close to the set resonance frequency, a relatively large power generation amount is obtained. Although it can be obtained, the amount of power generation is reduced when the external vibration frequency is separated from the resonance frequency. On the other hand, in the latter case (the case indicated by line L6), the power generation amount is larger than the power generation amount in the case of one DC power generation unit, although the peak value of the power generation amount is lower than the former in a relatively wide frequency range as described above. The amount can be obtained, and the load 50 can be driven stably. This tendency is the same even when the acceleration of the external vibration is minimum as shown in FIG.
　したがって、電源装置６０に前者の構成を採用するか後者の構成を採用するかについては、電源装置６０に付与される外部振動の周波数の状況に応じて適宜選択すればよい。また、付与される外部振動の周波数の状況において、特定の周波数成分が比較的高いことが分かっている場合には、例えば、４個の振動発電素子のうち、２個の振動発電素子については当該特定の周波数を共振周波数として設定し、他の２個の振動発電素子については、特定の周波数から半値幅分ずらした周波数をそれぞれの共振周波数として設定してもよい。具体的には、特定の周波数が２９．５Ｈｚの場合、振動発電素子１０ａ、１０ｂの共振周波数を２９．５Ｈｚとし、振動発電素子１０ｃ、１０ｄの共振周波数を２８．５Ｈｚ、３０．５Ｈｚとする。このようにすることで、効率的な振動発電を実現できる。 Therefore, whether to adopt the former configuration or the latter configuration for the power supply device 60 may be appropriately selected according to the frequency of external vibration applied to the power supply device 60. In addition, in the situation of the frequency of external vibration to be applied, when it is known that a specific frequency component is relatively high, for example, about two vibration power generation elements among four vibration power generation elements A specific frequency may be set as the resonance frequency, and for the other two vibration power generation elements, frequencies shifted from the specific frequency by the half-value width may be set as the respective resonance frequencies. Specifically, when the specific frequency is 29.5 Hz, the resonance frequency of the vibration power generation elements 10a and 10b is set to 29.5 Hz, and the resonance frequency of the vibration power generation elements 10c and 10d is set to 28.5 Hz and 30.5 Hz. In this way, efficient vibration power generation can be realized.
＜変形例＞
　上記の実施例では、振動発電素子が１つの場合の発電量推移の半値幅を考慮して、電源装置６０に含まれる各直流発電ユニット３０内の振動発電素子１０の共振周波数を決定したが、その態様に代えて、振動発電素子１０の共振周波数を、商用電源の周波数とされる５０Ｈｚ、６０Ｈｚに基づいて決定してもよい。商用電源からの供給電力により駆動されるモーター等から発生する振動、すなわち電源装置６０に付与される外部振動となり得る振動には、その商用電源の周波数の影響を受けたものが含まれる。したがって、振動発電素子１０の共振周波数を、商用電源の周波数とされる５０Ｈｚ、６０Ｈｚに基づいて決定することで、何れの周波数の商用電源が使用されても、効率的な振動発電を実現することが可能となる。 <Modification>
In the above embodiment, the resonance frequency of the vibration power generation element 10 in each DC power generation unit 30 included in the power supply device 60 is determined in consideration of the half width of the power generation amount transition in the case of one vibration power generation element. Instead of this aspect, the resonance frequency of the vibration power generation element 10 may be determined based on 50 Hz and 60 Hz as the frequencies of the commercial power source. The vibration generated from a motor or the like driven by the power supplied from the commercial power supply, that is, the vibration that can be external vibration applied to the power supply device 60 includes the one affected by the frequency of the commercial power supply. Therefore, by determining the resonance frequency of the vibration power generation element 10 based on 50 Hz and 60 Hz, which are the frequencies of the commercial power supply, efficient vibration power generation can be realized regardless of the frequency of the commercial power supply. Is possible.
　例えば、電源装置６０に含まれる各直流発電ユニット３０内の振動発電素子１０ａ、１０ｂの共振周波数を６０Ｈｚに基づいて決定し、振動発電素子１０ｃ、１０ｄの共振周波数を５０Ｈｚに基づいて決定してもよい。具体的には、前者の共振周波数、後者の共振周波数を、それぞれ６０Ｈｚ、５０Ｈｚの倍数とし、一例として、前者を３０Ｈｚ、後者を２５Ｈｚとしてもよい。その他には、前者、後者の組合せを、それぞれ、１５Ｈｚ、１２．５Ｈｚの組合せ、６０Ｈｚ、５０Ｈｚの組合せ、１２０Ｈｚ、１００Ｈｚの組合せとしてもよい。 For example, the resonance frequency of the vibration power generation elements 10a and 10b in each DC power generation unit 30 included in the power supply device 60 is determined based on 60 Hz, and the resonance frequency of the vibration power generation elements 10c and 10d is determined based on 50 Hz. Good. Specifically, the former resonance frequency and the latter resonance frequency may be multiples of 60 Hz and 50 Hz, respectively. For example, the former may be 30 Hz and the latter may be 25 Hz. In addition, the former and latter combinations may be 15 Hz, 12.5 Hz, 60 Hz, 50 Hz, 120 Hz, and 100 Hz, respectively.
　次に、電源装置６０を含むセンサモジュール７０の別の実施例について、図１０に基づいて説明する。図１０は、加速度センサ５２による加速度検出の対象物１００において、センサモジュール７０が設置された状態を示している。対象物１００においては、図１０に示すように段差が形成されている。振動発電素子３０は、外部振動が振動発電素子３０に適切に付与されなければ効率的な振動発電を行うことが難しい。そこで、このような段差を有する対象物において、センサモジュール７０を設置する場合、各振動発電素子３０が対象物１００に接触し、対象物１００から外部振動が適切に伝播してくるようにするために、当該センサモジュール７０は形成されている。 Next, another embodiment of the sensor module 70 including the power supply device 60 will be described with reference to FIG. FIG. 10 shows a state in which the sensor module 70 is installed in the acceleration detection target object 100 by the acceleration sensor 52. In the object 100, a step is formed as shown in FIG. It is difficult for the vibration power generation element 30 to perform efficient vibration power generation unless external vibration is appropriately applied to the vibration power generation element 30. Therefore, when the sensor module 70 is installed on an object having such a step, each vibration power generation element 30 comes into contact with the object 100 so that external vibrations can be appropriately propagated from the object 100. In addition, the sensor module 70 is formed.
　具体的には、本実施例のセンサモジュール７０は、形状が可変であるいわゆるフレキシブル基板８０の上面側と下面側のそれぞれに振動発電伝素子１０を含む直流発電ユニット３０がそれぞれ配置される。フレキシブル基板８０の上面側に、対象物１００の段差の上段に対応する直流発電ユニット３０ａ、３０ｂが配置され、フレキシブル基板８０の下面側には、対象物１００の段差の下段に対応する直流発電ユニット３０ｃ、３０ｄが配置されている。そして、各直流発電ユニット３０及び制御部４０、負荷５０とは、図４に示す電気的構成を形成するために、フレキシブル基板８０の表面又は内部で配線される。このようにセンサモジュール７０を構成し、フレキシブル基板８０の変形性も利用することで、各直流電源ユニット３０を段差形状を有する対象物１００に対して適切に配置することができる。 Specifically, in the sensor module 70 of the present embodiment, the DC power generation units 30 including the vibration power generation elements 10 are respectively arranged on the upper surface side and the lower surface side of the so-called flexible substrate 80 whose shape is variable. DC power generation units 30a and 30b corresponding to the upper steps of the object 100 are disposed on the upper surface side of the flexible substrate 80, and DC power generation units corresponding to the lower steps of the object 100 are disposed on the lower surface side of the flexible substrate 80. 30c and 30d are arranged. Each DC power generation unit 30, the control unit 40, and the load 50 are wired on the surface or inside of the flexible substrate 80 to form the electrical configuration shown in FIG. By configuring the sensor module 70 in this manner and also using the deformability of the flexible substrate 80, each DC power supply unit 30 can be appropriately arranged with respect to the object 100 having a step shape.
　また、図１０に示す場合において、対象物１００の段差上段で生じている振動の周波数と、段差下段で生じている振動の周波数が異なっている場合には、それぞれの振動周波数に合わせて、直流発電ユニット３０ａ、３０ｂ内の振動発電素子１０ａ、１０ｂの共振周波数、及び直流発電ユニット３０ｃ、３０ｄ内の振動発電素子１０ｃ、１０ｄの共振周波数を設定してもよい。 In the case shown in FIG. 10, when the frequency of the vibration generated in the upper step of the object 100 is different from the frequency of the vibration generated in the lower step of the object 100, the direct current is adjusted to the respective vibration frequency. The resonance frequency of the vibration power generation elements 10a and 10b in the power generation units 30a and 30b and the resonance frequency of the vibration power generation elements 10c and 10d in the DC power generation units 30c and 30d may be set.
　１・・・・可動部材
　１ａ・・・・エレクトレット群
　１ｂ・・・・可動基板
　１ｅ・・・・支持用溝
　２・・・・エレクトレット
　５・・・・固定部材
　５ａ・・・・電極群
　５ｂ・・・・固定基板
　６、７・・・・電極
　１０、１０ａ、１０ｂ、１０ｃ、１０ｄ・・・・振動発電素子
　１１・・・・筐体
　１１ａ・・・・側面
　１１ｂ・・・・底面
　１１ｄ・・・・側面
　１２・・・・支持用鋼球
　１３・・・・支持用鋼球
　１４・・・・バネ
　１５・・・・連結部
　２０、２０ａ、２０ｂ、２０ｃ、２０ｄ・・・・整流・平滑回路
　２１、２１ａ、２１ｂ、２１ｃ、２１ｄ・・・・逆流禁止回路
　３０、３０ａ、３０ｂ、３０ｃ、３０ｄ・・・・直流発電ユニット
　４０・・・・制御部
　５０・・・・負荷
　６０・・・・電源装置
　７０・・・・センサモジュール DESCRIPTION OF SYMBOLS 1 ... Movable member 1a ... Electret group 1b ... Movable substrate 1e ... Supporting groove 2 ... Electret 5 ... Fixed member 5a ... Electrode group 5b ··· Fixed substrate 6, 7 ··· Electrode 10, 10a, 10b, 10c, 10d ··· Vibration generator 11 ··· Case 11a · · · Side surface 11b · · · Bottom surface 11d ··· Side 12 ··· Steel ball for support 13 ······································ 15・ Smoothing circuit 21, 21a, 21b, 21c, 21d... Reverse current prohibition circuit 30, 30a, 30b, 30c, 30d... DC power generation unit 40. ... Power supply 70 ... Sensor module

Claims (8)

  1. 　制御部を介して、発電部からの発電電力を電力供給対象へ出力する電源装置であって、
    　前記発電部は、少なくとも、前記電源装置の外部からの外部振動によって振動発電を行う振動発電素子と、該振動発電素子の出力を整流する整流回路との組合せからなる直流発電ユニットを複数組含み、
    　前記複数の直流発電ユニットは前記制御部に対して並列に接続され、各直流発電ユニットにおいて前記整流回路を経たユニット出力電力が該制御部に並列に入力される、
    　電源装置。     A power supply device that outputs generated power from a power generation unit to a power supply target via a control unit,
    The power generation unit includes a plurality of DC power generation units each including a combination of a vibration power generation element that performs vibration power generation by external vibration from the outside of the power supply device and a rectifier circuit that rectifies the output of the vibration power generation element,
    The plurality of DC power generation units are connected in parallel to the control unit, and unit output power that has passed through the rectifier circuit in each DC power generation unit is input to the control unit in parallel.
    Power supply.
  2. 　前記複数の直流発電ユニットに含まれる前記振動発電素子のそれぞれは、前記外部振動の周波数が所定周波数であるときに、該振動発電素子の発電電力がピーク値を迎えるように形成され、
    　前記複数の直流発電ユニットには、前記所定周波数が異なる少なくとも２種類の前記振動発電素子が含まれる、
    　請求項１に記載の電源装置。     Each of the vibration power generation elements included in the plurality of DC power generation units is formed such that when the frequency of the external vibration is a predetermined frequency, the generated power of the vibration power generation element reaches a peak value,
    The plurality of DC power generation units include at least two types of vibration power generation elements having different predetermined frequencies.
    The power supply device according to claim 1.
  3. 　前記異なる所定周波数には、第１周波数と第２周波数が含まれ、
    　前記第１周波数は、前記第２周波数に対して、該第２周波数に対応する前記振動発電素子である第２発電素子による、振動周波数に対する発電量の推移の半値幅以上ずれ、且つ、該第１周波数に対応する前記振動発電素子である第１発電素子による、振動周波数に対する発電量の推移と、該第２発電素子に関する該推移とは互いに重なるように、該第１周波数と該第２周波数は設定される、
    　請求項２に記載の電源装置。     The different predetermined frequencies include a first frequency and a second frequency,
    The first frequency deviates from the second frequency by more than a half-value width of the transition of the power generation amount with respect to the vibration frequency by the second power generation element that is the vibration power generation element corresponding to the second frequency, and the first frequency The first frequency and the second frequency so that the transition of the power generation amount with respect to the vibration frequency by the first power generation element, which is the vibration power generation element corresponding to one frequency, and the transition regarding the second power generation element overlap each other. Is set,
    The power supply device according to claim 2.
  4. 　前記第１周波数は、前記第２周波数に対して、前記第２発電素子に関する前記推移の半値幅ずれるように、該第１周波数と該第２周波数は設定される、
    　請求項３に記載の電源装置。     The first frequency and the second frequency are set such that the first frequency is deviated from the second frequency by a half-value width of the transition related to the second power generation element.
    The power supply device according to claim 3.
  5. 　前記異なる所定周波数には、第１周波数と第２周波数が含まれ、
    　前記第１周波数及び前記第２周波数のそれぞれは、５０Ｈｚ及び６０Ｈｚの倍数とされる、
    　請求項２に記載の電源装置。     The different predetermined frequencies include a first frequency and a second frequency,
    Each of the first frequency and the second frequency is a multiple of 50 Hz and 60 Hz.
    The power supply device according to claim 2.
  6. 　前記複数の直流発電ユニットのそれぞれは、前記整流回路と前記制御部との間に、電流が該整流回路側に流れ込む逆流を禁止する逆流禁止回路を有する、
    　請求項１から請求項５の何れか１項に記載の電源装置。     Each of the plurality of DC power generation units includes a backflow prohibition circuit that prohibits a backflow of current flowing into the rectifier circuit side between the rectifier circuit and the control unit.
    The power supply device according to any one of claims 1 to 5.
  7. 　前記制御部は、前記複数の直流発電ユニットからの発電電力を蓄電する二次電池を有する、
    　請求項１から請求項６の何れか１項に記載の電源装置。     The control unit includes a secondary battery that stores generated power from the plurality of DC power generation units.
    The power supply device according to any one of claims 1 to 6.
  8. 　前記複数の直流発電ユニットのうち少なくとも一部の直流発電ユニットが、フレキシブル基板上に配置される、
    　請求項１から請求項７の何れか１項に記載の電源装置。     At least some of the DC power generation units among the plurality of DC power generation units are disposed on a flexible substrate.
    The power supply device according to any one of claims 1 to 7.
PCT/JP2015/074496 2015-08-28 2015-08-28 Power supply device WO2017037793A1 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11830352B1 (en) 2022-08-10 2023-11-28 International Business Machines Corporation Haptic vibration exposure control based on directional position of power recovery module

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JP2012206630A (en) * 2011-03-30 2012-10-25 Asahi Glass Co Ltd Mobile body
JP2013150387A (en) * 2012-01-17 2013-08-01 Kansai Univ Method for manufacturing electret, electret, and generator
WO2014069483A1 (en) * 2012-11-05 2014-05-08 旭硝子株式会社 Vibratory generator device and power source module
JP2014131418A (en) * 2012-12-28 2014-07-10 Omron Corp Oscillating power generator

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Publication number Priority date Publication date Assignee Title
JP2012206630A (en) * 2011-03-30 2012-10-25 Asahi Glass Co Ltd Mobile body
JP2013150387A (en) * 2012-01-17 2013-08-01 Kansai Univ Method for manufacturing electret, electret, and generator
WO2014069483A1 (en) * 2012-11-05 2014-05-08 旭硝子株式会社 Vibratory generator device and power source module
JP2014131418A (en) * 2012-12-28 2014-07-10 Omron Corp Oscillating power generator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11830352B1 (en) 2022-08-10 2023-11-28 International Business Machines Corporation Haptic vibration exposure control based on directional position of power recovery module

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