JP2014007919A - Recharging system, electronic device, and recharging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a recharging system which can correctly determine the degree of deterioration of a built-in power source without changing the configuration of an electronic device, and provide an electronic device and a recharging device.SOLUTION: A recharging system 100 comprises: an electronic device 1 which has a chargeable built-in power source 24; a recharge control unit 81 for controlling recharging of the built-in power source; a voltage detection unit 82 for detecting the voltage of the built-in power source 24; a recharging device 60 for supplying power to the built-in power source 24 through the charging control unit 81; and a determination unit 22a for calculating and determining a degree of deterioration C/Cin of the built-in power source 24 on the basis of ratio ΔVin/ΔV of voltage increase rate ΔVin which was acquired in the past to the voltage increase rate ΔV of the built-in power source 24 which is acquired based on the voltage V of the built-in power source 24 detected at the time of recharging a constant current. When the voltage V of the built-in power source 24 detected by the voltage detection unit 82 is within a voltage increase rate acquisition range R0, the determination unit 22a obtains the voltage increase rate ΔV of the built-in power source 24.

Description

  The present invention relates to a charging system, an electronic device, and a charging device.

  Various charging devices, charging control devices, and the like have been developed for charging a rechargeable built-in power source (also referred to as a capacitor, a battery, a secondary battery, and a power storage device) built in an electronic device (for example, Patent Document 1). -4 etc.).

  In such a charging device or the like, for example, as shown in FIGS. 14A and 14B, the voltage V [V] of the built-in power supply reaches a target voltage V1 (hereinafter sometimes referred to as an upper limit voltage V1). The constant current charging is performed so that the charging current I is constant, and the charging is performed so that the voltage V of the built-in power supply becomes constant when the voltage V of the built-in power supply reaches the target voltage V1. There is a case where it is configured to include a charge control unit that switches to voltage charging and controls charging to the internal power source. Moreover, such a charge control part may be provided in the electronic device side.

  By the way, when the built-in power supply deteriorates, the internal resistance increases or the full charge capacity decreases. Therefore, the built-in power supply is preliminarily predicted for the replacement cycle from the use temperature environment, the voltage to be used, and the use frequency, and is replaced according to the replacement cycle, or the deterioration of the built-in power supply is determined in real time and based on the determination result. (See, for example, Patent Document 5).

  In Patent Document 5, as a technique for determining deterioration of a built-in power supply (capacitor) in real time, the deterioration of the built-in power supply is determined from the rising slope of the voltage V of the built-in power supply (capacitor voltage V when the built-in power supply is a capacitor). At the same time, there has been proposed a method for determining that the built-in power supply has deteriorated by comparing the slope of the voltage increase of the voltage V of the built-in power supply with a predetermined threshold.

  When the full charge capacity (capacitor capacity when the built-in power supply is a capacitor) decreases due to deterioration, the amount of charge that can be charged decreases. Therefore, when the charge current I is the same, for example, a broken line is shown in FIG. As described above, the voltage V of the built-in power supply increases rapidly. Therefore, when the slope of the voltage increase of the voltage V of the built-in power supply is larger than a predetermined threshold, it can be determined that the built-in power supply has deteriorated.

JP 2009-77501 A JP 2008-104270 A JP 2007-306654 A JP 2006-33917 A JP 2008-43174 A

  By the way, when the built-in power supply is a lithium ion capacitor, for example, as shown in FIG. 15, as the voltage V of the built-in power supply increases (that is, as it goes to the right side in the graph of FIG. 15), There is a tendency that the difference between the slope of the increase in voltage V, that is, the voltage increase rate ΔV [V / min], and the voltage increase rate ΔV in a normal product is reduced. In other words, as the voltage V of the built-in voltage V becomes lower (that is, as it goes to the left in the graph of FIG. 15), the voltage rise rate ΔV in the built-in power supply that has deteriorated, and the voltage rise rate ΔV in the normal product There is a tendency for the difference to be greater.

  And, when the usage is such that charging is performed after the voltage range close to the lower limit voltage V0 of the capacitor that is the built-in power supply is used up, the difference in slope due to the difference in the degree of deterioration is remarkable when charging the built-in power supply. The voltage increase rate ΔV can be acquired during constant current charging in the low voltage region that appears, and the degree of deterioration of the built-in power supply can be accurately determined.

  However, in the actual usage situation of electronic devices, it is rare to use up to a low voltage region, and rather, it is often used such that charging and discharging are repeated in a high voltage region.

  Therefore, for example, in order to determine the degree of deterioration of the built-in power supply, before charging the built-in power supply, the charge is intentionally discharged from the built-in power supply and the voltage V of the built-in power supply is lowered, and then charged. It can be considered that the configuration is such that the degree of deterioration of the built-in power supply is well determined.

  However, in such a configuration, the power stored in the internal power supply is discharged unnecessarily, and the electronic device is intentionally discharged to temporarily reduce the voltage V of the internal power supply. It will have to be configured to be able to set the mode. In addition, since charging is performed after the voltage V of the built-in power supply is once greatly reduced, the charging time becomes very long, and various inconveniences such as the user being unable to use the electronic device during a long charging time occur.

  The present invention has been made in view of the above problems, and provides a charging system, an electronic device, and a charging device that can accurately determine the degree of deterioration of a built-in power supply without changing the configuration of the electronic device. The purpose is to provide.

In order to solve the above problems, the charging system, the electronic device, and the charging device of the present invention include:
An electronic device with a built-in rechargeable power supply,
A charge control unit that controls charging to the built-in power supply so as to perform constant current charging until the voltage of the built-in power supply reaches a target voltage;
A voltage detector for detecting the voltage of the internal power supply;
A charging device for supplying power to the built-in power supply via the charging control unit;
Based on the voltage of the internal power supply detected by the voltage detection unit during the constant current charging by the charge control unit, the voltage increase rate of the internal power supply is acquired, and the acquired voltage increase rate and the voltage increase acquired in the past A determination unit that calculates and determines the degree of deterioration of the built-in power supply based on a ratio to the rate;
With
The determination unit is a voltage region in which the voltage of the built-in power source detected by the voltage detection unit is lower than the target voltage and higher than an allowable lower limit voltage, and according to the degree of deterioration of the built-in power source. The voltage increase rate of the built-in power supply is acquired when the ratio is in a voltage region where the ratio is significantly different.

  According to the charging system, the electronic apparatus, and the charging device of the system as in the present invention, the determination unit can clearly calculate the degree of deterioration of the built-in power supply according to the progress of deterioration of the built-in power supply. . In addition, the calculation and determination processing of the deterioration degree of the built-in power supply can be performed using each function unit existing in the electronic device without making any changes to the electronic device.

  Thus, according to the charging system, electronic device, and charging device of the system as in the present invention, the internal power supply is deteriorated by using each function unit existing in the electronic device without making any changes to the electronic device. It is possible to calculate the degree by quantifying it and accurately determine how much deterioration of the built-in power supply has progressed. Even when electronic devices are used in such a way that charging and discharging are repeated in the high voltage range without using the built-in power supply to the low voltage range, the built-in power supply is used according to the progress of deterioration of the built-in power supply. It is possible to accurately determine the degree of deterioration of the built-in power supply by clearly distinguishing and calculating the degree of deterioration.

It is a perspective view which shows the external appearance of the radiographic imaging apparatus as an example of an electronic device. It is sectional drawing which follows the XX line of FIG. It is a block diagram showing the circuit structure of the radiographic imaging apparatus of FIG. It is a perspective view which shows the external appearance of the cradle as an example of a charging device. It is the perspective view which showed the state by which the radiographic imaging apparatus was inserted in the cradle shown in FIG. It is the figure which showed typically the internal structure of the cradle of FIG. 4, and has shown the state which is going to insert a radiographic imaging apparatus in a cradle. It is the figure which showed typically the internal structure of the cradle of FIG. 4, and has shown the state by which the radiographic imaging apparatus was inserted in the cradle. It is a block diagram showing the composition of a charge system roughly. It is a graph explaining voltage rise rate acquisition area | region R0. 10 is a graph showing an example of a plurality of voltage regions when the voltage increase rate acquisition region R0 shown in FIG. 9 is divided into a plurality of voltage regions R1 to R3. It is a graph showing the profile at the time of plotting the degradation degree of the calculated internal power supply for every cycle time of charge. FIG. 12 is an enlarged view of the graph of FIG. 11 for explaining the estimation of the replacement time of the built-in power supply when the degree of deterioration of the built-in power supply suddenly increases. It is a block diagram showing a modification of the composition of a charging system roughly, and is a figure showing the case where a charging control circuit etc. are provided in a cradle which is a charging device. It is a graph showing the time transition of (A) voltage and (B) current of a built-in power supply in constant current charge and constant voltage charge. It is a graph showing the relationship between the voltage of a built-in power supply, and a voltage increase rate.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. However, embodiments to which the present invention is applicable are not limited to this. Further, the present invention is not limited to the illustrated example.

  Hereinafter, a case where the electronic apparatus is a radiographic imaging apparatus and the charging apparatus is a cradle will be described, but the present invention is not limited to this mode.

  In the following, a so-called indirect radiation image capturing apparatus that includes a scintillator or the like as a radiation image capturing apparatus and converts an emitted radiation into an electromagnetic wave of another wavelength such as visible light to obtain an electric signal will be described. However, the present invention can also be applied to a so-called direct type radiographic imaging apparatus in which radiation is directly detected by a radiation detection element without using a scintillator or the like.

  Furthermore, although the case where the radiographic imaging device is a portable radiographic imaging device will be described, the present invention is also applicable to a stationary radiographic imaging device formed integrally with a support base or the like. Can do.

  In the present embodiment, a case where the charge control circuit 81 (see FIG. 8 described later) is provided in the radiographic image capturing apparatus 1 as an electronic device will be described.

[Configuration example of radiation imaging apparatus]
First, a configuration example of the radiation image capturing apparatus 1 that is an example of an electronic apparatus will be described. FIG. 1 is a perspective view showing an appearance of the radiation image capturing apparatus 1. 2 is a cross-sectional view taken along line XX in FIG.

  In the present embodiment, the radiographic image capturing apparatus 1 is a cassette type radiographic image capturing apparatus in which a so-called flat panel detector is configured to be portable, and is used for radiographic image capturing to detect radiation and respond to the dose of the radiation. Image data is generated and acquired.

  As shown in FIGS. 1 and 2, the radiation image capturing apparatus 1 is configured by housing a sensor panel SP including a scintillator 3 and a substrate 4 in a housing 2.

  In the present embodiment, a hollow rectangular tube-shaped housing body 2A having a radiation incident surface R in the housing 2 is formed of a material such as a carbon plate or plastic that transmits radiation. The housing 2 is formed by closing openings on both sides of the housing main body 2A with cover members 2B and 2C. Instead of forming the casing 2 as such a so-called monocoque type, for example, a so-called lunch box type formed of a front plate and a back plate can be used.

  In the present embodiment, a power switch 37, a changeover switch 38, and the like are disposed on the cover member 2B on one side of the housing 2. In the present embodiment, the cover member 2B has an indicator 40 composed of an LED or the like for displaying the state of the built-in power supply 24 (see FIG. 2 or FIG. 3 to be described later), the operating state of the radiographic imaging device 1, and the like. Has been placed.

  In the present embodiment, the cover member 2B is provided with a connector 39 that can be connected to a connector 71 of the cradle 60 (see FIGS. 6 and 7 described later). The connector 39 is connected to the connector 71 of the cradle 60 so that power is supplied from the cradle 60 as a charging device to the radiation image capturing apparatus 1.

  Although not shown, in the present embodiment, the cover member 2C on the other side of the housing 2 has an antenna device 41a (see FIG. 8 described later) for wireless communication with an external device. For example, it is provided by being embedded in the cover member 2C.

  As shown in FIG. 2, a base 31 is disposed inside the housing 2 on the lower side of the substrate 4 via a thin lead plate or the like (not shown). A PCB substrate 33 on which electronic components 32 and the like are disposed, a built-in power supply 24 and the like are attached to the base 31.

  Further, a glass substrate 34 for protecting the substrate 4 and the scintillator 3 on the radiation incident surface R side is disposed. Moreover, in this embodiment, the buffer material 35 for preventing that they collide between the sensor panel SP and the side surface of the housing | casing 2 is provided.

  Although not shown, a plurality of radiation detection elements 7 made of photodiodes or the like are arranged in a two-dimensional shape (matrix shape) on the detection portion P of the substrate 4. Each radiation detection element 7 is connected with a thin film transistor (hereinafter referred to as TFT) 8, a scanning line 5, a signal line 6, a bias line 9, and the like as switching means. The detection part P of the substrate 4 is provided so as to face the scintillator 3.

  Next, the circuit configuration of the radiation image capturing apparatus 1 will be described. FIG. 3 is a block diagram showing an equivalent circuit of the radiation image capturing apparatus 1 according to this embodiment.

  A plurality of radiation detection elements 7 are two-dimensionally arranged on the substrate 4 to form a detection unit P. In addition, a bias line 9 is connected to the second electrode 7 b of each radiation detection element 7, and each bias line 9 is bound to a connection 10 and connected to a bias power supply 14. The bias power supply 14 applies a reverse bias voltage to the second electrode 7 b of each radiation detection element 7 via the connection 10 and each bias line 9.

  In the scanning drive circuit 15, an on voltage or an off voltage is supplied from the power supply circuit 15a to the gate driver 15b via the wiring 15c. And each radiation detection element is switched by switching the voltage applied to each line L1-Lx of the scanning line 5 by the gate driver 15b between ON voltage and OFF voltage, and switching each TFT8 ON state and OFF state. 7 is configured to perform a process of reading image data from the image data 7.

  Each signal line 6 is connected to each readout circuit 17 formed in the readout IC 16. The readout circuit 17 includes an amplification circuit 18 and a correlated double sampling circuit 19. An analog multiplexer 21 is further provided in the read IC 16. Further, the reading IC 16 is connected to the control means 22 via the A / D conversion unit 20.

  Then, for example, in the process of reading the image data from each radiation detection element 7, the TFT 8 connected to the scanning line 5 to which the on voltage is applied from the gate driver 15b is turned on and turned on. Charge is discharged from the radiation detection element 7 connected to the TFT 8 to the signal line 6, and the discharged charge is converted into a charge voltage by the amplifier circuit 18 of the readout circuit 17.

  Then, the correlated double sampling circuit 19 provided on the output side of the amplifier circuit 18 calculates the difference between the output values from the amplifier circuit 18 before and after the charge is released from the radiation detection element 7, and the calculated difference is analog Output as value image data. Then, the output analog value image data is sequentially transmitted to the A / D conversion unit 20 via the analog multiplexer 21, and is converted into digital value image data by the A / D conversion unit 20 and output. The data are sequentially stored in the storage unit 23. In this way, the image data reading process from each radiation detection element 7 is sequentially performed.

  The control means 22 controls the operation of each functional unit of the radiographic image capturing apparatus 1. Specifically, the control means 22 includes a main body control unit 22a (see FIG. 8 described later) configured by a CPU (Central Processing Unit) and the like, a ROM (Read Only Memory, not shown), and a RAM (Random Access Memory) 22b. (See FIG. 8 described later), an input / output interface (not shown) and the like are configured by a computer connected to a bus, an FPGA (Field Programmable Gate Array), and the like. The control means 22 may be configured with a dedicated control circuit.

  The control means 22 is connected to a storage means 23 composed of SRAM (Static RAM), SDRAM (Synchronous DRAM) or the like. In the present embodiment, the control unit 22 is also connected to the communication unit 41 having the antenna device 41a, the signal processing unit 25 (see FIG. 8 described later), the power switch 37, the changeover switch 38, the connector 39, the indicator 40, and the like. Has been.

  Here, the communication unit 41 transmits / receives various signals to / from an external device such as the console 101. Specifically, the communication unit 41 can communicate with an external device such as the console 101 in a wireless manner via a wireless access point (not shown) by the antenna device 41a. The communication unit 41 communicates with an external device such as the console 101 in a wired manner via the cradle 60 when the connector 39 of the radiation image capturing apparatus 1 and the connector 71 of the cradle 60 are connected. It is also possible to do.

  In addition, the signal processing unit 25 performs predetermined signal processing on the image data read from each radiation detection element 7 and converted from analog value data to digital value data by the A / D conversion unit 20, thereby obtaining an image. Convert the data into a format suitable for sending to the outside.

  That is, in this embodiment, image data read from each radiation detection element 7 and converted from analog value data to digital value data by the A / D conversion unit 20 is transmitted to the outside by the signal processing unit 25. The data is converted into data in a format suitable for the data, and then transmitted from the communication unit 41 to an external device such as the console 101.

  In the present embodiment, the control means 22 is connected to a built-in power supply 24 for supplying power to the function sections such as the control means 22, the scanning drive circuit 15, the readout circuit 17, the storage means 23, and the bias power supply 14. Has been.

  In the present embodiment, a lithium ion capacitor (LIC) is used as the built-in power supply 24, but the present invention is not limited to this. The built-in power supply 24 may be an electric storage device such as an electric double layer capacitor, a normal battery, a secondary battery, or the like as long as it can be charged.

  Although not shown in FIG. 3, in this embodiment, the built-in power supply 24 is connected to a charge control circuit 81 (see FIG. 8 described later) that controls charging of the built-in power supply 24. This point will be described in detail later.

[Cradle configuration example]
Next, a configuration example of the cradle 60 that is an example of the charging device will be described.

  FIG. 4 is a perspective view showing the external appearance of the cradle 60. FIG. 5 is a perspective view showing a state in which the radiation image capturing apparatus 1 is inserted into the cradle 60 shown in FIG. 6 and 7 are diagrams schematically showing the internal configuration of the cradle 60. FIG. 6 shows a state in which the radiographic imaging apparatus 1 is to be inserted into the cradle 60, and FIG. 7 shows the cradle. 60 shows a state in which the radiation image capturing apparatus 1 is inserted.

  As shown in FIGS. 4 and 5, the cradle 60 includes a casing 61 that is formed in a substantially rectangular parallelepiped shape and has an opening 61 a on the upper surface, and a covering member 62 that covers the opening 61 a of the casing 61. . Various switches 63 for operating the cradle 60 are provided at one end of the housing 61.

  As shown in FIGS. 6 and 7, the housing 61 is provided with a device housing portion 64 that extends in the longitudinal direction of the housing 61 and houses the radiographic imaging device 1 in the vertical direction. The casing 61 houses various electronic components 66 arranged on the substrate 65.

  The electronic component 66 is supplied with an AC voltage supplied from an external AC power source, for example, in order to supply a constant DC voltage to the charging control circuit 81 (see FIG. 8 to be described later) of the radiation imaging apparatus 1. A stabilized power supply circuit 66a (see FIG. 8 to be described later) including an AC / DC converter or the like for conversion to the above is included.

  Further, the device housing portion 64 includes a front side wall member 67 and a back side wall member 68 that constitute the side wall of the device housing portion 64. An insertion port 69 (see FIG. 6) into which the radiographic imaging device 1 is inserted is formed by the upper end portion of the front side wall member 67 and the upper end portion of the back side wall member 68. The radiographic imaging device 1 is configured to be inserted between the front side wall member 67 and the back side wall member 68 from the insertion port 69.

  A guide member 67 a that guides the radiographic imaging apparatus 1 into the apparatus housing part 64 is attached to the inner side of the front side wall member 67. A buffer member 68 a is provided on the entire inner surface of the back side wall member 68 in the longitudinal direction.

  The device housing portion 64 has an inner dimension in the thickness direction that matches the outer dimension in the thickness direction of the radiation imaging apparatus 1. An apparatus holding means 70 for temporarily holding the radiographic imaging apparatus 1 inserted from the insertion opening 69 is disposed near the insertion opening 69 in the apparatus housing portion 64.

  A connector 71 on the cradle 60 side that can be connected to the connector 39 on the radiographic imaging apparatus 1 side is disposed on the bottom of the apparatus housing 64. The connector 71 on the cradle 60 side is electrically connected to the electronic component 66 via a cable (not shown).

  In the present embodiment, as shown in FIG. 6, when the radiographic image capturing apparatus 1 is inserted into the cradle 60 obliquely, the lid member 72 that is pushed by the radiographic image capturing apparatus 1 and covers the insertion port 69 is a covering member. Retreat to the back side (left side in the figure) along 62.

  When the radiographic image capturing apparatus 1 oriented in the substantially vertical direction is inserted from the insertion port 69, the cover member 2B on the side where the connector 39 of the radiographic image capturing apparatus 1 is provided once comes into contact with the apparatus holding means 70. Then, as shown in FIG. 7, the apparatus holding means 70 is rotated downward so that the radiographic image capturing apparatus 1 is accommodated in the apparatus accommodating portion 64.

  As described above, since the inner dimension in the thickness direction of the device accommodating portion 64 is a dimension that matches the outer dimension in the thickness direction of the radiographic image capturing apparatus 1, the radiographic image accommodated in the apparatus accommodating portion 64. The connector 39 on the photographing apparatus 1 side is configured to be connected in a state where it is appropriately positioned at a position where it can be automatically connected to the connector 71 on the cradle 60 side.

[Configuration example of charging system]
Next, the configuration of the charging system 100 according to the present embodiment will be described. Hereinafter, the operation of the charging system 100 and the radiation image capturing apparatus 1 according to the present embodiment will also be described. FIG. 8 is a block diagram schematically showing the configuration of the charging system 100.

  As shown in FIG. 8, in the present embodiment, a voltage detection circuit 82 and a power supply circuit 83 are provided between the built-in power supply 24 and each functional unit in the radiographic image capturing apparatus 1. The voltage detection circuit 82 functions as a voltage detection unit that detects the voltage V of the built-in power supply 24, that is, the charging voltage V charged in the built-in power supply 24. In addition, the power supply circuit 83 appropriately converts and adjusts the voltage value and the like so that the power supplied from the built-in power supply 24 is suitable for each functional unit of the supply destination.

  Further, as shown in FIG. 8, in the present embodiment, a charging control circuit 81 is provided between the connector 39 and the built-in power supply 24 in the radiographic image capturing apparatus 1. The charging control circuit 81 performs constant current charging until the voltage V of the built-in power supply 24 reaches the target voltage V1 (see FIG. 14A. For example, the rated voltage of the built-in power supply 24). When the target voltage V1 is reached, it switches to constant voltage charging and functions as a charge control unit that controls charging to the built-in power supply 24.

  In the present embodiment, the main body control unit 22 a of the control unit 22 included in the radiographic image capturing apparatus 1 is built in based on the voltage V of the built-in power supply 24 detected by the voltage detection circuit 82 during constant current charging by the charge control circuit 81. The voltage increase rate ΔV of the power supply 24, that is, the voltage increase value per unit time is acquired. It is also possible to define the voltage increase rate as the time required for charging for the unit increase of the voltage V.

  The main body control unit 22a calculates and determines the degree of deterioration of the built-in power supply based on the ratio between the acquired voltage increase rate ΔV and the previously acquired voltage increase rate ΔVold. That is, in the present embodiment, the main body control unit 22a functions as a determination unit that determines the degree of deterioration of the built-in power supply 24.

  Hereinafter, the determination process of the deterioration degree of the built-in power supply 24 in the main body control unit 22a which is a determination unit will be specifically described.

  In the present embodiment, the main body control unit 22a uses the built-in power supply 24 as the past voltage increase rate ΔV, for example, at the time of production of the radiographic imaging device 1 that is an electronic device, at the time of factory shipment, or at the introduction of a facility to a hospital or the like. When the constant current charging is performed, the voltage V of the built-in power supply 24 detected by the voltage detection circuit 82 is monitored, and the voltage increase rate ΔV [V / min] is set as an increase value of the voltage V per unit time such as 1 minute. It is acquired and stored in the RAM 22b.

  Hereinafter, the voltage increase rate ΔV acquired at the time of factory shipment or the like is referred to as an initial voltage increase rate ΔVin.

  The same applies to the acquisition of the voltage increase rate ΔV during charging of the built-in power supply 24 after the start of use of the radiographic imaging apparatus 1, but when the voltage increase rate ΔV is acquired as described above, FIG. As shown, in the voltage region where the voltage V of the built-in power supply is high, the difference in the voltage increase rate ΔV is small between the case where the deterioration is advanced and the case where the deterioration is not advanced. This makes it difficult to determine the degree of deterioration based on the voltage increase rate ΔV.

  Therefore, in the present embodiment, the characteristics appearing in FIG. 15, that is, an intermediate voltage (for example, 3 [V]) between the upper limit voltage V1 (for example 4 [V]) and the lower limit voltage V0 (for example 2 [V]) of the built-in power supply 24 are shown. V]) in the voltage range from a slightly higher voltage to the lower limit voltage V0, the characteristic that the difference between the voltage increase rate ΔV in the built-in power supply 24 and the voltage increase rate ΔV in the normal product becomes large is utilized.

  Hereinafter, this voltage region is referred to as a voltage increase rate acquisition region. This voltage increase rate acquisition region is set as a voltage region such as a voltage region R0 shown in FIG. 9 representing the same graph as FIG. That is, the voltage increase rate acquisition region R0 is a voltage region that is lower than the target voltage V1 that is the upper limit voltage V1 and higher than the allowable lower limit voltage V0, and the voltage increases according to the degree of deterioration of the built-in power supply 24. It is defined as a voltage region in which the rate ΔV is significantly different.

  When the voltage V of the built-in power supply 24 detected by the voltage detection circuit 82 is within the voltage increase rate acquisition region R0, the main body control unit 22a, which is a determination unit, determines the voltage of the built-in power supply 24 as described above. An increase rate ΔV is acquired.

  Conversely, in the present embodiment, the main body control unit 22a, for example, has a voltage region slightly higher than 3 [V] in the example shown in FIG. 9 (that is, the right side of the voltage increase rate acquisition region R0 in FIG. 9). The voltage increase rate ΔV of the built-in power supply 24 is obtained in a voltage region in which the difference between the voltage increase rates ΔV when the degree of deterioration of the built-in power supply 24 is different, as shown in FIG. Do not process.

  On the other hand, as can be seen from FIG. 9, the voltage increase rate ΔV does not become a constant value in both cases, whether the deterioration of the internal power supply 24 is advanced or not, and the voltage of the internal power supply 24 The value varies according to the magnitude of V.

  Therefore, for example, as shown in FIG. 10, when the voltage increase rate acquisition region R0 is divided into a plurality of voltage regions R1, R2, R3 according to the voltage V of the built-in power supply 24, for example, it is acquired at the time of one charge. Even in this case, the voltage increase rate ΔV acquired in each of the voltage regions R1, R2, and R3 usually has different values.

  Therefore, as shown in FIG. 10, the voltage increase rate acquisition region R0 is divided into a plurality of voltage regions (for example, voltage regions R1, R2, R3) according to the voltage V of the built-in power supply 24, and is a determination unit. It is desirable that the main body control unit 22a is configured to acquire the voltage increase rate ΔV for each divided voltage region, and to calculate the degree of deterioration of the built-in power source based on them, as will be described later.

  If comprised in this way, in the radiographic imaging apparatus 1 which is an electronic device in this embodiment, for example, when the built-in power supply 24 is charged without performing radiographic imaging much, the higher voltage region R1 is used. The voltage increase rate ΔV is acquired.

  In addition, when the radiographic image capturing apparatus 1 is used for a long time or when continuous imaging is performed, the power of the built-in power supply 24 is consumed more. Therefore, the voltage region R2 and the voltage region which are lower voltage regions are consumed. Charging is performed using the voltage of R3 as the charging start voltage. When the charging is performed from the voltage region R2, the voltage increase rate ΔV is obtained in the voltage regions R2 and R1, and when the charging is performed from the voltage region R3, in the voltage regions R3, R2, and R1, respectively. Acquisition etc. will be performed.

  FIG. 10 illustrates the case where the voltage increase rate acquisition region R0 is divided into three voltage regions R1, R2, and R3. However, the method of dividing the voltage increase rate acquisition region R0 into a plurality of voltage regions is illustrated here. However, the voltage increase rate acquisition region R0 may be divided into two voltage regions, or may be configured to be divided into four or more voltage regions.

  Hereinafter, a case where the voltage increase rate acquisition region R0 is set as one voltage region as illustrated in FIG. 9 will be described. However, as described above, the voltage increase rate acquisition region R0 is divided into a plurality of voltage regions R1 to R3, and the processing described below is performed in each voltage region R1 to R3, and the processing result of each voltage region R1 to R3. May be used in comparison. With this configuration, as described above, it is possible to acquire the voltage increase rate ΔV during constant current charging in the lower voltage regions R2 and R3. There is an advantage that each process can be performed with high accuracy.

  Further, when the voltage increase rate acquisition region R0 is divided into a plurality of voltage regions, the initial voltage increase rate ΔVin acquired at the time of factory shipment of the radiographic imaging device 1 as an electronic device as described above, Each voltage region is acquired in advance and stored in the RAM 22b.

  In the present embodiment, the main body control unit 22a, which is a determination unit, is configured to perform the following processes using the voltage increase rate ΔV acquired as described above. The main body control unit 22a, which is a determination unit, does not have to be configured to perform all of the processes described below, and performs only one of the processes or only a plurality of processes. It is also possible to configure.

[Built-in power supply deterioration judgment process]
When the main body control unit 22a, which is the determination unit, acquires the voltage increase rate ΔV during constant current charging of the built-in power supply 24 as described above, the acquired voltage increase rate ΔV and the voltage increase rate ΔV acquired in the past are the above. The deterioration degree of the built-in power supply 24 is calculated and determined based on the ratio ΔVin / ΔV with the initial voltage increase rate ΔVin.

  In the present embodiment, what is the ratio (ratio) of the capacity C of the built-in power supply 24 at the present time compared to the capacity Cin of the radiographic imaging apparatus 1 that is an electronic device at the time of factory shipment or the like. Represents the degree of deterioration of the built-in power supply 24. As is well known, there is a relationship Q = C · V between the charge Q, the capacitance C, and the voltage V, and this relationship can be transformed to C = Q / V.

  During constant current charging, the current I supplied to the built-in power supply 24 is constant (see FIG. 14B). Since the current I is the charge Q supplied to the built-in power supply 24 per unit time, if the current I is constant, the charge Q supplied to the built-in power supply 24 per unit time is also constant.

Therefore, the ratio C / Cin between the current capacity C of the internal power supply 24 and the capacity Cin of the internal power supply 24 in the initial state is:
C / Cin = (Q / ΔV) / (Q / ΔVin)
∴C / Cin = ΔVin / ΔV (1)
That is, it can be calculated as the ratio ΔVin / ΔV of the initial voltage increase rate ΔVin acquired in the initial state and stored in the RAM 22a with respect to the voltage increase rate ΔV acquired at the present time.

  Therefore, when the main body control unit 22a, which is a determination unit, acquires the voltage increase rate ΔV during the constant current charging of the built-in power supply 24 as described above, it reads the initial voltage increase rate ΔVin from the RAM 22a and acquires the acquired voltage increase rate ΔV. And the initial voltage increase rate ΔVin are substituted into the above equation (1), and the degree of deterioration C / Cin of the built-in power supply 24 at the present time is calculated and determined.

  With this configuration, the deterioration degree C / Cin of the built-in power supply 24 can be set as a numerical value by using each function unit existing in the electronic device without making any changes to the radiographic imaging device 1 that is the electronic device. It is possible to accurately determine how much the deterioration of the internal power supply 24 has been calculated.

  In this embodiment, the main body control unit 22a, which is a determination unit, notifies the determined degree of deterioration C / Cin of the built-in power supply 24 to a radiologist or the like via the deterioration degree notification unit.

  For example, the indicator 40 (see FIGS. 1 and 8) of the radiographic imaging device 1 that is an electronic device can be used as the deterioration degree notification unit. In this case, the main body control unit 22a, which is a determination unit, sets, for example, one LED of the indicator 40 to be blue or green if the determined deterioration degree C / Cin of the built-in power supply 24 is greater than 70%. The internal power supply 24 is lit in a color indicating that the deterioration of the built-in power supply 24 has not progressed so much.

  Further, the main body control unit 22a as the determination unit, for example, if the determined deterioration degree C / Cin of the built-in power supply 24 is a value greater than 60% and equal to or less than 70%, the same LED of the indicator 40 is changed to yellow, etc. The built-in power supply 24 is lit in a color indicating that the deterioration of the built-in power supply 24 is progressing, and the degree of deterioration of the built-in power supply 24 is notified to a radiologist.

  With this configuration, it is possible to accurately notify a radiographer or the like how much the built-in power supply 24 of the radiographic imaging apparatus 1 that is an electronic device has deteriorated.

  Note that, for example, the console 101 (see FIG. 8) is used as the deterioration degree notification unit, and for example, the deterioration degree C / Cin of the built-in power supply 24 calculated and determined is displayed as a percentage on a display unit (not shown) of the console 101, for example. It is also possible to configure. In that case, for example, according to the numerical value range of the deterioration degree C / Cin of the built-in power supply 24, the numerical value to be displayed is displayed in a colored manner in the same manner as described above so as to call the radiologist or the like. It is also possible.

[Process to notify that the internal power supply has reached the time for replacement]
As an extension of the determination process of the deterioration level of the built-in power supply, for example, the main body control unit 22a, which is a determination unit, replaces the built-in power supply 24 such that the determined deterioration degree C / Cin of the built-in power supply 24 is 60%, for example. If the internal power supply 24 has reached the replacement time, it is configured to notify the radiologist or the like via the replacement time notifying unit when the degree of deterioration has been set in advance as a numerical value serving as a guideline for Is possible.

  Also in this case, as the replacement time notification unit, for example, the indicator 40 of the radiographic image capturing apparatus 1 that is an electronic device can be used. In this case, for example, the main body control unit 22a that is the determination unit lights the same LED of the indicator 40 in a color such as red, which indicates that the replacement of the built-in power supply 24 has progressed and the replacement time has been reached.

  Also in this case, for example, the console 101 is used as the replacement time notification unit. For example, the deterioration degree C / Cin of the built-in power supply 24 determined by calculation on the display unit of the console 101 is displayed in red or the like. It is also possible to configure such that the radiologist or the like is accurately notified that the built-in power supply 24 has reached the replacement time by, for example, displaying a percentage.

  With this configuration, when the built-in power supply 24 of the radiographic imaging apparatus 1 that is an electronic device has deteriorated and has reached the replacement time, it is accurately detected, and the built-in power supply 24 has reached the replacement time. It is possible to accurately notify the radiologist or the like that A radiographer or the like can accurately replace the built-in power supply 24 that has reached the replacement time with a new one.

[Internal power supply replacement time estimation process]
On the other hand, when the deterioration degree C / Cin of the built-in power supply 24 calculated every time the built-in power supply 24 is charged as described above is plotted for each charge cycle time Tc, the deterioration degree C / Cin of the built-in power supply 24 is shown in FIG. It has been found by the present inventors that there is a case where it changes as shown in the image.

  That is, the deterioration degree C / Cin of the built-in power supply 24 may gradually decrease at a constant rate from the initial 100% state (that is, the deterioration progresses) (see the dotted line in FIG. 11). Depending on the built-in power supply 24, the use of the built-in power supply 24 may progress, and the degree of deterioration C / Cin of the built-in power supply 24 may suddenly increase from the cycle time Tc when charging is performed. In other words, it has been found that the deterioration of the built-in power supply 24 may begin to advance rapidly.

  In such a case, the built-in power supply 24 reaches the replacement time τ earlier than when the deterioration degree C / Cin of the built-in power supply 24 decreases at a constant rate. Therefore, if the replacement time τ of the built-in power supply 24 is not watched carefully, the built-in power supply 24 that has already reached the replacement time is erroneously determined to have not yet reached the replacement time and continues to be used.

  For this reason, for example, even if radiographic imaging is performed using the radiographic imaging device 1, various problems such as inability to perform radiographic imaging may occur. Therefore, when the built-in power supply 24 is used as the power supply of the electronic device, it is necessary to accurately grasp the replacement time τ of the built-in power supply 24.

  In the present embodiment, the main body control unit 22a, which is a determination unit, acquires the voltage increase rate ΔV in the determination process of the degree of deterioration of the built-in power supply performed at the time of constant current charging of the built-in power supply 24. Therefore, it is possible to estimate the replacement time τ of the built-in power supply 24 using this.

  Specifically, every time the main body control unit 22a, which is a determination unit, calculates the deterioration degree C / Cin of the built-in power supply 24 in the above-described determination process of the deterioration degree of the built-in power supply, the RAM 22b stores the calculated built-in power supply 24. The degree of deterioration C / Cin is stored. Then, the deterioration degree C / Cin_last of the built-in power supply 24 calculated at the previous charging is read out from the history of the deterioration degree C / Cin of the built-in power supply 24 stored in the RAM 22b.

Then, for example, the difference ΔC / Cin between the deterioration degree C / Cin of the built-in power supply 24 calculated at the current charging and the deterioration degree C / Cin_last of the built-in power supply 24 calculated at the previous charging is calculated according to the following equation (2). To do.
ΔC / Cin = C / Cin_last−C / Cin (2)

  Then, when the deterioration of the built-in power supply 24 has not progressed so much, as shown in FIG. 11, the deterioration degree C / Cin of the built-in power supply 24 gradually decreases, so that the calculated difference ΔC / Cin ( Or its absolute value (the same shall apply hereinafter)) falls within the numerical range set to a small value. However, when the deterioration of the built-in power supply 24 progresses and, as described above, the degree of deterioration of the deterioration degree C / Cin of the built-in power supply 24 suddenly increases, the difference ΔC / Cin between the deterioration degrees C / Cin of the built-in power supply 24 described above. Becomes larger and falls outside the above numerical range.

  Therefore, the main body control unit 22a serving as a determination unit, for example, every time the deterioration degree C / Cin of the built-in power supply 24 is calculated by the above-described determination process of the deterioration degree of the built-in power supply, the built-in power supply calculated from the RAM 22b during the previous charging. The deterioration degree C / Cin_last of 24 is read, and the difference ΔC / Cin is calculated.

  Then, when the calculated difference ΔC / Cin becomes equal to or greater than a threshold ΔC / Cin_th set to a small value in advance, for example, it is determined that the degree of decrease in the deterioration degree C / Cin of the built-in power supply 24 has suddenly increased. Then, from the degree of deterioration C / Cin of the internal power supply 24 at that time and the calculated difference ΔC / Cin, for example, how many more times charging is performed, as shown in FIG. 12, the internal power supply 24 reaches the replacement time τ. The replacement time τ of the built-in power supply 24 can be estimated.

  At this time, when the deterioration degree C / Cin of the built-in power supply 24 which is a guide for replacement of the built-in power supply 24 is 60%, for example, the difference between the deterioration degree C / Cin of the built-in power supply 24 and 60% at the present time is calculated as described above. By dividing by the difference ΔC / Cin, it is possible to estimate how many times charging can be performed, that is, the replacement time τ of the built-in power supply 24.

  Further, instead of calculating the replacement time τ of the built-in power supply 24 by simple division as described above, for example, based on the history of the deterioration degree C / Cin of the built-in power supply 24 stored in the RAM 22b, as shown in FIG. A profile of the deterioration degree C / Cin of the built-in power supply 24 is formed, and the profile, in particular, the profile of the portion where the degree of deterioration of the deterioration degree C / Cin of the built-in power supply 24 starts to suddenly increase is approximated by a curve, etc. The replacement time τ of the built-in power supply 24 can be estimated.

  With this configuration, the replacement time τ of the built-in power supply 24 is accurately estimated using each function unit existing in the electronic device without making any changes to the radiographic imaging device 1 that is the electronic device. It becomes possible.

  In this embodiment, the main body control unit 22a, which is a determination unit, notifies the estimated replacement time τ of the built-in power supply 24 to a radiologist or the like via the replacement time notification unit.

  As the replacement time notification unit, for example, a display unit (not shown) of the console 101 (see FIG. 8) can be used. In this case, the main body control unit 22 a serving as a determination unit transmits, for example, information on the estimated replacement time τ of the built-in power supply 24 to the console 101. Then, the console 101 displays the replacement time τ of the built-in power supply 24 estimated by the main body control unit 22a, which is a determination unit, on the display unit.

  With this configuration, the estimated replacement time τ of the built-in power supply 24 of the radiographic imaging apparatus 1 that is an electronic device can be accurately notified to a radiologist or the like. Then, the radiographer or the like can take necessary measures such as obtaining a new built-in power supply 24 to be replaced with the old built-in power supply 24.

[Built-in power supply abnormality judgment processing]
Further, the technique shown in the process for estimating the replacement time of the built-in power supply can be applied to the abnormality determination process for the built-in power supply 24.

  That is, if any abnormality occurs in the built-in power supply 24, the calculated deterioration degree C / Cin of the built-in power supply 24 greatly deviates from the profile as shown in FIG. When the built-in power supply 24 becomes abnormal, at least the use of the radiographic imaging apparatus 1 which is an electronic device using the built-in power supply 24 is stopped, and appropriate measures such as replacement of the built-in power supply 24 are taken. It is necessary to take.

  Therefore, in the abnormality determination process of the built-in power supply 24, the main body control unit 22a, which is a determination unit, acquires the voltage acquired during the constant current charging of the built-in power supply 24, as in the case of the above-described estimation process of the replacement time of the built-in power supply. Each time the deterioration degree C / Cin of the built-in power supply 24 is calculated based on the increase rate ΔV and the deterioration degree C / Cin of the built-in power supply 24 is calculated, the calculated deterioration degree C / Cin of the built-in power supply 24 is stored in the RAM 22b. Save it.

  Then, for example, every time the degree of deterioration C / Cin of the built-in power supply 24 is calculated, the degree of deterioration C / Cin_last of the built-in power supply 24 calculated at the previous charging is read from the RAM 22b, and the above equation (2) is followed. The difference ΔC / Cin is calculated. For example, when the absolute value of the calculated difference ΔC / Cin greatly fluctuates beyond a preset threshold ΔC / Cin_th2 as a value that can be taken in the case of a normal built-in power supply 24, the built-in power supply 24 is abnormal. It can be configured to determine that there is.

  When the built-in power supply 24 is normal, the deterioration degree C / Cin of the built-in power supply 24 should change smoothly as shown in FIG. 11, for example, but the deterioration degree C / Cin of the built-in power supply 24 is If it becomes abnormally large or small beyond that range, it should be considered that the built-in power supply 24 has become abnormal.

  In the present embodiment, by configuring as described above, it is possible to accurately determine whether or not the internal power supply 24 is abnormal based on the calculated deterioration degree C / Cin of the internal power supply 24.

  In the present embodiment, when it is determined that the built-in power supply 24 is abnormal, the main body control unit 22a that is a determination unit notifies the radiation engineer or the like via the abnormality notification unit. ing.

  As the abnormality notification unit, for example, an indicator 40 (see FIG. 1 or FIG. 8) of the radiographic imaging device 1 which is an electronic device can be used. In this case, when the main body control unit 22a, which is a determination unit, determines that the built-in power supply 24 is abnormal, for example, one LED of the indicator 40 is lit in a color indicating abnormality such as red. In addition, for example, the LED can be flashed to alert the radiologist or the like.

  Further, for example, the console 101 (see FIG. 8) is used as the abnormality notification unit, and when it is determined that the built-in power supply 24 is abnormal, for example, the fact is displayed on the display unit (not shown) of the console 101 in a specific color. It is also possible to configure to display by coloring or the like.

  With this configuration, when the built-in power supply 24 of the radiographic imaging device 1 that is an electronic device is abnormal, it is possible to accurately notify the radiologist and the like, and to the radiologist It is possible to stop using the radiographic imaging apparatus 1 that is an electronic device using the built-in power supply 24 and take appropriate measures such as replacement of the built-in power supply 24.

  As described above, according to the charging system 100 and the radiographic imaging apparatus 1 as an electronic apparatus according to the present embodiment, the main body control unit 22a of the radiographic imaging apparatus 1 that is a determination unit is a charging control that is a charging control unit. During constant current charging by the circuit 81, the voltage increase rate ΔV of the built-in power supply 24 is acquired based on the voltage V of the built-in power supply 24 detected by the voltage detection circuit 82 which is a voltage detection unit, and the acquired voltage increase rate ΔV and the past Based on the ratio ΔVin / ΔV with the acquired voltage increase rate ΔVin, the degree of deterioration C / Cin of the built-in power supply 24 is calculated and determined.

  At that time, the main body control unit 22a, which is a determination unit, determines that the voltage V of the built-in power supply 24 detected by the voltage detection circuit 82 is lower than the target voltage V1 (that is, the upper limit voltage 1) and higher than the allowable lower limit voltage V0. Within a certain voltage region, and within the voltage region where the ratio ΔVin / ΔV is significantly different depending on the degree of deterioration C / Cin of the built-in power supply 24, that is, within the above-described voltage increase rate acquisition region R0 (see FIG. 9). In some cases, the voltage increase rate ΔV of the built-in power supply 24 is obtained.

  Therefore, the main body control unit 22a, which is a determination unit, can calculate the degree of deterioration C / Cin of the built-in power supply 24 by clearly distinguishing according to the progress of deterioration of the built-in power supply 24. Further, the calculation and determination processing of the deterioration degree C / Cin of the built-in power supply 24 is performed by using each function unit existing in the electronic device without making any changes to the radiographic image capturing apparatus 1 that is the electronic device. Is possible.

  As described above, according to the charging system 100 and the radiographic imaging apparatus 1 as an electronic apparatus according to the present embodiment, the radiographic imaging apparatus 1 that is an electronic apparatus does not have any changes, and the existing electronic equipment is not changed. Using each functional unit, the degree of deterioration C / Cin of the built-in power supply 24 is calculated and calculated, and it is possible to accurately determine how much the deterioration of the built-in power supply 24 has progressed.

  Even in a case where the electronic device is used such that charging and discharging are repeated in a high voltage region without using the built-in power source 24 to a low voltage region, depending on the progress of deterioration of the built-in power source 24. The degree of deterioration C / Cin of the built-in power supply 24 can be clearly distinguished and numerically calculated to accurately determine how much deterioration of the built-in power supply 24 has progressed.

  The built-in power supply 24 differs in full charge capacity, charging characteristics, etc. depending on the type (model, etc.), and the relationship between the voltage increase rate ΔV and the voltage V of the built-in power supply 24 (see, for example, FIG. 9) Usually, the tendency varies depending on the type of the built-in power supply 24 and the like. Therefore, the voltage increase rate acquisition region R0 is not limited to the voltage region as shown in FIG. 9, but is set to an appropriate voltage region according to the type of the built-in power supply 24 and the like.

  Further, when the voltage increase rate acquisition region R0 is set without being divided into a plurality of voltage regions R1 to R3 as in the above embodiment, the voltage increase rate acquisition region R0 is further divided into a plurality of voltage regions R1 to R3. In any case, it is possible to configure the threshold value or the like in each of the above processes as a function of the voltage V of the built-in power supply 24.

  That is, for example, in the above-mentioned “estimation process of the replacement time of the built-in power supply”, as described above, the deterioration degree C / Cin of the built-in power supply 24 calculated at the time of the current charging and the built-in power supply 24 calculated at the previous charging time. The difference ΔC / Cin with respect to the degree of deterioration C / Cin_last is calculated according to the above equation (2), and when the calculated difference ΔC / Cin is equal to or greater than the threshold value ΔC / Cin_th (see FIG. 12), the replacement time of the built-in power supply 24 τ is estimated.

  Therefore, for example, the threshold value ΔC / Cin_th serving as the determination criterion can be set in advance as a function of the voltage V of the built-in power supply 24. In this case, the main body control unit 22a, which is a determination unit, performs [determination process of the deterioration degree of the built-in power supply 24] that is a basis for calculating the deterioration degree C / Cin of the built-in power supply 24 during the current charging. The threshold value ΔC / Cin_th set as a function of the voltage V of the built-in power supply 24 is calculated based on the voltage V of the built-in power supply 24 at the time when the voltage increase rate ΔV is acquired at the time of constant current charging of the built-in power supply 24.

  Then, it is configured to determine whether or not the calculated difference ΔC / Cin is equal to or greater than the calculated threshold value ΔC / Cin_th. In this case, if the calculated difference ΔC / Cin is equal to or greater than the calculated threshold value ΔC / Cin_th, the above-mentioned [Internal power supply replacement time estimation process] is performed, and otherwise, [Built-in power supply replacement time]. Is not performed.

  Further, for example, the threshold value ΔC / Cin_th2 in [Built-in power supply abnormality determination process] may be set as a function of the voltage V of the built-in power supply 24. Also in this case, the main body control unit 22a, which is a determination unit, performs [determination process of the deterioration degree of the built-in power supply 24], which is the basis of the [determination process of built-in power supply], and the voltage rises when the built-in power supply 24 is charged with constant current. Based on the voltage V of the internal power supply 24 at the time of obtaining the rate ΔV, the threshold value ΔC / Cin_th2 set as a function of the voltage V of the internal power supply 24 is calculated.

  Then, the difference ΔC / Cin between the deterioration degree C / Cin of the built-in power supply 24 calculated this time and the deterioration degree C / Cin_last of the built-in power supply 24 calculated at the previous charging is calculated according to the above equation (2), and the calculated difference If the absolute value of ΔC / Cin greatly fluctuates beyond the threshold value ΔC / Cin_th2 calculated as described above, the built-in power supply 24 is determined to be abnormal.

  Further, it is possible to configure the threshold values and the like related to the processes other than those described above as a function of the voltage V of the built-in power supply 24. For example, in the above-mentioned [processing for notifying that the internal power source has reached the replacement time], etc., the internal power source 24 reaches the replacement time τ when the determined deterioration degree C / Cin of the internal power source 24 is reduced to 60%. However, it is also possible to configure such that 60% is set as a function of the voltage V of the built-in power supply 24, for example.

  As described above, if the threshold value in each process is set as a function of the voltage V of the built-in power supply 24, the voltage increase rate ΔV of the built-in power supply 24 is set as shown in FIG. The voltage of the internal power supply 24 that is not necessarily constant with respect to the voltage V of the power supply 24 and that changes characteristically according to the voltage V of the internal power supply 24, at least in the voltage increase rate acquisition region R0. It is possible to accurately set a threshold value or the like according to V, and it is possible to perform accurate processing according to the voltage increase rate ΔV of the built-in power supply 24 that changes according to the voltage V of the built-in power supply 24.

  On the other hand, in the above-described embodiment, the case where the indicator 40 of the radiographic image capturing apparatus 1 that is an electronic device or the display unit (not shown) of the console 101 is used as the deterioration degree notification unit, the replacement time notification unit, and the abnormality notification unit has been described. In addition to this, for example, a display unit (not shown) is provided in the cradle 60 (see FIG. 8), or a display unit is provided in an imaging room where radiographic imaging using the radiographic imaging apparatus 1 is performed. It is also possible to configure to notify by displaying or the like.

  Furthermore, in the above-described embodiment, the case where the charging control circuit 81 (see FIG. 8 described later) is provided in the radiographic imaging device 1 as an electronic device has been described. However, for example, as shown in FIG. 13, a charging control circuit 81 as a charging control unit may be provided in the cradle 60 that is a charging device.

  In this case, for example, the charge control circuit 81 can be provided on a portion of the board 65 inside the casing 61 (see FIG. 7 and the like) of the cradle 60 in which various electronic components 66 are stored.

  As described above, when the charging control circuit 81 as the charging control unit is provided in the cradle 60 as the charging device, the charging control circuit 81 is configured to function also as a determination unit that determines the degree of deterioration of the built-in power supply 24. It is also possible to provide a control unit or the like that functions as a determination unit in the cradle 60 that is a charging device.

  In FIG. 13, the voltage detection circuit 82 as the voltage detection unit is also provided in the cradle 60 that is a charging device. However, when the charge control circuit 81 as the charge control unit is provided in the cradle 60 as the charging device, the voltage detection circuit 82 as the voltage detection unit may be configured to be provided in the radiographic imaging device 1 as the electronic device. Is possible. Moreover, it is also possible to comprise so that it may provide in the cradle 60 which is a charging device.

  In the case where the voltage detection circuit 82 is provided in the cradle 60, for example, the voltage detection circuit 82 is provided on a portion of the board 65 inside the casing 61 (see FIG. 7 and the like) of the cradle 60 in which various electronic components 66 are accommodated. It is possible to provide.

  Here, when the charging control circuit 81 serving as a charging control unit is provided in the cradle 60 that is a charging device, for example, the type of the built-in power supply 24 built in the radiographic imaging device 1 is included in the radiographic imaging device 1 that is an electronic device. It comprises so that the thing which carries the identification information for identifying may be provided. The cradle 60 is provided with identification information acquisition means for acquiring identification information from the radiographic image capturing apparatus 1.

  Further, in the cradle 60, the identification information of the built-in power supply 24 built in the radiographic imaging device 1 that can be inserted into the cradle 60, and the above-described initial voltage increase acquired at the time of factory shipment of the built-in power supply 24 of the identification information. Necessary information such as the rate ΔVin is stored in advance.

  Then, on the cradle 60 side, an initial voltage increase rate ΔVin or the like corresponding to the identification information acquired by the identification information acquisition unit is extracted, and each of the above processes is performed based on the extracted initial voltage increase rate ΔVin or the like. It is also possible to configure as described above.

  Further, for example, the cradle 60 communicates with the radiographic image capturing apparatus 1 via the connector 71 on the cradle 60 side and the connector 39 on the radiographic image capturing apparatus 1 side, and the radiographic image capturing apparatus 1 is built in. It is also possible to configure to acquire identification information for identifying the type of the built-in power supply 24.

  In the above-described embodiment, the case where the electronic apparatus is the radiation image capturing apparatus 1 and the charging apparatus is the cradle 60 has been described. However, the present invention can also be applied to notebook computers, mobile phones, portable information terminals, and the like as long as the electronic device has a built-in rechargeable power supply 24. The present invention can also be applied to those charging devices.

  Needless to say, the present invention is not limited to the above-described embodiments and modifications, and can be appropriately changed without departing from the gist of the present invention.

1 Radiation imaging equipment (electronic equipment)
22a Main body control unit (determination unit)
24 Built-in power supply 40 Indicator (deterioration degree notification unit, replacement time notification unit, abnormality notification unit)
60 Cradle (charging device)
81 Charge control circuit (charge control unit)
82 Voltage detection circuit (voltage detection unit)
100 Charging system 101 Console (deterioration degree notification unit, replacement time notification unit, abnormality notification unit)
C / Cin Degree of degradation of built-in power supply R0 Voltage increase rate acquisition area (voltage area)
R1 to R3 Multiple voltage regions V Built-in power supply voltage V1 Target voltage ΔC / Cin Difference ΔV Voltage increase rate ΔVin Voltage acquisition rate ΔVin / ΔV ratio τ acquired in the past τ Internal power supply replacement time

Claims (15)

An electronic device with a built-in rechargeable power supply,
A charge control unit that controls charging to the built-in power supply so as to perform constant current charging until the voltage of the built-in power supply reaches a target voltage;
A voltage detector for detecting the voltage of the internal power supply;
A charging device for supplying power to the built-in power supply via the charging control unit;
Based on the voltage of the internal power supply detected by the voltage detection unit during the constant current charging by the charge control unit, the voltage increase rate of the internal power supply is acquired, and the acquired voltage increase rate and the voltage increase acquired in the past A determination unit that calculates and determines the degree of deterioration of the built-in power supply based on a ratio to the rate;
With
The determination unit is a voltage region in which the voltage of the built-in power source detected by the voltage detection unit is lower than the target voltage and higher than an allowable lower limit voltage, and according to the degree of deterioration of the built-in power source. And a voltage increase rate of the built-in power supply is acquired when the ratio is in a voltage range where the ratio is significantly different.   The determination unit divides the voltage of the built-in power supply detected by the voltage detection unit into a plurality of voltage regions, and calculates the degree of deterioration of the built-in power supply based on the ratio for each of the divided voltage regions. The charging system according to claim 1. A deterioration degree notification unit for notifying the deterioration degree of the built-in power supply;
The charging system according to claim 1, wherein the determination unit causes the deterioration degree notification unit to notify the determined deterioration degree of the built-in power supply. A replacement time notification unit for notifying that the built-in power supply has reached the replacement time,
The determination unit notifies the replacement time notification unit that the built-in power source has reached the replacement time when the calculated deterioration level of the built-in power supply has decreased to a predetermined deterioration level set in advance. The charging system according to any one of claims 1 to 3, wherein:   The determination unit is configured to store a history of the calculated degree of deterioration of the built-in power supply every time the degree of deterioration of the built-in power supply is calculated, and estimates the replacement time of the built-in power supply based on the history The charging system according to any one of claims 1 to 4, wherein: A replacement time notification unit for notifying that the built-in power supply has reached the replacement time,
The charging system according to claim 5, wherein the determination unit causes the replacement time notification unit to notify the estimated replacement time of the built-in power source.   The determination unit is configured to save a history of the calculated degree of deterioration of the built-in power supply every time the degree of deterioration of the built-in power supply is calculated. When the difference between the deterioration level of the built-in power supply calculated at the time of charging the built-in power supply in the previous period exceeds a normal range estimated from the history, it is determined that the built-in power supply is abnormal. The charging system according to any one of claims 1 to 6. An abnormality notification unit for notifying that the built-in power supply is abnormal,
The charging system according to claim 7, wherein when the determination unit determines that the built-in power supply is abnormal, the determination unit notifies the abnormality notification unit to that effect.   The charging system according to claim 1, wherein the charging control unit is provided in the electronic device.   The charging system according to claim 1, wherein the charging control unit is provided in the charging device.   The charging system according to claim 1, wherein the built-in power source is a lithium ion capacitor.   The charging system according to any one of claims 1 to 11, wherein the electronic device is a radiographic imaging device.   The charging system according to any one of claims 1 to 12, wherein the charging device is a cradle. In electronic devices with a built-in rechargeable power supply,
A charge control unit that controls charging to the built-in power supply so as to perform constant current charging until the voltage of the built-in power supply reaches a target voltage;
A voltage detector for detecting the voltage of the internal power supply;
A charging device for supplying power to the built-in power supply via the charging control unit;
Based on the voltage of the internal power supply detected by the voltage detection unit during the constant current charging by the charge control unit, the voltage increase rate of the internal power supply is acquired, and the acquired voltage increase rate and the voltage increase acquired in the past A determination unit that calculates and determines the degree of deterioration of the built-in power supply based on a ratio to the rate;
With
The determination unit is a voltage region in which the voltage of the built-in power source detected by the voltage detection unit is lower than the target voltage and higher than an allowable lower limit voltage, and according to the degree of deterioration of the built-in power source. When the ratio is in a voltage range where the ratio is significantly different, the voltage increase rate of the built-in power supply is acquired. In a charging device that supplies power to a built-in power supply built in an electronic device,
A charge control unit that controls charging to the built-in power supply so as to perform constant current charging until the voltage of the built-in power supply reaches a target voltage;
A voltage detector for detecting the voltage of the internal power supply;
A charging device for supplying power to the built-in power supply via the charging control unit;
Based on the voltage of the internal power supply detected by the voltage detection unit during the constant current charging by the charge control unit, the voltage increase rate of the internal power supply is acquired, and the acquired voltage increase rate and the voltage increase acquired in the past A determination unit that calculates and determines the degree of deterioration of the built-in power supply based on a ratio to the rate;
With
The determination unit is a voltage region in which the voltage of the built-in power source detected by the voltage detection unit is lower than the target voltage and higher than an allowable lower limit voltage, and according to the degree of deterioration of the built-in power source. And a voltage increase rate of the built-in power supply is acquired when the ratio is in a voltage range where the ratio is significantly different.

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