JP5826395B2 - Device identification device and device identification system - Google Patents

Description

  The present invention relates to a device identification device and a device identification system.

  Background art in this technical field is disclosed in Japanese Patent Laid-Open No. 2010-181159 (Patent Document 1). In this gazette, the problem is to “provide an inexpensive and simple method for identifying an energy consuming appliance”, and “the method for identifying an energy consuming appliance is an energy consumption system in which a plurality of energy consuming appliances are installed. At the time of starting or ending the operation of the consumer appliance, grasp the difference between the work rate immediately before performing the operation and the work rate in the steady state after performing the operation, create a work rate change amount database, and When a change in work rate is detected in the consumption system, the amount of change in the work rate and the work rate change amount data stored in the work rate change amount database are collated, and energy is actually consumed from the collation result. Identifying energy consuming appliances "and identifying operating devices and operating modes from measured power consumption patterns and presenting them to the user , Promote energy-saving devices have been proposed.

JP 2010-181159 A

  In order to specify a device and an operation mode based on a power consumption pattern as in Patent Document 1, it is necessary to register in advance what power consumption pattern each operation mode of each device is.

  However, if there are multiple devices of the same type among the above devices, a similar power consumption pattern will be detected from the devices of the same type, so multiple devices of the same type should be identified by the power consumption pattern. I can't.

  Accordingly, an object of the present invention is to provide a device identification device and a device identification method capable of discriminating each of a plurality of the same type devices and their operation modes even when there are a plurality of the same type devices.

  In order to achieve the above object, for example, the configuration described in the claims is adopted.

  When registering a waveform pattern for each operation mode of an electrical device in the device identification device, by registering information on usage time / use season, even if there are multiple devices of the same type, if the usage time trend is different Can be identified.

It is a block diagram which shows the structure of the apparatus identification device concerning Example 1 of this invention. It is a figure which shows the example of installation of an apparatus identification device. It is a flowchart of the apparatus information registration process before an operation start. It is a flowchart of a measurement process. It is a flowchart of an operation mode name registration process. It is a flowchart at the time of displaying an operation condition after an operation start. It is a flowchart of a process which presents a device information registration recommended time zone. It is a flowchart of the apparatus information registration process after an operation start. It is a figure which shows the change of an electric current waveform. It is a figure which shows the start screen at the time of apparatus information registration. It is a figure which shows the apparatus selection screen at the time of apparatus information registration. It is a figure which shows the apparatus name registration screen at the time of apparatus information registration. It is a figure which shows the measurement start screen at the time of apparatus information registration. It is a figure which shows the screen during measurement at the time of apparatus information registration. It is a figure which shows the measurement result screen at the time of apparatus information registration. It is a figure which shows the operation mode name input screen at the time of apparatus information registration. It is a figure which shows the operation mode name input screen at the time of apparatus information registration. It is a figure which shows the measurement start screen at the time of the registration confirmation at the time of apparatus information registration. It is a figure which shows the screen during measurement at the time of registration confirmation at the time of apparatus information registration. It is a figure which shows the registration confirmation screen at the time of apparatus information registration. It is a figure which shows the registration continuation inquiry screen at the time of apparatus information registration. It is a figure which shows the additional registration screen of the registered apparatus at the time of apparatus information registration. It is a figure which shows the additional registration screen of the registered apparatus at the time of apparatus information registration. It is a figure which shows the setting screen of the use time / use season at the time of apparatus information registration. It is a figure which shows the setting screen of the utilization time at the time of apparatus information registration. It is a figure which shows the setting screen of the use season at the time of apparatus information registration. It is a figure which shows the screen of an operation condition display. It is a figure which shows the screen of an operation condition display. It is a figure which shows the example of a current waveform. It is a figure which shows the example of a current waveform. It is a figure which shows the current waveform which (a) and (b) superimposed. It is an example of a waveform pattern list. It is an example of a measurement history. It is an example of apparatus information. It is a block diagram which shows the structure of the apparatus identification device concerning Example 2 of this invention. It is a block diagram which shows the structure of the apparatus identification device concerning Example 3 of this invention. It is a block diagram which shows the structure of the apparatus identification device concerning Example 4 of this invention. It is a figure which shows the example of the measured electric power and time. It is an example of the apparatus information of the air conditioner 1 and the air conditioner 2. FIG. It is a figure which shows the example of the median of the measured waveform pattern and the median of the utilization time of the air conditioner 1 and the air conditioner 2. FIG. It is a figure which shows the example of the screen of the estimated operation condition display.

  FIG. 1 shows a connection diagram of the device identification apparatus according to the first embodiment of the present invention. In the device identification apparatus 100, as shown in FIG. 1, a display device 102, an instruction input unit 103, an I / O interface 104, a CPU 105, a memory 106, a timer 107, an auxiliary storage interface 108, and a measurement interface 119 are coupled by a bus. Has been. In addition, a power meter 101 is provided outside the device identification apparatus 100 and is connected to a measurement interface 119 of the device identification apparatus 100. The wattmeter 101 is connected between the AC power source 001 and the electric device 002 to be measured.

  The wattmeter 101 can measure alternating current voltage and current at intervals of about 10000 times per second, and quantifies the voltage / current waveform. According to an instruction from the device identification apparatus 100, at least the time corresponding to one period of alternating current, The voltage and current are measured at the time intervals and the measurement results are transmitted to the device identification apparatus 100. The wattmeter 101 transmits one measurement result in response to one measurement instruction according to an instruction from the device identification apparatus 100, or performs measurement and transmission of the measurement result at a constant interval until there is a stop instruction. Like that.

  The display device 102 displays information on a display mechanism such as an LCD (Liquid Crystal Display) or an organic EL (Electroluminescence), and displays a series of operation screens such as a data registration screen and an identification result screen.

  The instruction input unit 103 is a device that receives an operation instruction from a user, and is a pointing device represented by a mouse, a touch panel integrated with the display device 102, or the like in addition to buttons.

  For example, the buttons displayed on the display device 102 are operated using a pointing device such as a mouse of the instruction input unit 103 or a touch panel.

  The display device 102 and the instruction input unit 103 are connected to other parts by an I / O interface 104.

  A CPU (Central Processing Unit) 105 executes a control program 110 loaded in the memory 106 and controls each unit of the device identification apparatus 100.

  The memory 106 is composed of a semiconductor device such as a DRAM (Dynamic Random Access Memory), and is an area for temporarily storing programs and data.

  The timer 107 is used to hold the current time by a crystal oscillation mechanism or the like and to measure the timing at which the wattmeter 101 performs measurement.

  The auxiliary storage interface 108 serves to connect the auxiliary storage device 109 to other parts.

  The auxiliary storage device 109 is a storage device such as a hard disk drive (HDD) or a solid state drive (SSD), and includes a control program 110, a waveform pattern list 116, a device / operation mode name list 117, and a measurement history 118. The usage time / use season name list 120 is stored.

  The control program 110 includes a UI control unit 111, a measurement control unit 112, a feature extraction unit 113, a pattern identification unit 114, and a data registration reference unit 115.

  The UI control unit 111 is a part that displays and switches the screen, and controls display on the display device 102.

  The measurement control unit 112 gives a measurement instruction to the wattmeter 101 via the measurement interface 119 and inputs a measurement result.

  The feature extraction unit 113 analyzes the measured current waveform and extracts a waveform pattern which is a feature component.

  The waveform pattern is a collection of numeric strings indicating the current waveform characteristic amounts in order to distinguish the measured current waveform, and is created based on the frequency analysis result of the current waveform. For frequency analysis, Fourier transform or the like is used. The calculated parameters may be reduced by principal component analysis or the like. If the feature amount can be expressed with a small number of parameters, the calculation amount of matching determination between patterns can be reduced, and the data amount of the pattern necessary for matching determination can be reduced. The method of calculating the frequency characteristics is not limited to this, but a method that represents the characteristics of the current waveform and can be identified.

  The pattern identification unit 114 determines whether the waveform pattern extracted by the feature extraction unit 113 matches the waveform pattern in the waveform pattern list 116 that has been measured and registered in advance. The coincidence determination of the waveform pattern is performed, for example, by calculating a square error of each numerical value constituting the waveform pattern and determining that the closest error is a match. However, if the closest waveform pattern is always determined to match, even if an unknown waveform pattern is detected, it will be determined as one of the registered waveform patterns. Keep it. Even if the closest waveform pattern is found, if there is a difference greater than or equal to this threshold value, it is not determined as a match. The waveform pattern matching determination method may be any method that can quantitatively calculate how close the waveform patterns to be compared are, and a method other than the square error may be used.

  The data registration reference unit 115 registers and refers to the waveform pattern list 116, the device / operation mode name list 117, the measurement history 118, and the use time / use season name list 120. In the registration of the waveform pattern, the pattern identification unit 114 determines whether the waveform pattern extracted by the feature extraction unit 113 matches the waveform pattern in the waveform pattern list 116 that has been measured and registered in advance. This is performed when the pattern list 116 is not found.

Further, after the operation of the device identification apparatus 100 is started, the waveform pattern identified by the pattern identification unit 114 is sequentially recorded in the measurement history 118 together with the time information and the power value. When there is an instruction to refer to the waveform pattern list 116, the device / operation mode name list 117, the measurement history 118, and the use time / use season name list 120, each is referred to.
<Installation of device identification device>
A method for installing the device identification apparatus 100 will be described with reference to FIG. As shown in FIG. 2, the device identification apparatus 100 installs a wattmeter 101 on a distribution board, and performs power measurement and operation mode estimation of an electrical device to which power is supplied from the installation location. It is assumed that the wattmeter 101 can be freely removed and can be installed at a specific branch in the distribution board as shown in FIG. 2B in addition to FIG. 1 to N of the electric devices in the figure indicate that a plurality of electric devices are connected.
<Estimation of operation mode of electrical equipment by current waveform measurement>
A method for device identification by current measurement and an estimation of an operation mode will be briefly described. Here, the operation mode represents an operation state of the device. For example, in the case of an air conditioner, there are operation modes such as heating, cooling, and air blowing. FIG. 9 shows a current waveform of an electrical device that operates on an alternating current, which is a measurement target. 901 and 903 have different current waveforms, which indicates that the current waveform has changed at the time of 902. In some cases, the current waveform of the electric device changes depending on the operation mode, and the device operating and the operation mode can be identified by detecting the difference in the current waveform.
<Registration of information on electrical equipment to be used>
First, the information on the electric device input by the instruction input unit 103 is registered in the device / operation mode name list. Registration of the information on the electrical device is a process necessary before operating the device identification apparatus 100. A method for registering device information in the device identification apparatus 100 will be described with reference to the flowchart shown in FIG. Registration of device information is performed when current measurement is performed by operating a device registered by the user. First, the current measurement result is registered, and the device input by the instruction input unit 103 and the name of the operation mode are registered for the registered measurement result. FIG. 10 shows a series of transitions of the operation screen displayed on the display device 102.

  When registering information on electrical equipment, it is necessary to measure the power of the equipment individually. Therefore, the system that feeds power to the equipment to be registered as shown in Fig. 2 (b) among the distribution systems of the distribution board Is connected to the wattmeter 101. This completes preparation for registration. Next, the device identification device 100 is set.

  First, information on the electrical equipment to be measured is registered (steps 301 to 303, FIGS. 10A to 10C). In the case of a device registered for the first time, the device name is registered (step 303, FIG. 10 (c)). In the case of a registered device, the device is selected from the device list (step 302, FIG. 10 (b)). When the selection of the device to be registered or the input of the device name is completed, the screen changes to the measurement start screen (FIG. 10 (d)).

  On the measurement start screen, a message to start the measurement by operating the device to be registered and a measurement start button are displayed (step 304, FIG. 10 (d)). After selecting the measurement start button, the user operates the electric device to be registered in an operation mode in which the user wants to register. For devices that do not have a specific operation mode, it is only necessary to turn on the power.

  A message indicating that measurement is in progress and a stop button are displayed on the measuring screen (FIG. 10E) displayed by selecting the start button (step 305, FIG. 10E). The user can select the stop button at any time to stop the measurement, but to prevent it from stopping when the measurement is insufficient, switch on the electrical equipment to be measured or change the operation mode. Until the changed current waveform reaches a steady state, a message to wait for the stop is displayed as shown in FIG. When the current waveform reaches a steady state, the message is switched to a stable message as shown in FIG. Whether or not the current waveform has reached a steady state is determined by whether or not a new current waveform is no longer measured.

  At this time, before the user operates the device, since it is not the operation mode that the user is trying to register, such as a standby state, the actual measurement is started from the time when the waveform greatly changes from that state. A detailed flow of measurement will be described with reference to FIG.

  After the measurement for a certain time, the user selects the stop button to stop the measurement. When the measurement is stopped, the measurement result screen is displayed (step 307, FIG. 10 (g)). When registering the measurement result (step 308: YES), the user inputs the measured operation mode name (step 309). A method for inputting the operation mode name will be described later.

  When the operation mode name has been entered, a message requesting the user to operate in the same operation mode is displayed in order to confirm whether the registered operation mode can be correctly identified (step 310, FIG. 10 (i)). After the user operates the device according to the request, it is confirmed on the screen as shown in FIG. 10 (k) whether or not the identification has been normally performed. If the identification is not successful (step 311: NO), registration is performed again (step 304).

  If it is found that the identification is not successful after the start of operation, it becomes necessary to check which mode registration has failed. Therefore, such a trouble is reduced by confirming the success or failure of the registration immediately after the registration.

If there is no problem in the identification (step 311: YES), it is confirmed whether or not the registration is completed (step 312, FIG. 10 (l)). When another operation mode is continuously registered (step 312: NO), the process returns to step 304. Even if the measurement result is not registered (step 308: NO), the measurement is ended (step 312: YES), or the process returns to step 304 to perform measurement again (step 312: NO).
<Current measurement and waveform pattern extraction>
With reference to the flowchart shown in FIG. 4, a series of operations for measuring a current and extracting a waveform pattern and creating a measurement history representing a temporal change in the amount of current will be described.

  First, current and voltage are measured by the wattmeter 101 (steps 401 and 402). The current is measured as a continuous value for at least one AC period (20 milliseconds when the power supply frequency is 50 Hz). The time length to be measured at a time may be one AC period or more, but is preferably an integral multiple of the AC period. This is because the frequency analysis cannot be performed correctly unless measurement is performed in an integral multiple of the period. In addition, since the frequency analysis result may be different, the registered waveform and the waveform to be measured and collated must always match.

  The current waveform, which is a continuous change in the amount of current measured in steps 401 and 402, is converted into a waveform pattern composed of a small number of features (sequence) by frequency analysis by the feature extraction unit 113 (step 403). The feature extraction method will be described on the assumption that a principal component analysis is performed on a power spectrum obtained by Fourier transform, and a feature amount is selected from the first principal component to the Nth principal component. N is a number of 2 or more. The value of N is not particularly defined, but there is no problem if the number is sufficiently smaller than the number of frequency components obtained by Fourier transform. The purpose of narrowing down the feature components to a small number of feature amounts is to reduce the amount of registration data and to reduce the amount of calculation when matching with registered patterns is performed. Therefore, other methods may be used as long as the same effect can be obtained.

  The current waveform converted into the waveform pattern is identified by the pattern identification unit 114 as to whether it is a pattern measured and registered so far or not (steps 404 and 405). The pattern identification unit 114 performs identification by comparing the waveform pattern list 116 and the waveform pattern extracted by the feature extraction unit 113. An example of the waveform pattern list 116 is shown in FIG. The waveform pattern list includes a pattern ID 1301 uniquely assigned to each pattern, an operation mode ID 1302 indicating which operation mode the waveform pattern is, and a numerical value sequence 1303 indicating the pattern.

  If the corresponding pattern exists in the waveform pattern list 116, that is, if it is a registered pattern, the current time, the pattern ID of the pattern, and the electric energy are recorded in the measurement history 118 (step 411). If there is no corresponding pattern, the waveform pattern measured this time is newly registered in the waveform pattern list 116, and a pattern ID is assigned (step 406). Further, the pattern ID is recorded in the measurement history 118 (step 407). An example of the measurement history 118 is shown in FIG. It consists of a measurement time 1304, power 1305, and pattern ID 1306.

  Steps 408 to 410 are processes for grouping the measured patterns according to the degree of similarity, and this corresponds to a case where the user tries to register a plurality of modes by one measurement.

  The method of registering the current waveform pattern of electrical equipment is basically characterized by registering one operation mode in one measurement, and registering it as the same operation mode even if multiple patterns are measured at one time. However, when a pattern with a significantly different pattern is measured, it is presented to the user and selected to be registered as one operation mode or a plurality of operation modes.

  In step 408, a square error with the pattern measured immediately before is calculated, and it is confirmed whether the value is equal to or less than a predetermined threshold value. If it is equal to or less than the threshold (step 408: YES), it is recognized as the same operation mode as the immediately preceding measurement pattern. If it is equal to or greater than the threshold value (step 408: NO), it is recognized as an operation mode different from the previous measurement pattern, and a new operation mode is defined. The pattern similarity determination method may be any method that can quantitatively calculate how close the patterns to be compared are, and a method other than the square error may be used.

FIG. 13C shows an example of a device / operation mode name list. The device ID 1307 is an ID uniquely assigned to the device. The device name 1308 is a name of a device registered by the user. The operation mode ID 1309 is the same as the operation mode ID 1302 in FIG. The operation mode name 1310 is the name of the operation mode registered by the user. The usage time name 1311 and the usage season name 1312 are the expected usage time and usage season of the device registered by the user's input, respectively. Here, “-” means that the use time and the use season are not specified. For example, the usage period is not specified for a refrigerator that is always energized and used.
<Enter operation mode name>
A method of inputting the operation mode name, usage time, and usage season after the measurement will be described with reference to the flowchart shown in FIG. 5 and the screen transition shown in FIG. This corresponds to step 309 in the flowchart of device information registration described in FIG.

  First, the process branches depending on whether or not the operation mode is already registered. When the operation mode has been registered (step 501: YES), a message to that effect is displayed and a display for selecting whether or not to register as another device is displayed (step 507, FIG. 10 (m)). When the user registers as another device for this operation mode (step 512: YES), the device name is selected in the device name setting (step 513, FIG. 10 (n)), and the usage time / use season is selected. Proceed to the setting process (step 514). On the other hand, if not registered as another device (step 512: NO), the process branches depending on whether the name is changed. When the name is set again (step 508: YES), the operation mode is selected (step 509). When the name is not changed (step 508: NO), the process proceeds to the setting of use time / use season (step 514).

  Here, the selection of the operation mode means that the user selects an operation mode for setting a name from one or more operation modes displayed on the screen. As described in the device information registration process, since the user may intentionally switch the operation mode of the device, multiple operation modes may be measured at one time. In this case, the user selects the operation mode from the measurement result screen. Select one by one and register the name of the operation mode. This is shown in FIGS. 10 (g) to 10 (h). For the operation mode with no name set, that is, the operation mode registered for the first time in the current measurement, temporary names such as “mode 1” and “mode 2” are displayed as shown in the figure. The user selects this one by one and registers the name.

  After changing the name of the selected operation mode (step 510), when changing the name of another operation mode (step 511: YES), the user is again made to select the mode (step 509). When the name of another operation mode is not changed (step 511: NO), the process proceeds to the process of setting the use time / use season (step 514).

  When the operation mode is unregistered or there are a plurality of operation modes, and at least one of the operation modes is unregistered (step 501: NO), the user is allowed to select an operation mode for setting a name (step 502). If an operation mode whose name has already been registered is included and the user selects this operation mode (step 503: YES), the name of the operation mode is changed (step 505). When an operation mode for which a name has not yet been set is selected (step 503: NO), the name of the operation mode is set (step 504). In addition, when there is an operation mode and name setting is performed (step 506: YES), the operation mode is selected again (step 502). If there is no other operation mode or no other operation mode is set (step 506: NO), the process proceeds to the setting of use time / use season (step 514).

  In the setting of the usage time / use season (step 514, FIG. 10 (o)), when setting the use time information corresponding to the selected operation mode (step 514: use time), the use season information is set. If it is set (step 514: use season), the process is branched depending on the current information (step 514: registration). When the usage time information is selected, the usage time is registered on the usage time information registration (step 515), and the usage time is selected on the screen of FIG. Similarly, when the information on the use season is selected, the use season is selected on the screen of FIG. 10 (q) in the registration of the use season information (step 516). If registration with the current information is selected, the process ends.

  As described with reference to FIGS. 3 to 5, in the present invention, a user starts operation and ends measurement by operating in a specific device and operation mode to be registered, and the measured current waveform is 1 or Register multiple operation modes.

  Therefore, the user can recognize and register the device and the operation mode during the measurement period.

  In addition, as described with reference to FIG. 4, even when a plurality of current waveforms are measured for one operation mode while the user is measuring current, the current waveforms in the same operation mode are properly determined. For identification, even when a plurality of current waveforms are measured, it can be registered as one operation mode.

Also, by setting the period during which the registered device and operation mode are used, if multiple similar types of devices are used, if different usage periods are set, the same type of current waveform is used for the same type of device. Even if is measured, the device can be identified by the period of use. <Start of operation of device identification device>
Up to now, the device information registration process required in advance by the device identification apparatus has been described. Now, the operation when the operation is actually started will be described. When registering information on electrical equipment, the wattmeter 101 was switched for each system to which the electrical equipment to be registered was connected as shown in FIG. 2 (b). Thus, the power meter 101 is connected to the main trunk side.

  Although it is not possible to measure individual currents when measuring on the trunk side, the current amount when multiple electrical devices are operated simultaneously is equal to the sum of the current amounts when each device is operated separately according to Kirchhoff's law. Therefore, the waveform pattern match determination is performed using this property. FIG. 12 shows a state where two current waveforms are superimposed. 2 (a) and 2 (b) are current waveforms of different devices, and FIG. 12 (c) is a current waveform when the devices of FIGS. 12 (a) and 12 (b) are operated simultaneously. It is. It can be seen that FIG. 12 (c) is the sum of FIG. 12 (a) and FIG. 12 (b).

  The waveform pattern, which is the feature value extracted from the current waveform, is used to determine whether the current waveform matches. However, if the current waveform and the waveform pattern extracted from it have a linear relationship, Kirchhoff's law is established for the waveform pattern as well. To do. Therefore, by creating a combination of registered waveform patterns for the waveform pattern extracted from the current waveform measured on the trunk side and performing a match determination, it is possible to determine which device is operating in which operation mode combination. presume.

  In addition, when it is determined that there are two or more corresponding devices with the same device and operation mode as a result of the matching determination based on the waveform pattern, the determination is made based on the usage time / use season information. Estimate one device from other devices. For example, if the same waveform pattern is obtained under the conditions of winter Saturdays and Sundays (FIG. 17 (a)), the air conditioner 1 and the air conditioner 2 are of the same type, but the usage time conditions are different. (FIG. 17B). Here, the median of the waveform pattern (PC1, PC2 in FIG. 17 (c)), the median usage time of the air conditioner 1 (A1C in FIG. 17 (c)), and the median usage time of the air conditioner 2 (Fig. 17 (c) A2C) is detected, time distances (Δt1, Δt2, Δt3, Δt4) are calculated, and the waveform of PC1 is estimated to be air conditioner 2 where Δt1 <Δt2, and PC2 The waveform is assumed to be the air conditioner 1 where Δt3> Δt4. This result is output as shown in FIG. 17 (d). FIG. 6 is a flowchart for displaying the operation status of each device at the request of the user after the start of operation. After the operation is started, measurement is always performed until the user stops, and the measurement history is accumulated. The user can check the operation status of each device at an arbitrary timing. FIG. 11A shows a display screen of the operation status of each device during operation. The display screen includes a power amount 1101, a device list 1102, an operation status 1103 of each device, a time 1104, and a scroll bar 1105. The display is constantly updated, and the past situation can also be confirmed by moving the scroll bar 1105. The names of the devices in the device list 1102 and the operation mode names of the operation status 1103 are input by the user. The display on the screen in FIG. 11A corresponds to steps 610 to 611 in the flowchart shown in FIG.

  If a time zone in which the operation mode could not be recognized is found (step 612: YES), a message for confirming the situation is displayed to the user (step 613, FIG. 11 (b)). This asks whether the user has used an unregistered device. If an unregistered device is used (step 614: YES), a message requesting registration of device information is displayed (step 615). If the user does not use an unregistered device, the registered device has not been recognized successfully, and a message requesting re-registration of registered device information is displayed (step 616). Since the time zone that could not be recognized can be confirmed on the screen, it is possible to infer which device has failed to recognize which operation mode by looking at the time zone and the operation status of other devices. Next, a time zone suitable for registration is obtained from the measurement history, and guidance by message display is performed (step 617). The time zone suitable for registration is a time zone in which the operation mode of other operating devices does not change and the current waveform is constant. By performing registration under such circumstances, the operation of other devices is prevented from affecting the registration. The processing for obtaining this time zone will be described later using the flowchart shown in FIG.

  After guidance of a time zone suitable for registration, or if there is no unregistered operation mode in step 612, it is next checked whether there is any device that has not been detected for a certain period of time (step 618). If there is such a device (step 618: YES), a message to that effect is displayed (step 619), and it is confirmed whether the device is not currently used (step 620).

  When the user has not used the device or the frequency of use is low (step 620: YES), it is confirmed whether or not the information on the device is to be deleted, and the user has instructed the deletion (step 621: YES) ), The information (information of the device in the device / operation mode name list and the pattern of the related waveform pattern list) is deleted, and the process ends (step 622). The more device information that is registered, the greater the number of times that matching is determined during pattern identification, leading to an increase in processing time. Therefore, the processing time is shortened by deleting unnecessary information.

  As described above, every time the user displays the operation status, the user can refer to the measurement history, and inquire the user about the presence of an unregistered device and the device that is not already in use. Device information will be updated according to the actual usage of the device.

Further, even if the air conditioner 1 and the air conditioner 2 are the same type of equipment in step 611 in FIG. 6, if the usage time is set as air conditioner 1: daytime and air conditioner 2: nighttime, as shown in FIG. The determination display can be performed, and the identification accuracy of each device can be improved. <Device information registration after operation start>
When registering the device information after the operation is started, the device identification device 100 is temporarily stopped, and the power meter 101 is connected to the system connected to the device to be registered at the branch in the distribution board as shown in FIG. Connect and measure. At this time, when another device is connected to the same system, the device is not operated only during measurement. However, there are cases where devices that always need to be energized, such as refrigerators, are connected and difficult to stop, and it is not preferable to stop the device identification device 100 itself due to the nature of the devices that are always operating.

  Therefore, the current waveform is measured before operating the device to be registered and measuring the current waveform, that is, without operating the device to be registered. The current waveform measured at this time is the waveform of the device operating at that time. After starting the operation of the device to be registered, the current waveform that is the sum of this current waveform and the current waveform of the device to be registered should be measured, so subtract the previously measured current waveform from the current waveform. Thus, the current waveform of the device to be registered can be obtained.

  However, if the operation mode of other devices changes and the current waveform changes during measurement of the current waveform of the device to be registered, the waveform of the device to be registered cannot be obtained correctly. That is, in order to obtain the current waveform of a device to be registered in a situation where other devices are operating simultaneously, it is necessary that the other devices continue to operate in the same operation mode.

  Therefore, a part where the same device is operating in the same operation mode for a certain time or more is searched from the measurement history. Specifically, the operation mode of each device, that is, a time zone in which the current waveform does not change and the power consumption does not change is searched for for a predetermined time or longer. Looking at the transition of the operation of the device shown in FIG. 11 (a), for example, it can be seen that the air conditioner 1 is “heating: weak” and operates at a constant power before and after 17:00. In such a place, it can be said that the current waveform of the device to be registered can be measured by the method described above.

  The operation when the above unregistered device is found will be described using the flowchart shown in FIG. When an unregistered device is found, in order to search for a time zone in which the current of the device can be measured, first, the operation status of each device is examined with reference to the past measurement history (step 701).

  Here, a search is performed from the measurement history to determine whether there is a device that has been operating for a certain time or more and the operation mode is the same and the power consumption is constant (step 702). Since the purpose of referring to the history at this time is to search for a time zone in which the device is expected to operate in the same way in the future, the search range is not limited to one day, but refers to the measurement history of the past one week or so. , Take an average. If there is a corresponding time zone, a message for guiding the time zone as a time zone suitable for registration is displayed (step 709).

  If the corresponding time zone is not found, the user is confirmed whether there is no device that can be stopped for a certain period of time. An environment suitable for registration is created by having the user stop one or more devices. For example, the device list is presented to the user and an arbitrary device is designated (step 704). When an arbitrary device is specified, the information of the specified device is removed from the measurement history, and the device that has been operating for a certain period of time and the operation mode are the same and the power consumption is constant. It is searched whether there is any (step 705).

  If there is a corresponding time zone, a message for guiding the time zone as a time zone suitable for registration is displayed (step 706: YES). If the corresponding time zone is not found (step 706: NO), the user is confirmed whether there is any other device that can be stopped without any problem (step 707). If there is a device that can be stopped, the process returns to step 705 to designate the device.

  If there is no device that can be stopped (steps 704 and 707: NO), the device identification device 100 is temporarily stopped, and the power meter 101 is connected to the branch of the distribution board to which the electric device to be registered is connected to perform measurement. A message to guide you is displayed.

  FIG. 8 shows a flowchart of processing for newly registering in a state where other devices are actually operating. The difference from the pre-operation registration process described in FIG. 3 is that the current waveform is measured at that time before measurement of the registered device (step 804) and the current measured in advance from the measurement result of the registered device. A feature extraction is performed by subtracting the waveform (step 806). The current waveform of the device to be registered is obtained by subtracting the current waveform portion measured in advance from the current waveform measured in step 806, and feature extraction (calculation of waveform pattern) and registration are performed from this current waveform.

  According to the first embodiment described above, when the waveform pattern for each operation mode of the electric device 002 is registered in the device identification apparatus 100, the operation mode of the electric device 002 is registered one by one. By displaying a message instructing the start and end timing of the accompanying current waveform measurement process, it is possible to execute the registration operation of the electric device in a manner that is easy for the user to understand. Further, it is possible to register information on a new electric device in the device identification device without stopping the device identification device and the electric device registered in the device identification device as much as possible, and provide a user-friendly device.

  Furthermore, when registering a waveform pattern for each operation mode of an electrical device in the device identification apparatus 100, by registering information on usage time / use season, devices having the same waveform pattern or waveforms that are very similar to each other are registered. Even when devices having patterns have different usage time trends, individual devices can be identified, and the accuracy of device determination can be improved.

  In the present embodiment, an example of a device identification device that stores a pattern and a measurement history on a data server connected via a network will be described.

  FIG. 14 shows a connection diagram of the device identification apparatus according to the second embodiment of the present invention. In the second embodiment, the device identification apparatus 1400 is connected to the data server 1410 via the network 1450. The network 1450 is a public network such as the Internet. However, a private network such as a LAN connecting the data server 1400 and the user device identification apparatus 100 may be used.

  The data server 1410 has a form in which a CPU 1411, a memory 1412, an auxiliary storage interface 1413, and a network interface 1414 are coupled by a bus. The auxiliary storage interface 1413 serves to connect the auxiliary storage device 1418 and other parts. The auxiliary storage device 1418 holds a waveform pattern list 1415, a device / operation mode name list 1416, a measurement history 1417, and a usage time / use season name list 1419.

  The device identification device 1400 of the second embodiment is an auxiliary storage device that includes a network interface 1404 coupled to a bus, a waveform pattern list, a device / operation mode name list, a measurement history, and a use time / use season name list. The configuration is the same as that of the device identification apparatus 100 according to the first embodiment except that it is not included in 109. Other configurations have the same functions as the configurations denoted by the same reference numerals shown in FIG. 1 and have not been described.

  The network interface 104 connects to the data server 1410 via the network 1450, and registers the waveform pattern list 1415, device / operation mode name list 1416, measurement history 1417, and usage time / use season name list 1419 with the data server 1410.・ Delete and update.

  In the second embodiment, the waveform pattern list 1415, the device / operation mode name list 1416, the measurement history 1417, and the usage time / use season name list 1419 are stored on the data server 1410, thereby auxiliary storage of the device identification apparatus 1400. There is an advantage that the capacity of the device 109 can be reduced. Further, since it is not necessary to rewrite the auxiliary storage device 109, the auxiliary storage device 109 can be made into an inexpensive ROM (Read Only Memory), and the device can be produced at low cost. Further, since a larger data storage area can be secured on the data server 1410 than the auxiliary storage device 109 of the device identification device 1400, a longer-term measurement history can be stored.

  Data that is frequently accessed in consideration of the time taken to store and read the waveform pattern list 1415, the device / operation mode name list 1416, the measurement history 1417, and the usage time / use season name list 1419 to the data server 1410. May be stored in the device identification apparatus 1400.

  According to the second embodiment described above, the auxiliary storage device 109 of the device identification device 1400 can be realized at a low cost, and a longer-term measurement history can be stored. Cost can be reduced while making it good.

  In the present embodiment, an example of a device identification apparatus that performs operation / display using an operation / display terminal connected via a network will be described.

  FIG. 15 shows a connection diagram of the device identification apparatus according to the third embodiment of the present invention. In the third embodiment, the device identification apparatus 1500 is connected to the operation / display terminal 1510 via the network 1450. The network 1450 is a private network such as a LAN connecting the operation / display terminal 1510 and the user device identification apparatus 1500. However, it may be a public network such as the Internet.

  The operation / display terminal 1510 has a form in which a CPU 1511, a memory 1512, a display device 1513, an instruction input unit 1514, an I / O interface 1515, and a network interface 1516 are coupled by a bus.

  The difference from the first embodiment is that the operation and display are performed by the operation / display terminal 1510 connected via the network 1450 without the display device and the instruction input unit. Other configurations have the same functions as the configurations denoted by the same reference numerals shown in FIG. 1 and have not been described.

  The operation / display terminal 1510 only needs to have the above-described configuration, and may not be a dedicated terminal, but may be a personal computer, a smartphone, or a television having a network function. In the figure, only one operation / display terminal 1510 is written, but there may be a plurality of terminals.

  By separating the operation / display part from the device identification device 1500, as long as the operation / display terminal 1510 can communicate with the device identification device 1500 via the network 1450, the operation status of the electric device is no matter where the user is. The convenience can be improved.

  Further, since the display device 102, the instruction input unit 103, and the I / O interface 104 are not required for the device identification device 1500, the device identification device 1500 can be configured at low cost.

  According to the third embodiment described above, when the user operates the device identification device 1500 or confirms the measured operation status of the electrical device 002, it is not necessary to move to the place where the device identification device 1500 is installed. Since the operation of the device identification device 1500 and the measurement result can be referred from anywhere as long as there is a display terminal, a user-friendly device can be provided.

The present embodiment is a combination of the second embodiment and the third embodiment. FIG. 16 shows a connection diagram of the device identification apparatus according to the fourth embodiment of the present invention. In the fourth embodiment, the device identification apparatus 1500 is connected to the operation / display terminal 1510 and the data server 1410 via the network 1450. The details of the constituent elements have the same functions as the configurations denoted by the same reference numerals shown in FIGS. 1, 14, and 15 and have not been described.

  The device identification device 1500, the operation / display terminal 1510, and the data server 1410 are connected to the same network 1450. However, the operation / display terminal 1510 and the data server 1410 do not need to be connected to the same network. What is necessary is just to be able to connect with the apparatus identification device 1500.

  The advantages of both the second embodiment and the third embodiment are provided, the auxiliary storage device 109 can be an inexpensive ROM (Read Only Memory), the display device 102, the instruction input unit 103, the I / O The device identification apparatus 1500 can be configured at a low cost in that the O interface 104 is unnecessary. In addition, as long as the operation / display terminal 1510 can communicate with the device identification apparatus 1500 via the network 1450, the user can check the operation status of the electric device from anywhere and the convenience is improved.

  Data that is frequently accessed in consideration of the time taken to store and read the waveform pattern list 1415, the device / operation mode name list 1416, the measurement history 1417, and the usage time / use season name list 1419 to the data server 1410. May be stored in the device identification apparatus 1500.

  According to the fourth embodiment described above, the device identification device 1500 can be realized at low cost, and it is not necessary to move to the place where the device identification device 1500 is installed. If there is an operation / display terminal, the device identification device 1500 can be operated from anywhere. Since operations and measurement results can be referred to, a user-friendly device can be provided.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

  Each of the above-described configurations, functions, processing units, processing steps, and the like may be realized by hardware by designing a part or all of them with, for example, an integrated circuit.

  Further, the control lines and information lines indicate what is considered necessary for the explanation, and not all the control lines and information lines on the product are necessarily shown. Actually, it may be considered that almost all the components are connected to each other.

001 AC power source 002 Electric device 100 Device identification device 101 Wattmeter 102 Display device 103 Instruction input unit 104 I / O interface 105 CPU
106 Memory 107 Timer 108 Auxiliary Storage Interface 109 Auxiliary Storage Device 110 Control Program 111 UI Control Unit 112 Measurement Control Unit 113 Feature Extraction Unit 114 Pattern Identification Unit 115 Data Registration Reference Unit 116 Waveform Pattern List 117 Device / Operation Mode Name List 118 Measurement History 119 Measurement interface 120 Usage time / use season name list 1410 Data server 1411 CPU
1412 Memory 1413 Auxiliary storage interface 1414 Network interface 1415 Waveform pattern list 1416 Device / operation mode name list 1417 Measurement history 1418 Auxiliary storage device 1419 Usage time / use season name list 1500 Operation / display terminal 1511 CPU
1512 Memory 1513 Display device 1514 Instruction input unit 1515 I / O interface 1516 Network interface

Claims (6)

A device identification device that is connected to a power meter that measures the current waveforms of two power consuming devices and identifies the operation mode of each power consuming device from the current waveform,
A registration unit for registering a current waveform pattern in association with an operation mode and a use period of the two power consuming devices;
For the two power consuming devices, a measurement unit that measures a current waveform for a measurement period;
When the current waveform pattern measured by the measuring unit is the same pattern for two power consuming devices, one power consuming device in which the period during which the current waveform is measured corresponds to the usage period registered by the registration unit A control unit for specifying an operation mode with respect to
A device identification apparatus comprising: A display unit;
2. The control unit causes the display unit to display a screen instructing to input a usage period for a specific operation mode of a specific power consuming device to be registered by the registration unit. The device identification device described. A display unit;
2. The device identification device according to claim 1, wherein the control unit causes the display unit to display the specified power consuming device and the operation mode together with a usage time. Device identification comprising two power consuming devices, a wattmeter that measures the current waveform of each power consuming device, and a device identification device that is connected to the wattmeter and identifies the operation mode of each power consuming device from the current waveform A system,
The device identification device is
A registration unit for registering a current waveform pattern in association with an operation mode and a use period of the two power consuming devices;
For the two power consuming devices, a measurement unit that measures a current waveform for a measurement period;
When the current waveform pattern measured by the measuring unit is the same pattern for two power consuming devices, one power consuming device in which the period during which the current waveform is measured corresponds to the usage period registered by the registration unit A control unit for specifying an operation mode with respect to
A device identification system comprising: The device identification device further includes a display unit,
The said control part displays the screen which instruct | indicates to input the utilization period about the specific operation mode of the specific power consumption apparatus which should be registered in the said registration part on a display part, The display part characterized by the above-mentioned. The device identification system described. The device identification device further includes a display unit,
The device identification system according to claim 4, wherein the control unit causes the display unit to display the specified power consuming device and the operation mode together with the usage time.

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