JP6041784B2 - Power measuring apparatus, power measuring method, and program - Google Patents

Description

  The present invention relates to a power measurement device, a power measurement method, and a program.

  Conventionally, a power measuring device that can attach and detach current sensors with different rated currents and detects a current supplied to an electrical device (hereinafter referred to as a load) installed in a general home by a current sensor suitable for the load current used. There is.

  For example, Patent Document 1 discloses a power measurement device that receives conversion information unique to a current sensor representing a conversion ratio, a ratio error, a phase angle, and the like of the current sensor from a current sensor connected to the apparatus main body. According to this power measuring device, it is not necessary to store the conversion information of the current sensor in the power measuring device for each current sensor having a different rated current, so that the user's setting work can be reduced.

JP 2007-298414 A

  However, an operator who installs the current sensor may mistakenly connect a current sensor that is not suitable for the load current to the power measuring device. In general, the smaller the current compared to the rated current, the larger the error in the current detected by the current sensor. Therefore, for example, when the load current used is 30 amps and the current sensor rated 100 amps is used, the load current used may not be accurately detected.

  As described above, when a current sensor that should not be connected originally is connected to the power measuring apparatus, there is a problem that the current supplied to the load cannot be accurately detected. Further, there is a problem that it is difficult to notice that an incorrect current sensor is connected after the installation work of the current sensor.

  The present invention is for solving such a problem, and prevents a current sensor that should not be originally connected from being connected, and can accurately detect a current supplied to a load, An object is to provide a power measurement method and program.

The power measuring device according to the present invention is
A connection means to which a current sensor is connected;
Identification means for identifying the type of current sensor connected to the connection means;
Acquisition means for acquiring type information representing the type of current sensor to be connected to the connection means;
Notification control means for performing control to notify the outside whether or not the type of the current sensor identified by the identification means matches the type of the current sensor represented by the type information acquired by the acquisition means And comprising
The identification means acquires an electrical signal obtained by dividing a predetermined voltage by the resistance of the current sensor connected to the connection means and the resistance inside the power measuring device, and is stored in advance. In addition, a current sensor corresponding to an electrical signal having the same magnitude as the obtained electrical signal from data in which the type of the current sensor and the electrical signal obtained when the current sensor is connected to the connection means are associated with each other. Identifying the type of current sensor connected to the connection means by selecting the type of
It is characterized by that.

  ADVANTAGE OF THE INVENTION According to this invention, it can prevent connecting the current sensor which should not be connected originally, and can detect the electric current supplied to load correctly.

It is a figure which shows the structure of the electric power measuring apparatus which concerns on embodiment of this invention. It is a figure which shows the structure of the connection sensor identification data memorize | stored in the memory | storage part shown in FIG. It is a figure which shows the structure of the installation data memorize | stored in the memory | storage part shown in FIG. It is a figure which shows the structure of the current sensor and electrical signal acquisition part which were shown in FIG. It is a flowchart which shows the process which the electric power measurement apparatus which concerns on embodiment of this invention performs. It is a figure which shows the structure of the electric power measuring apparatus which concerns on the modification of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  First, with reference to FIG. 1, the structure of the electric power measurement apparatus 10 which concerns on embodiment of this invention is demonstrated. The power measuring device 10 determines whether or not the current sensors 30a to 30c connected to the connectors 13a to 13c should be originally connected, and notifies the user of the determination result. When the current sensors 30a to 30c that should be connected are connected, the power measuring apparatus 10 performs a predetermined calculation related to the power of the system under measurement based on the electrical signals received from the current sensors 30a to 30c and the like. . The loads 40a to 40c are electric devices installed in a general household such as a refrigerator, a microwave oven, and a washing machine, for example. In the following description, the current sensors 30a to 30c and the loads 40a to 40c are referred to as the current sensor 30 and the load 40, respectively, unless they are distinguished from each other.

  The power measuring apparatus 10 includes a control unit 11, a storage unit 12, connectors 13a to 13c, A / D converters 14a to 14d, an electric signal acquisition unit 15, an input unit 16, a display unit 17, a notification unit 18, and a resistance voltage dividing circuit. 19 and a frequency information acquisition unit 20. In the following description, the connectors 13a to 13c and the A / D converters 14a to 14d are respectively referred to as the connector 13 and the A / D converter 14 unless they are distinguished from each other.

  The control unit 11 includes, for example, a CPU (Central Processing Unit), a RAM (Random Access Memory) functioning as a main memory of the CPU, a timer, and the like. The control unit 11 is connected to each unit of the power measurement device 10 via a system bus that is a transmission path for transferring commands and data, and controls the power measurement device 10 as a whole. Note that the control unit 11 may partially include a dedicated circuit such as an ASIC (Application Specific Integrated Circuit).

  The control unit 11 reads and executes the control program stored in the storage unit 12 when power is supplied to the power measurement device 10. Thereby, the control part 11 functions as the identification part 11a, the acquisition part 11b, the notification control part 11c, and the electric power calculating part 11d.

  The identification unit 11 a identifies the type of the current sensor 30 connected to the connector 13 based on the magnitude of the electrical signal received from the electrical signal acquisition unit 15.

  The acquisition unit 11 b acquires information (hereinafter referred to as type information) indicating the type of the current sensor 30 to be connected to the connector 13 from the input unit 16. The type information is, for example, the rated current of the current sensor 30.

  The notification control unit 11c determines whether or not the type of the current sensor 30 identified by the identification unit 11a matches the type of the current sensor 30 represented by the type information acquired by the acquisition unit 11b. Based on the determination result, the notification control unit 11 c performs control for notifying the outside of the current sensor 30 connected to the connector 13 via the notification unit 18.

  When the notification control unit 11c determines that the current sensor 30 to be connected is connected, the power calculation unit 11d performs a predetermined calculation related to the power of the system under measurement. Specifically, the power calculation unit 11d obtains the power used, the amount of power used, and the like of each of the loads 40a to 40c to be measured.

  The storage unit 12 includes a storage device such as a ROM (Read Only Memory) and a flash memory. The storage unit 12 stores various programs and data used for the control unit 11 to perform various processes, such as an OS (Operating System) and various application programs, and various data generated or acquired by the control unit 11 performing various processes. Remember.

  The storage unit 12 stores conversion information unique to the current sensor 30 representing a conversion ratio, a ratio error, a phase angle, and the like for each rated current and power supply frequency.

  The storage unit 12 stores a control program, connection sensor identification data, and installation data.

  The connection sensor identification data is data indicating the relationship between the type of the current sensor 30 and the magnitude of the electrical signal. The type of the current sensor 30 connected to the connector 13 is uniquely identified by the connection sensor identification data. The connection sensor identification data includes type information and electrical signal information. The type information is information for identifying the type of the current sensor 30, and corresponds to the rated current of the current sensor 30, for example. In the connection sensor identification data (see FIG. 2) of the present embodiment, since the product name, product number, etc. of the current sensor 30 are associated with the rated current, the product name, product number, etc. are handled as type information. It is possible. The electrical signal information represents the magnitude of the electrical signal obtained by the electrical signal acquisition unit 15 when the current sensor 30 is connected to the connector 13. The identification unit 11 a identifies the type of the current sensor 30 based on the magnitude of the electrical signal received from the electrical signal acquisition unit 15.

  The installation data is data indicating the current sensor 30 to be connected to the connector 13 and the load 40 to which the current detected by the current sensor 30 is supplied. As shown in FIG. 3, the installation data includes connector identification information, type information, and load identification information. The connector identification information is information for uniquely identifying the connector 13 and has, for example, a product number of the connector 13. The type information includes the rated current, the product name, the product number, and the like of the current sensor 30 as in the type information included in the connection sensor identification data. The load identification information is information for uniquely identifying the load 40, and includes, for example, at least one of the product name, product number, and type (main trunk, branch, etc.) of the load 40. The installation data is displayed on the screen of the display unit 17 together with request data for requesting input of the current sensor 30 to be originally connected to the connector 13. The installation data is used by an operator when installing the current sensor 30. The worker refers to the installation data, connects a predetermined current sensor 30 to each connector 13, and connects the current sensor 30 to a power supply line PW connected to a predetermined load 40.

  The connector 13 allows different types of current sensors 30 to be attached and detached. The connector 13 supplies a signal (electric signal) representing the current detected by the current sensor 30 to the A / D converter 14.

  Under the control of the control unit 11, the A / D converter 14 digitally converts the input analog electric signal and supplies the digital signal after the digital conversion to the control unit 11. The A / D converters 14a to 14c digitally convert the electrical signals supplied via the connectors 13a to 13c, and supply the digital signals after the digital conversion to the control unit 11. On the other hand, the A / D converter 14 d digitally converts the electrical signal supplied via the resistance voltage dividing circuit 19 and supplies the digital signal after the digital conversion to the control unit 11 and the frequency information acquisition unit 20.

  The electrical signal acquisition unit 15 is connected to the connector 13. The electric signal acquisition unit 15 divides a constant voltage (power supply voltage) given from the system under measurement at a ratio determined between the electric current acquisition unit 15 and the connected current sensor 30, and the divided electric signal is controlled by the control unit 11. To supply.

  The input unit 16 includes, for example, an input interface device that accepts various operations from the user. The input unit 16 supplies operation signals corresponding to various operations received from the user to the control unit 11. For example, the user confirms the installation data and the request data displayed on the display unit 17, and performs an operation of inputting the type of the current sensor 30 to be originally connected to each connector 13 using the input unit 16. The input unit 16 supplies the control unit 11 with information (hereinafter referred to as type information) indicating the type of the current sensor 30 input in accordance with a user operation.

  The display unit 17 includes a display interface device such as an LCD (Liquid Crystal Display) or an organic EL (Electro-Luminescence). The display unit 17 displays, for example, images corresponding to various image data supplied from the control unit 11 such as the above-described installation data and request data on the screen.

  The notification unit 18 includes, for example, a light emitting device including a light emitting unit such as an LED (Light Emitting Diode), a speaker, and the like. The notification unit 18 notifies whether the current sensor 30 connected to the connector 13 is used correctly or not under the control of the notification control unit 11c.

  The resistance voltage dividing circuit 19 divides a constant voltage (power supply voltage) given from the system to be measured. The resistance voltage dividing circuit 19 supplies the divided electric signal to the A / D converter 14d.

  The frequency information acquisition unit 20 receives the electrical signal supplied from the A / D converter 14d, and calculates the frequency (power supply frequency) of the received electrical signal. The frequency information acquisition unit 20 supplies information indicating the calculated frequency (hereinafter referred to as frequency information) to the control unit 11.

  Next, the configuration of the current sensor 30a and the electrical signal acquisition unit 15 illustrated in FIG. 1 will be described with reference to FIG. The current sensors 30b and 30c also have the same configuration as the current sensor 30a.

  The current sensor 30a includes a current transformer 31a, a resistor 32a, and a connector 33a.

  The current transformer 31a is connected to the power supply line PW connected to the load 40a to be measured by the operator. The current transformer 31a detects a current flowing through the power supply line PW and supplies an electrical signal corresponding to the detected current magnitude to the connector 33a.

  The resistance 32a has a different value for each type of the current sensor 30a, for example, 1 kΩ when the current sensor 30a is the product A and 3 kΩ when the current sensor 30a is the product B.

  The connector 33a is connected to the connector 13 (here, the connector 13a) of the power measuring apparatus 10.

  On the other hand, the electrical signal acquisition unit 15 includes resistors 151a to 151c, a multiplexer 152, and an A / D converter 153. In the following description, the resistors 151a to 151c are referred to as resistors 151 unless they are distinguished from each other.

  The resistor 151a is provided between the connector 13a and the multiplexer 152. A constant voltage (power supply voltage) is applied to the resistor 151a from the system to be measured, and the voltage is divided by the resistor 151a and the resistor 32a of the current sensor 30a connected via the connector 13a. The degree of partial pressure is proportional to the values of the resistor 151a and the resistor 32a, and changes according to the type (rated current) of the current sensor 30a connected to the connector 13a.

  For example, when the product A and the product B having different resistance values are connected, the magnitude of the electric signal after the voltage division is different. Specifically, when a voltage of V (volt) is applied from the system to be measured and the resistance 151a is 9 kΩ, when the current sensor 30a of the product A having a resistance of 1 kΩ is connected, the electric current of V / 10 A signal is obtained. On the other hand, when the current sensor 30a of the product B having a resistance of 3 kΩ is connected, an electric signal of V / 4 is obtained. The resistors 151b and 151c are the same as the resistor 151a, and the divided electric signals are all supplied to the multiplexer 152. Further, the values of the resistors 151 may all be the same or different. However, when using resistors 151 having different values, the storage unit 12 needs to store connection sensor identification data for each resistor 151 having different values.

  The multiplexer 152 is divided by the resistors 151 and the resistors of the connected current sensors 30 (in the case of the current sensor 30a shown in FIG. 4, the resistors 151a and 32a) under the control of the control unit 11. The electrical signal is selectively supplied to the A / D converter 153.

  The A / D converter 153 digitally converts the analog electrical signal received from the multiplexer 152 and supplies the electrical signal after the digital conversion to the control unit 11.

  Next, with reference to FIG. 5, operation | movement of the electric power measuring apparatus 10 comprised as mentioned above is demonstrated.

  When power is supplied to the power measuring device 10, the control unit 11 reads and executes the control program stored in the storage unit 12. Thereby, the control part 11 functions as the identification part 11a, the acquisition part 11b, the notification control part 11c, and the electric power calculation part 11d, and each part 11a-11d performs the following various processes.

  The identification unit 11 a controls the multiplexer 152 and the A / D converter 153 of the electrical signal acquisition unit 15 and selectively receives electrical signals corresponding to the connectors 13. When receiving the electrical signal corresponding to the selected connector 13, the identification unit 11a identifies the type of the current sensor 30 connected to the selected connector 13 (step S11). Specifically, when receiving the electrical signal corresponding to the selected connector 13, the identification unit 11 a obtains type information corresponding to the magnitude of the electrical signal from the connection sensor identification data stored in the storage unit 12. The type of the current sensor 30 connected to the selected connector 13 is identified by the acquired type information. For example, when the magnitude of the electrical signal corresponding to the selected connector 13a is V / 10, the identification unit 11a corresponds to the magnitude of the electrical signal from the connection sensor identification data illustrated in FIG. Acquire at least one type information of rated current, product name, and product number. Here, the identification unit 11a acquires the product name as type information. Thereby, the identification unit 11a identifies that the current sensor 30a connected to the selected connector 13a is the product A based on the type information.

  Next, the acquisition unit 11b acquires the type information of the current sensor 30 to be connected to the selected connector 13 from the input unit 16 (step S12). Specifically, first, the acquisition unit 11b displays the installation data stored in the storage unit 12 and request data for requesting input of the type information of the current sensor 30 to be originally connected to the connector 13 on the screen of the display unit 17. To display. The user confirms this screen, and uses the input unit 16 to input the type information of at least one of the rated current, the product name, and the product number of the current sensor 30 corresponding to the selected connector 13. Here, the acquisition unit 11b displays a screen requesting input of a product name on the display unit 17, and the user inputs “product A (product name)” via the input unit 16 according to this screen. Perform the operation.

  The notification control unit 11c determines whether or not the type of the current sensor 30 identified by the identification unit 11a matches the type of the current sensor 30 represented by the type information acquired by the acquisition unit 11b (step). S13). In the example described above, the notification control unit 11c determines that the types of the current sensors 30 connected to the selected connector 13 match because the product names of the current sensors 30 all match the product A.

  When the notification control unit 11c determines that the types of the current sensors 30 match (step S13; YES), the notification control unit 11c indicates that the current sensor 30 connected to the connector 13 selected in step S11 is correctly connected. The user is notified via 18 (step S14). Specifically, in the above-described example, for example, a message “current sensor 30a connected to connector 13a is connected OK” is output from notification unit 18 by an image or sound.

  On the other hand, when the notification control unit 11c determines that the types of the current sensors 30 do not match (step S13; NO), the notification control unit 11c indicates that the current sensor 30 connected to the connector 13 selected in step S11 is erroneously connected. Is notified to the user via the notification unit 18 (step S16). Specifically, for example, the message “current sensor 30a connected to connector 13a is connected NG” is output from the notification unit 18 by an image or sound. Thereafter, the notification control unit 11c returns to step S11, and the identification unit 11a performs the same processing as described above.

  Moreover, the notification control part 11c discriminate | determines whether all the current sensors 30 which should be connected are connected by whether the process of step S14 was performed about all the connectors 13 after the process of step S14 ( Step S16). If the notification control unit 11c determines that the processing of step S14 has not been performed for all the connectors 13 (step S16; NO), the notification control unit 11c returns to step S11, and the identification unit 11a performs the same processing as described above. Do.

  When the notification control unit 11c determines that all the current sensors 30 to be connected are correctly connected (step S16; YES), the power calculation unit 11d obtains various information (current, voltage) acquired from the system under measurement. , And the power supply frequency, etc.) and the conversion information unique to the current sensor 30 representing the conversion ratio, ratio error, phase angle, etc. stored for each type and power supply frequency of the current sensor 30 in the storage unit 12. A predetermined calculation relating to power is performed (step S17). For example, the power calculation unit 11d obtains power usage, power consumption, and the like for each system under measurement based on preset calculation contents. Thereafter, the power calculation unit 11d returns to step S11, and the identification unit 11a performs the same processing as described above.

  And the process of step S11-S17 is performed until the power supply to the electric power measurement apparatus 10 is no longer supplied, or until it interrupts according to a user's operation.

  As described above, according to the power measuring apparatus 10 according to the present embodiment, it is determined whether or not the current sensor 30 connected to the connector 13 should have been originally connected, and the determination result is externally determined. Can be notified. Thereby, it can prevent that the current sensor 30 which should not be connected originally can be connected, and the electric current supplied to the load 40 can be detected correctly. Further, the installation operator does not have to perform a complicated operation for confirming whether or not the current sensor 30 is correctly installed in the system to be measured.

  Note that the acquisition unit 11b does not acquire the type information of the current sensor 30 to be connected to the connector 13 from the input unit 16, but identifies the load 40 that is the measurement target corresponding to the connector 13 (load identification information). May be acquired from the input unit 16. In this case, the acquisition unit 11b displays a screen for requesting input of load identification information (at least one of the product name, product number, and type of the load 40) on the display unit 17. Here, the acquisition unit 11b displays a screen requesting input of the type of the load 40 as the load identification information. In accordance with this, the user refers to the installation data stored in the storage unit 12 shown in FIG. 3, and selects the type (for example, “main trunk”) of the load 40 corresponding to the selected connector 13 via the input unit 16. Perform the input operation. When acquiring the load identification information from the input unit 16, the acquisition unit 11 b identifies installation data having the load identification information from the installation data stored in the storage unit 12, and extracts type information from the installation data. In this way, the acquisition unit 11b may acquire the type information of the current sensor 30 to be connected to the connector 13 based on the identification information of the load 40 that is input according to the user's operation. Thereafter, as in the above embodiment, the notification control unit 11c determines the type of the current sensor 30 identified by the identification unit 11a and the type of the current sensor 30 represented by the type information acquired by the acquisition unit 11b. Determine whether they match.

  In addition, the acquisition unit 11b does not acquire the type information of the current sensor 30 to be originally connected to the selected connector 13 from the input unit 16 according to the user's operation, but instead of the installation data stored in the storage unit 12. Therefore, the type information corresponding to the selected connector 13 may be automatically acquired.

  Further, the acquisition unit 11b may acquire the information from a communication device such as a remote control device or a mobile terminal by receiving the type information wirelessly or via a network. In this case, as illustrated in FIG. 6, the power measurement device 10 includes a communication unit 21 that communicates with the communication device 50. The communication device 50 includes a control unit 51, an input unit 52, a display unit 53, a communication unit 54, and a notification unit 55. The control unit 51 of the communication device 50 controls the entire communication device 50 by controlling the input unit 52, the display unit 53, the communication unit 54, and the notification unit 55. The control unit 51 performs control to display the request data received from the power measurement device 10 via the communication unit 54 on the display unit 53. In addition, the control unit 51 performs control to transmit the type information input to the input unit 52 in accordance with a user operation to the power measurement device 10 via the communication unit 54. In addition, the control unit 51 performs control to notify the user via the notification unit 55 of whether or not the current sensor 30 is received from the power measurement device 10 via the communication unit 54. As described above, by using the communication device 50, the user can check whether the current sensor 30 connected to the connector 13 is used correctly or not even at a location away from the power measurement device 10. In this case, the power measuring apparatus 10 may omit the input unit 16, the display unit 17, and the notification unit 18 illustrated in FIG.

  In addition, as the type information of the current sensor 30, a product name, a product number, a rated current of the current transformer 31a, a product name, a product number, a resistance value, etc. of the resistor 32a may be adopted.

  Each current sensor 30 may include a storage unit that stores its type information. In this case, the acquisition unit 11 b may acquire the type information stored in the storage unit of the current sensor 30 from the current sensor 30 connected to the connector 13. In this case, the electrical signal acquisition unit 15 can be omitted in the configuration of the power measurement device 10.

  In the above case, the storage unit of each current sensor 30 may further store product-specific conversion information representing a conversion ratio, a ratio error, a phase angle, and the like. In this case, the power calculation unit 11d may acquire conversion information from the current sensor 30 connected to the connector 13, and perform a predetermined calculation related to the power to be measured based on the conversion information. When the current sensor 30 includes a temperature sensor that measures the ambient temperature, the storage unit 12 of the power measurement device 10 may store conversion information using the temperature as a parameter. Thereby, highly accurate electric power measurement which considered the temperature around the current sensor 30 can be performed.

  The power measuring device according to the present invention can be realized by a general personal computer (PC) or the like. In this case, a program for executing the operation described in the above embodiment is installed in a PC or the like, and the program or the like is executed by the PC or the like, so that it can function as the power measuring device according to the present invention. Such a program is recorded on a portable recording medium or the like and distributed. Examples of portable recording media include CD-ROM, DVD-ROM, BD-ROM, and MO.

  In addition, a method for providing a program to a PC or the like is arbitrary. For example, the program may be uploaded to a bulletin board (BBS) on a communication line and distributed to a PC or the like via the communication line. The program may be transmitted by a modulated wave obtained by modulating a carrier wave with a signal representing the program, and a device that receives the modulated wave may demodulate the modulated wave to restore the program. Then, the PC or the like activates this program and executes it like other applications under the control of the OS. Thereby, PC etc. function as a power measuring device concerning the present invention.

  In addition, the present invention is not limited by the description of the above-described embodiment and the drawings, and appropriate modifications and the like can be added to the above-described embodiment and the drawings.

  DESCRIPTION OF SYMBOLS 10 Power measuring device, 11 Control part, 11a Identification part, 11b Acquisition part, 11c Notification control part, 11d Power calculation part, 12 Storage part, 13, 13a, 13b, 13c Connector, 14, 14a, 14b, 14c, 14d A / D converter, 15 electrical signal acquisition unit, 16 input unit, 17 display unit, 18 notification unit, 19 resistance voltage dividing circuit, 20 frequency information acquisition unit, 21 communication unit, 30, 30a, 30b, 30c current sensor, 31a Current transformer, 32a resistor, 33a connector, 40, 40a, 40b, 40c load, 50 communication device, 51 control unit, 52 input unit, 53 display unit, 54 communication unit, 55 notification unit, 151, 151a, 151b, 151c resistance , 152 Multiplexer, 153 A / D converter, PW power line

Claims (7)

A connection means to which a current sensor is connected;
Identification means for identifying the type of current sensor connected to the connection means;
Acquisition means for acquiring type information representing the type of current sensor to be connected to the connection means;
Notification control means for performing control to notify the outside whether or not the type of the current sensor identified by the identification means matches the type of the current sensor represented by the type information acquired by the acquisition means And comprising
The identification means acquires an electrical signal obtained by dividing a predetermined voltage by the resistance of the current sensor connected to the connection means and the resistance inside the power measuring device, and is stored in advance. In addition, a current sensor corresponding to an electrical signal having the same magnitude as the obtained electrical signal from data in which the type of the current sensor and the electrical signal obtained when the current sensor is connected to the connection means are associated with each other. Identifying the type of current sensor connected to the connection means by selecting the type of
A power measuring device characterized by that. It further comprises input means for accepting user operation input,
The acquisition unit acquires the type information input by a user via the input unit.
The power measuring device according to claim 1. A communication means for communicating with an external communication device;
The acquisition unit acquires the type information received from the external communication device via the communication unit.
The power measuring device according to claim 1. A second storage unit that stores in advance data indicating the type information for each connection unit;
The acquisition means refers to data stored in the second storage means to acquire the type information corresponding to the connection means;
The power measuring device according to claim 1. When the notification control means determines that the type of the current sensor identified by the identification means matches the type of the current sensor represented by the type information acquired by the acquisition means, the measurement target Power calculation means for performing calculation related to the power of
The power measuring device according to claim 1, wherein the power measuring device is a power measuring device. An identifying step for identifying the type of current sensor connected to the connection;
An acquisition step of acquiring type information representing a type of a current sensor to be connected to the connection unit;
Notification control step for performing control to notify the outside whether or not the type of the current sensor identified in the identification step matches the type of the current sensor represented by the type information acquired in the acquisition step And having
In the identification step, an electrical signal obtained by dividing a predetermined voltage by the resistance of the current sensor connected to the connection portion and the resistance inside the power measuring device is acquired and stored in advance. In addition, a current sensor corresponding to an electric signal having the same magnitude as the obtained electric signal from data in which the type of the current sensor and the electric signal obtained when the current sensor is connected to the connection unit are associated with each other. Identifying the type of current sensor connected to the connection by selecting the type of
A power measurement method characterized by that. Computer
An identification means for identifying the type of the current sensor connected to the connecting portion;
Obtaining means for obtaining type information representing a type of a current sensor to be connected to the connection unit;
Notification control means for performing control to notify the outside whether or not the type of the current sensor identified by the identification means matches the type of the current sensor represented by the type information acquired by the acquisition means Function as,
The identification means acquires an electrical signal obtained by dividing a predetermined voltage by the resistance of the current sensor connected to the connection portion and the resistance inside the power measuring device, and is stored in advance. In addition, a current sensor corresponding to an electric signal having the same magnitude as the obtained electric signal from data in which the type of the current sensor and the electric signal obtained when the current sensor is connected to the connection unit are associated with each other. Identifying the type of current sensor connected to the connection by selecting the type of
A program characterized by that.

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