JP2006242598A - Electronic energy meter - Google Patents

Abstract

An electronic watt-hour meter is provided that displays an indication value for meter reading only during meter reading work.
Based on a voltage detection unit that detects a voltage of an electric wire, a current detection unit that detects a current flowing through the electric wire, a voltage detected by the voltage detection unit, and a current detected by the current detection unit, A processing unit 4 that calculates power and calculates the amount of power by calculating the power, a display unit 5 that displays an instruction value for meter reading based on the amount of power calculated by the processing unit, and a wireless within a predetermined range By transmitting / receiving a signal to / from the tag 15, the wireless tag read / write device 6 for reading the first identification information stored in the wireless tag and the first identification information read by the wireless tag read / write device are collated. And a storage unit 8 storing power second identification information, the processing unit collates the first identification information read by the wireless tag read / write device with the second identification information stored in the storage unit, and The identification information and the second identification information are one When to display the instruction value for the meter reading on the display unit.
[Selection] Figure 1

Description

  The present invention relates to an electronic watt-hour meter in which an indication value for meter reading is displayed only during meter reading work.

  In general, the electricity meter is used by the meter reader once a month to visit each customer and check the indication value displayed on the indication value screen of the electricity meter installed in each consumer. It is decided according to. Conventionally, watt-hour meters installed in ordinary homes always display an indication value for meter reading.

  In addition, as shown in FIG. 7, as a watt-hour meter installed in a factory, building, etc., a current measurement screen on which a current instruction value is displayed and an instruction value screen for meter reading are cyclically displayed at regular intervals. Things are also known.

Moreover, the periodic patrol work management method using the interrogator for making it communicate with a non-contact IC tag and a non-contact IC tag is disclosed (patent document 1). In this method, a non-contact IC tag is installed on a regular patrol target such as a meter, and a patrol person carries an interrogator for communicating with the non-contact IC tag. Also, in this method, the patrol person brings the interrogator close to the non-contact IC tag installed in the periodic patrol target, and exchanges signals between the non-contact IC tag and the interrogator. The traveling record of the tour that has been performed is taken, and this traveling record is made available to those involved in the traveling business.
JP 2003-228618 A

  However, as described above, in conventional watt-hour meters installed in ordinary households or the like, the reading value for meter reading, which is data indicating the amount of power used by each consumer, is always in an unspecified number of eyes. ing. In recent years, it has been determined that a consumer is absent or absent for a long time by looking at the reading value for meter reading of the watt-hour meter, and there has been a vacancy incident that misuses this.

  In addition, in watt-hour meters installed in factories and buildings where the current metering screen and the meter reading screen are cyclically displayed, the meter reader needs to refrain from the indicated value by looking at the screen display automatically displayed cyclically. is there. For this reason, in the watt-hour meter displayed cyclically, the efficiency of meter-reading work is bad, for example, the time for waiting for the indication value screen for meter-reading to be displayed occurs. For this reason, a watt-hour meter that displays a reading value for meter reading only during meter reading work is desired.

  Further, in the method of Patent Document 1 described above, a patrol person must carry an interrogator for exchanging signals with a non-contact IC tag installed in a periodic patrol target. In addition, the interrogator requires a circuit for transmitting a question signal to the non-contact IC tag and receiving a response signal from the non-contact IC tag, a battery for operating this circuit, and the like. The equipment becomes larger.

  An object of the present invention is to provide an electronic watt-hour meter in which an indication value for meter reading is displayed only during meter reading work.

  The present invention employs the following means in order to solve the above problems. The invention according to claim 1 is a voltage detection unit that detects a voltage of a wire, a current detection unit that detects a current flowing through the wire, a voltage detected by the voltage detection unit, and a current detected by the current detection unit. A processing unit that calculates power based on the power and calculates the amount of power by integrating the power, a display unit that displays an indication value for meter reading based on the amount of power calculated by the processing unit, and within a predetermined range The wireless tag read / write device for reading the first identification information stored in the wireless tag by transmitting / receiving a signal to / from the wireless tag in the wireless tag, and the first identification information read by the wireless tag read / write device And a storage unit storing second identification information to be collated, and the processing unit reads the first identification information read by the wireless tag read / write device and the second identification stored in the storage unit Information And, when the first identification information and the second identification information match, and wherein the displaying the indication value for the meter reading on the display unit.

  Invention of Claim 2 is the voltage detection part which detects the voltage of an electric wire, the current detection part which detects the electric current which flows through the said electric wire, the voltage detected by the said voltage detection part, and the electric current detected by the said current detection part The signal is transmitted and received between the processing unit that calculates power based on the power and calculates the amount of power by accumulating the power, and the wireless tag stored in the wireless tag. A wireless tag read / write device for reading one identification information, power amount data indicating the amount of power calculated by the processing unit, and a second identification to be collated with the first identification information read by the wireless tag read / write device When the storage unit storing information and an external meter-reading device are connected and the data recovery mode for receiving a data recovery request from the meter-reading device is valid, the power amount data stored in the storage unit A communication unit that transmits to the meter-reading device, the processing unit collates the first identification information read by the wireless tag read / write device and the second identification information stored in the storage unit, When the first identification information matches the second identification information, a signal for enabling the data collection mode is output to the communication unit.

  According to a third aspect of the present invention, in the electronic watt-hour meter according to the first aspect, the storage unit includes the second identification information to be collated with the first identification information read by the wireless tag read / write device. Storing the power amount data indicating the amount of power calculated by the processing unit, connected to an external meter-reading device, and when the data recovery mode for receiving a data recovery request from the meter-reading device is valid, the storage unit A communication unit that transmits the electric energy data stored in the meter reading device to the meter-reading device, wherein the processing unit reads the first identification information read by the wireless tag read / write device and the first information stored in the storage unit. When the first identification information matches the second identification information, the indication value for the meter reading is displayed on the display unit and the data collection mode is activated. And outputs a signal for the communication unit.

  According to the first aspect of the present invention, the wireless tag read / write device reads the first identification information stored in the wireless tag within a predetermined range, and the processing unit includes the first identification information read by the wireless tag read / write device and The second identification information stored in the storage unit is collated, and when the first identification information and the second identification information match, the indication value for meter reading is displayed on the display unit. The display unit displays the reading value for meter reading only when the meter is in the predetermined range. For this reason, it is possible to prevent a nest crime that abuses the indication value confirmation of the electricity meter. Further, it is not necessary to always display the current measurement screen and the meter reading instruction value screen alternately, and the necessary screen display can be efficiently performed according to the meter reading operation.

  According to the second aspect of the present invention, the wireless tag read / write device reads the first identification information stored in the wireless tag within a predetermined range, and the processing unit includes the first identification information read by the wireless tag read / write device and The second identification information stored in the storage unit is collated, and when the first identification information and the second identification information match, the data collection mode is validated. When an operator enters the predetermined range, the data collection mode can be validated without operating a switch or the like, and the efficiency of the data collection work is increased.

  According to the invention of claim 3, the wireless tag read / write device reads the first identification information stored in the wireless tag within a predetermined range, and the processing unit is configured to read the first identification information read by the wireless tag read / write device and The second identification information stored in the storage unit is collated, and when the first identification information and the second identification information match, the indication value for meter reading is displayed on the display unit and the data recovery mode is enabled. Therefore, only when the meter reading person carrying the wireless tag is within the predetermined range, the display unit displays the instruction value for meter reading, and the data collection mode can be validated without operation of a switch or the like. For this reason, it is possible to prevent a nest crime that abuses the indication value confirmation of the electricity meter. Further, it is not necessary to always display the current measurement screen and the meter reading instruction value screen alternately, and the necessary screen display can be efficiently performed according to the meter reading operation. In addition, the efficiency of data collection work is increased.

  Hereinafter, an electronic watt-hour meter according to an embodiment of the present invention will be described in detail with reference to the drawings.

  The electronic watt-hour meter according to the first embodiment of the present invention is characterized in that an indication value for meter reading is displayed when a meter reading person carrying a wireless tag approaches the electronic watt-hour meter.

  FIG. 1 is a block diagram showing a configuration of an electronic watt-hour meter according to Embodiment 1 of the present invention. As shown in FIG. 1, an electronic watt-hour meter 10 according to Embodiment 1 of the present invention includes a voltage detection unit 1, a current detection unit 2, a power calculation unit 3, a central calculation processing unit 4, a display unit 5, and an antenna 6. The transmission / reception circuit 7 and the storage unit 8 are included. The antenna 6 and the transmission / reception circuit 7 constitute a wireless tag read / write device 16.

  The voltage detector 1 detects the voltage of the electric wire, and the current detector 2 detects the current flowing through the electric wire. The power calculation unit 3 calculates power based on the voltage detected by the voltage detection unit 1 and the current detected by the current detection unit 2, and the central processing unit 4 calculates the power calculated by the power calculation unit 3. Accumulate and calculate the amount of power. The power amount data indicating the calculated power amount is stored in the storage unit 8.

  The transmission / reception circuit 7 of the wireless tag read / write device 16 wirelessly transmits a wireless tag read signal to the wireless tag 15 via the antenna 6 and receives a response signal from the wireless tag 15 via the antenna 6. This wireless tag reading signal is a signal for requesting the identification ID stored in the wireless tag 15. The response signal is an identification ID of the wireless tag 15 that the wireless tag 15 transmits in response to the wireless tag reading signal.

  The wireless tag read / write device 16 transmits a wireless tag read signal to the wireless tag 15 by the transmission / reception circuit 7 and receives a response signal from the wireless tag 15, thereby identifying the identification ID of the wireless tag 15 (first identification of the present invention). Information).

  The storage unit 8 includes a specific identification ID (the present invention) to be collated with the identification ID of the wireless tag 15 read by the wireless tag read / write device 16 together with the electric energy data indicating the electric energy calculated by the central processing unit 4. 2nd identification information). The central processing unit 4 collates the identification ID of the wireless tag 15 read by the wireless tag read / write device 16 with the identification ID stored in the storage unit 8.

  When the identification ID read by the wireless tag reader / writer 16 matches the identification ID stored in the storage unit 8 (hereinafter referred to as detecting the wireless tag 15), the central processing unit 4 An indication value for meter reading based on the electric energy calculated by the arithmetic processing unit 4 is displayed.

  When the wireless tag read / write device 16 detects the wireless tag 15, the identification ID and detection time of the wireless tag 15 can be stored in the storage unit 8. At this time, the wireless read / write device 16 can write information such as the identification ID of the watt-hour meter in which the meter is read and the date and time when the meter is read into a memory (not shown) of the wireless tag 15. In this way, by storing the watt-hour meter identification ID and the date and time of meter reading in the memory of the wireless tag 15, it is possible to record the work of the meter reader in the wireless tag 15.

  FIG. 2 is a view showing a response meter-reading system using the electronic watt-hour meter 10 and the wireless tag 15 according to the first embodiment of the present invention, and FIG. 3 is an electronic watt-hour meter 10 according to the first embodiment of the present invention. It is a flowchart which shows this operation | movement.

  As shown in FIG. 2, the electronic watt-hour meter 10 according to the first embodiment of the present invention transmits a wireless tag reading signal in the wireless tag communication area 11. This wireless tag communicable area 11 is a range in which the wireless tag read / write device 16 can read the identification ID of the wireless tag 15, and is substantially the same as the work area used by the meter reader 9 during the meter reading work of the electronic watt-hour meter 10. It is set to be in the range. The meter reader 9 carries a handy terminal 14a for storing an indication value of the electronic watt-hour meter 10 and a wireless tag 15 in which an identification ID that matches the identification ID stored in the storage unit 8 is stored.

  Next, the operation of the electronic watt-hour meter according to the first embodiment of the present invention will be described in detail with reference to FIGS. 2 and 3. When the meter reader 9 carrying the wireless tag 15 is outside the wireless tag communication area 11 of the wireless tag read / write device 16 of the electronic watt-hour meter 10, the display unit 5 displays the screen non-display state or the current instruction value. (Step S11).

  When the meter reader 9 carrying the wireless tag 15 enters the wireless tag communication area 11 of the wireless tag reader / writer 16 of the electronic watt-hour meter 10, the wireless tag reader / writer 16 detects the wireless tag 15 (step S12). ) The display unit 5 displays the reading value for meter reading (step S13).

  When the meter reader 9 carrying the wireless tag 15 goes out of the wireless tag communication area 11 of the wireless tag reader / writer 16 and the wireless tag reader / writer 16 no longer detects the wireless tag 15, the display unit 5 The display state or the current instruction value display is restored (step S14).

  As described above, in the electronic watt hour meter according to the first embodiment of the present invention, the wireless tag read / write device 16 reads the identification ID stored in the wireless tag 15 in the wireless tag communicable area 11 and performs central processing. The unit 4 compares the identification ID read by the wireless tag read / write device 16 with the identification ID stored in the storage unit 8, and the identification ID read by the wireless tag read / write device 16 and the identification stored in the storage unit 8. When the ID matches, the indication value for meter reading is displayed on the display unit 5, so that the display unit 5 is displayed only when the meter reader 9 carrying the wireless tag 15 is in the RFID tag communicable area 11. The indicated value for meter reading is displayed.

  For this reason, it is possible to prevent a nest crime that abuses the indication value confirmation of the electricity meter. Further, it is not necessary to always display the current measurement screen and the meter reading instruction value screen alternately, and the necessary screen display can be efficiently performed according to the meter reading operation.

  The electronic watt-hour meter according to the second embodiment of the present invention enables a data collection mode for accepting a meter reading data collection request from an external meter-reading device when a meter reader carrying a wireless tag approaches. Features.

  FIG. 4 is a block diagram showing a configuration of an electronic watt-hour meter according to Embodiment 2 of the present invention. As shown in FIG. 4, the electronic watt-hour meter 10 according to the second embodiment includes a communication unit 13. The other configuration is the same as the configuration of the electronic watt-hour meter 10 according to the first embodiment shown in FIG.

  When the identification ID read by the wireless tag read / write device 16 matches the identification ID stored in the storage unit 8, the central processing unit 4a issues a data collection request from an external meter-reading device (for example, a handy terminal). A signal for enabling the accepted data collection mode is output to the communication unit 13.

  The communication unit 13 is connected to the meter-reading device and accepts a data collection request from the meter-reading device when the data collection mode is valid, and transmits the power amount data stored in the storage unit 8 to the meter-reading device. .

  FIG. 5 is a view showing a response meter-reading system using the electronic watt-hour meter 10 and the wireless tag 15 according to the second embodiment of the present invention, and FIG. 6 is an electronic watt-hour meter 10 according to the second embodiment of the present invention. It is a flowchart which shows this operation | movement.

  As shown in FIG. 5, the electronic watt-hour meter 10 according to the second embodiment of the present invention transmits a wireless tag reading signal in the wireless tag communication area 11. The meter reader 9 carries a handy terminal 14b for collecting the indicated value of the electronic watt-hour meter 10 by communication and a wireless tag 15 storing an identification ID that matches the identification ID stored in the storage unit 8. Yes. The handy terminal 14 b is connected to the watt hour meter 10 via the cable 12.

  Next, the operation of the electronic watt-hour meter according to the second embodiment of the present invention will be described in detail with reference to FIGS. 5 and 6. When the meter reader 9 carrying the wireless tag 15 is outside the wireless tag communication area 11 of the wireless tag reader / writer 16 of the electronic watt-hour meter 10, the electronic watt-hour meter 10 is in the normal mode (step S21). In this normal mode, communication cannot be performed between the electronic watt-hour meter 10 and the handy terminal 14b.

  When the meter reader 9 carrying the wireless tag 15 enters the wireless tag communication area 11 of the wireless tag reader / writer 16 of the electronic watt-hour meter 10, the wireless tag reader / writer 16 detects the wireless tag 15 (step S22). ), The data recovery mode of the electronic watt-hour meter 10 becomes valid (step S23).

  When the meter reader 9 carrying the wireless tag 15 goes out of the wireless tag communication area of the wireless tag reader / writer 16 and the wireless tag reader / writer 16 no longer detects the wireless tag 15, the electronic watt-hour meter 10 Return to the normal mode (step S24).

  As described above, in the electronic watt hour meter according to the second embodiment of the present invention, the wireless tag read / write device 16 reads the identification ID stored in the wireless tag 15 in the wireless tag communicable area 11 and performs central processing. The unit 4a collates the identification ID read by the wireless tag read / write device 16 with the identification ID stored in the storage unit 8, and the identification ID read by the wireless tag read / write device 16 and the identification stored in the storage unit 8 Since the data collection mode is enabled when the ID matches, the meter reader 9 carrying the wireless tag 15 enters the wireless tag communicable area 11 at the time of meter reading work, so that data can be obtained without operating a switch or the like. The collection mode can be enabled, and the efficiency of data collection work is increased.

  In addition, the same effect as the effect of Example 2 can be obtained also in Example 1 by providing the communication unit 13 in the electronic watt-hour meter 10 of Example 1 and operating the same as the operation of Example 2. it can.

  The present invention can be used by various consumers as an electronic watt-hour meter for measuring electric power.

It is a block diagram which shows the structure of the electronic watt-hour meter which concerns on Example 1 of this invention. It is a figure which shows the response meter-reading system using the electronic watt-hour meter and wireless tag which concern on Example 1 of this invention. It is a flowchart which shows operation | movement of the electronic watt-hour meter which concerns on Example 1 of this invention. It is a block diagram which shows the structure of the electronic watt-hour meter which concerns on Example 2 of this invention. It is a figure which shows the response meter-reading system using the electronic watt-hour meter and wireless tag which concern on Example 2 of this invention. It is a flowchart which shows operation | movement of the electronic watt-hour meter which concerns on Example 2 of this invention. It is a screen transition diagram of a conventional electronic watt-hour meter.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Voltage detection part 2 ... Current detection part 3 ... Electric power calculating part 4, 4a ... Central arithmetic processing part 5 ... Display part 6 ... Antenna 7 ... Transmission / reception circuit 8 ... Memory | storage part 9 ... Meter reader 10 ... Electronic watt-hour meter 11 ... Radio tag communicable area 12 ... Cable 13 ... Communication units 14a, 14b ... Handy terminal 15 ... Radio tag 16 ... Radio tag read / write device

Claims (3)

A voltage detector for detecting the voltage of the electric wire;
A current detector for detecting a current flowing through the wire;
A processing unit that calculates power based on the voltage detected by the voltage detection unit and the current detected by the current detection unit, and calculates the amount of power by integrating the power;
A display unit for displaying an instruction value for meter reading based on the electric energy calculated by the processing unit;
A wireless tag read / write device for reading first identification information stored in the wireless tag by transmitting / receiving a signal to / from a wireless tag within a predetermined range;
A storage unit storing second identification information to be checked against the first identification information read by the wireless tag read / write device;
With
The processor is
When the first identification information read by the wireless tag read / write device and the second identification information stored in the storage unit are collated, and the first identification information and the second identification information match, An electronic watt-hour meter that displays the reading value for meter reading on the display unit. A voltage detector for detecting the voltage of the electric wire;
A current detector for detecting a current flowing through the wire;
A processing unit that calculates power based on the voltage detected by the voltage detection unit and the current detected by the current detection unit, and calculates the amount of power by integrating the power;
A wireless tag read / write device for reading first identification information stored in the wireless tag by transmitting / receiving a signal to / from a wireless tag within a predetermined range;
A storage unit that stores power amount data indicating the amount of power calculated by the processing unit and second identification information to be collated with the first identification information read by the wireless tag read / write device;
A communication unit that transmits power amount data stored in the storage unit to the meter-reading device when an external meter-reading device is connected and a data recovery mode for receiving a data recovery request from the meter-reading device is valid When,
With
The processor is
When the first identification information read by the wireless tag read / write device and the second identification information stored in the storage unit are collated, and the first identification information and the second identification information match, An electronic watt-hour meter that outputs a signal for enabling the data recovery mode to the communication unit. The storage unit
Storing power amount data indicating the amount of power calculated by the processing unit together with the second identification information to be checked against the first identification information read by the wireless tag read / write device;
A communication unit that is connected to an external meter-reading device and transmits power amount data stored in the storage unit to the meter-reading device when a data recovery mode for receiving a data recovery request from the meter-reading device is valid Further comprising
The processor is
When the first identification information read by the wireless tag read / write device and the second identification information stored in the storage unit are collated, and the first identification information and the second identification information match, The electronic watt-hour meter according to claim 1, wherein an indication value for meter reading is displayed on the display unit and a signal for enabling the data collection mode is output to the communication unit.

Images