JP2005181053A - Watt-hour meter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a watt-hour meter exceeding the term of validity of official approval from being used for charge transactions. <P>SOLUTION: This watt-hour meter 15 is equipped in one mode with input/output terminals 4, 7 of supplying power to a load 3, a means 16 of detecting electrical energy used in the load 3, a means 18c of accumulating the electrical energy detected by the detection means 16 and determining consumed electrical energy, a means 13 for displaying the consumed electrical energy, a means 18a for clocking the present time, a means 18d of determining whether the present time is within the term of validity shown by data of the term of validity, and a display control means 18g for stopping display operation by the display means 13, when the present time is not with in the term of validity. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an amount of electric power for measuring the amount of electric power used.

  Generally, when electricity is supplied from an electricity supplier to an electricity consumer, the electricity meter measures and displays the amount of power used by the consumer.

  FIG. 5 is a block diagram showing an example of a conventional watt-hour meter.

  The watt-hour meter 1 is an electronic watt-hour meter. The watt-hour meter 1 measures the amount of power supplied from the power supply facility 2 to the load 3.

  The input terminal 4 of the power meter 1 is connected to the power supply facility 2 and the distribution line 5. The input terminal 4 can energize one end of the first electric wire 5a included in the distribution line 5 and one end of the internal conductor 6a, and energize one end of the second electric wire 5b included in the distribution line 5 and one end of the internal conductor 6b. Make it possible.

  The output terminal 7 of the power meter 1 is connected to the load 3 and the distribution line 8. The output terminal 7 can energize one end of the first electric wire 8a included in the distribution line 8 and the other end of the internal conductor 6a, and one end of the second electric wire 8b included in the distribution line 8 and the other end of the internal conductor 6b. Can be energized.

  That is, the input terminal 4 and the output terminal 7 of the power meter 1 are connected by the internal conductors 6a and 6b of the watt hour meter 1.

  Inside the watt hour meter 1, the voltage detection unit 9 detects a voltage component with respect to the power supplied from the power supply facility 2 to the load 3 as an electric signal from the input terminal 4. For example, the voltage detector 9 detects the voltage between the internal conductors 6a and 6b.

  The current detection unit 10 detects a current component from the internal conductor 6a as an electric signal.

  The power calculation unit 11 calculates the amount of power based on the electrical signal of the voltage component and the electrical signal of the current component.

  The central processing unit 12 accumulates the calculated power amount and sets it as the used power amount.

  The power amount display unit 13 displays the amount of power used.

  FIG. 6 is a front view showing an example of a conventional watt-hour meter 1.

  The watt-hour meter 1 is a specific measuring instrument used for electric power charge transactions, and the certification validity period is determined when the certification is passed. The certification label 14 attached to the front of the watt-hour meter 1 represents the certification expiration date.

Patent Document 1 (Japanese Patent Application Laid-Open No. 2000-81450) discloses a watt-hour meter that displays that the test has expired when the test validity period has elapsed.
JP 2000-81450 A

  In the conventional watt-hour meter 1 described above, the metering operation is continued even if the verification valid period is exceeded. In this case, if the business operator who maintains the watt-hour meter 1 neglects the management, there is a problem that the watt-hour meter 1 that has passed the verification valid period is used in the power charge transaction.

  The watt-hour meter disclosed in Patent Document 1 indicates that the verification is expired, but the metering operation is continued even after the verification valid period has elapsed.

  Therefore, even when the watt-hour meter disclosed in Patent Document 1 is used, there is a possibility that the watt-hour meter that exceeds the verification valid period in the power charge transaction may be used.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a watt-hour meter that prevents use in electric power charge transactions when the verification valid period is exceeded.

  Specific means taken for realizing the present invention will be described below.

  The first example of the present invention is an input / output terminal for supplying power to a load, means for detecting the amount of power used in the load, and accumulating the amount of power detected by the detecting means, Means for determining, means for displaying the amount of power used, means for timing the current time, means for determining whether the current time is within the valid period indicated by the valid period data, and if the current time is not within the valid period, It is a watt hour meter provided with the display control means to stop the display operation by a display means.

  The second example of the present invention is an input / output terminal for supplying power to a load, a means for detecting the amount of power used in the load, and a cumulative amount of power detected by the detecting means, Means for obtaining, means for displaying the amount of power used, means for timing the time, and whether the accumulated time from passing the test obtained based on the timing means has exceeded the effective accumulated time indicated by the effective accumulated time data And a display control means for stopping the display operation by the display means when the cumulative time exceeds the effective cumulative time.

  In the present invention, it is possible to prevent a watt-hour meter whose expiration date has been exceeded from being used for a power charge transaction.

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

(First embodiment)
In the present embodiment, an electronic watt-hour meter that measures and displays the amount of power used by a consumer when electricity is supplied from the electricity supplier to the electricity consumer will be described.

  In the present embodiment, a watt-hour meter that stops displaying the amount of power used when the current time exceeds the verification valid period will be described.

  FIG. 1 is a block diagram showing an example of a watt-hour meter according to the present embodiment.

  The watt hour meter 15 includes an input terminal 4, an output terminal 7, internal conductors 6 a and 6 b, a power detection unit 16, a communication terminal 17, a central processing unit 18, a recording unit 19, a power amount display unit 13, and a switch 20.

  For example, the power detection unit 16 detects power by the voltage detection unit 9, the current detection unit 10, and the power calculation unit 11.

  In addition, the input terminal 4, the inner conductors 6a and 6b, the output terminal 7, the voltage detection unit 9, the current detection unit 10, the power calculation unit 11, the power amount display unit 13, and the power supply facility in the watt-hour meter 15 in FIG. Since 2, load 3, distribution lines 5 and 8 are the same as those in FIG.

  For the recording unit 19, for example, a nonvolatile memory, a hard disk, or the like is used.

  The communication terminal 17 is a terminal for receiving various data from the outside via the communication line 17a and transmitting various data from the inside to the outside via the communication line 17a. For example, the communication terminal 17 receives pass data indicating that the test has passed through the communication line 17a.

  The central processing unit 18 includes a timing unit 18a, a test pass detection unit 18b, an accumulation unit 18c, a determination unit 18d, a recording processing unit 18e, a data output unit 18f, and a display control unit 18g. Note that the processing by the central processing unit 18 may be realized using software.

  The time measuring unit 18a measures the current time.

  The test pass detection unit 18b detects the test pass when the pass data received at the communication terminal 17 is input.

  Then, when the test is passed, the test pass detection unit 18b determines the test valid period based on the current time measured by the time measuring unit 18a, and creates valid period data indicating the test valid period. For example, when the rated voltage used alone is a watt-hour meter having a rated voltage of 300 V or less, the test pass detection unit 18b determines the period until 10 years have passed from the test pass as the test valid period.

  The accumulating unit 18c accumulates the power amount calculated by the power calculating unit 11 to obtain the used power amount, and creates used power amount data indicating the used power amount.

  The determination unit 18d compares the test effective period indicated by the effective period data created by the test pass detection unit 18b with the current time measured by the time measuring unit 18a, and whether or not the current time is included in the test effective period. Judge.

  The recording processing unit 18e records the power consumption data created by the accumulating unit 18c in the recording unit 19 when the determining unit 18d determines that the current time is not included in the valid test period.

  The data output unit 18 f outputs the power consumption data recorded in the recording unit 19 to the outside via the communication terminal 17 in accordance with the data output command. The data output command is input via the communication terminal 17, for example.

  When the determination unit 18d determines that the current time is included in the valid test period, the display control unit 18g displays the used power amount indicated by the used power amount data generated by the accumulating unit 18c in the power amount display unit 13. Display.

  On the other hand, when the current time is not within the valid period, the display control unit 18g stops the display operation by the power amount display unit 13. In the present embodiment, the display control unit 18g outputs a display stop command to the power amount display unit 13 when the current time is not within the valid period.

  Further, when the switch 20 is turned on, the display control unit 18g reads the used power amount data recorded in the recording unit 19 and causes the power amount display unit 13 to display the used power amount.

  In accordance with display control by the display control unit 18g, the power amount display unit 13 displays the used power amount indicated by the used power amount data, and stops the display when a display stop command is input.

  An outline of the operation of the watt-hour meter 15 according to the present embodiment will be described.

  The central processing unit 18 receives pass data indicating that the test has passed from the communication terminal 17 and calculates the test valid period.

  In order to detect the amount of power used by the consumer, the voltage detector 9 of the watt hour meter 15 detects the voltage component from the input terminal 4 as an electrical signal, and the current detector 10 detects the current component from the internal conductor 6a. Detect as an electrical signal.

  Thereafter, the power calculation unit 11 calculates the amount of power from the product of the voltage component and the current component, the central calculation unit 18 takes in the power amount and accumulates it as the used power amount, and the power amount display unit 13 Display quantity.

  The central processing unit 18 compares the current time with the test effective period, and stops the display of the electric energy display unit 13 when the current time exceeds the test effective period.

  After the verification valid period is exceeded, the central processing unit 18 records the power consumption data indicating the power consumption in the recording unit 19 and outputs it via the communication terminal 17 as necessary.

  When the switch 20 is turned on after the verification valid period has elapsed, the central processing unit 18 displays the used power amount indicated by the used power amount data recorded in the recording unit 19 on the power amount display unit 13. Let

  FIG. 2 is a flowchart showing an example of processing by the watt-hour meter 15 according to the present embodiment.

  In step S1, the time measuring unit 18a starts measuring the current time.

  In step S2, the test pass detection unit 18b receives the pass data using the communication terminal 17, and detects the test pass based on the pass data.

  In step S3, the test pass detection unit 18b determines the test valid period.

  In step S <b> 4, the power detection unit 16 detects the amount of power used in the load 3.

  In step S5, the accumulating unit 18c accumulates the detected power amount, obtains the used power amount, and creates the used power amount data.

  In step S6, the determination unit 18d compares the valid test period with the current time, and determines whether the current time is within the valid test period.

  If the current time is within the verification valid period, in step S7, the display control unit 18g causes the power amount display unit 13 to display the power consumption amount. Thereafter, the process returns to step S4.

  If the current time is not within the verification validity period, step S8 and subsequent steps are executed.

  In step S8, the display control unit 18g stops the display by the power amount display unit 13.

  In step S <b> 9, the recording processing unit 18 e records power consumption data in the recording unit 19.

  In step S10, the data output unit 18f determines whether or not a data output command has been input.

  When a data output command is input, the data output unit 18f outputs the power consumption data recorded in the recording unit 19 via the communication terminal 17 in step S11.

  In step S12, the display control unit 18g determines whether or not the switch 20 is in the ON state.

  When the switch 20 is in the ON state, in step S13, the display control unit 18g causes the power amount display unit 13 to display the used power amount indicated by the used power amount data recorded in the recording unit 19.

  In step S14, the watt-hour meter 15 repeats the processing from step S8 onward until the operation is finished.

  Note that the order of steps S10 and S11 and steps S12 and S13 may be reversed.

  In the present embodiment described above, since the amount of power used is not displayed when the verification valid period is exceeded, a person who performs meter reading of the amount of power used cannot know the amount of power used. Therefore, the use of a watt-hour meter that exceeds the verification valid period is limited, and appropriate power trading can be realized.

  In the present embodiment, since the display is stopped, the person who performs meter reading can clearly and easily know that the verification expiration date of the watt-hour meter 15 has been exceeded.

  In the present embodiment, since the display is stopped after the verification valid period is exceeded, the power consumed by the watt-hour meter 15 after the verification valid period is exceeded can be reduced.

  Moreover, in this Embodiment, the watt-hour meter 15 can be reused easily and rapidly by inputting verification pass data again after the verification effective period is exceeded.

  In the present embodiment, the power consumption data is recorded in the recording unit 19 when the current time exceeds the verification valid period. However, even if the current time does not exceed the verification valid period, the recording processing unit 18e can output the power consumption data via the communication terminal 17 by recording the power consumption data in the recording unit 19. It is good.

(Second Embodiment)
In the present embodiment, a watt-hour meter that stops displaying the amount of power to be used when the accumulated time from when the certification has passed exceeds the certification effective cumulative time will be described. In the present embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  FIG. 3 is a block diagram showing an example of a watt-hour meter according to the present embodiment.

  The watt-hour meter 21 is different from the watt-hour meter 15 described in the first embodiment in the central processing unit. The central calculator 22 of the watt-hour meter 21 includes a timer 18a, a test pass detector 22a, an accumulator 18c, a determiner 22b, a recording processor 22c, a data output unit 18f, and a display controller 22d.

  The test pass detection unit 22a detects the test pass when the pass data received at the communication terminal 17 is input.

  The determination unit 22b obtains the accumulated time after the test pass detection is detected by the test pass detection unit 22a based on the current time measured by the clock unit 18a.

  Then, the determination unit 22b compares the accumulated time from when the certification is passed with the effective accumulated time indicated by the effective accumulated time data, and determines whether or not the accumulated time exceeds the effective accumulated time. Here, it is assumed that the effective cumulative time is the time from when the certification is passed to the last date and time of the effective period. For example, in the case of a watt-hour meter with a rated voltage of 300 V or less used independently, 10 years is determined as the certification effective cumulative time.

  The recording processing unit 22c records, in the recording unit 19, the power consumption data created by the accumulating unit 18c when the determining unit 22b determines that the accumulated time has exceeded the valid test accumulated time.

  When the display control unit 22d and the determination unit 22b determine that the accumulated time does not exceed the valid test accumulated time, the used power amount indicated by the used power amount data created by the accumulating unit 18c is displayed on the power amount display unit 13. Let

  On the other hand, the display control unit 22d stops the display operation by the power amount display unit 13 when it is determined that the accumulated time exceeds the verification effective accumulated time.

  Further, when the switch 20 is turned on, the display control unit 22d reads the used power amount data recorded in the recording unit 19 and causes the power amount display unit 13 to display the used power amount.

  An outline of the operation of the watt-hour meter 21 according to the present embodiment will be described.

  The central processing unit 22 receives pass data indicating that the test has passed from the communication terminal 17, and obtains the accumulated time from the test pass.

  Then, the central processing unit 22 stops the display of the used electric energy by the electric energy display unit 13 when the accumulated time exceeds the test effective accumulated time.

  After the accumulated time exceeds the test valid accumulated time, the central processing unit 22 records the power consumption data in the recording unit 19 and outputs it via the communication terminal 17 as necessary.

  FIG. 4 is a flowchart showing an example of processing by the watt-hour meter 21 according to the present embodiment.

  Step T1 is the same as step S1 in the first embodiment.

  In step T2, the test pass detection unit 22a receives the pass data using the communication terminal 17, and detects the test pass based on the pass data.

  Steps T3 and T4 are the same as steps S4 and S5 in the first embodiment.

  In step T5, the determination unit 22b calculates the accumulated time.

  In step T6, the determination unit 18d compares the accumulated time with the test effective cumulative time, and determines whether or not the cumulative time has exceeded the test valid cumulative time.

  When the accumulated time does not exceed the test effective accumulated time, the display control unit 22d causes the power amount display unit 13 to display the used power amount in Step T7. Thereafter, the process returns to step T3.

  When the accumulated time exceeds the valid test accumulated time, step T8 and subsequent steps are executed.

  In step T8, the display control unit 22d stops the display by the power amount display unit 13.

  Steps T9 to T11 are the same as steps S9 to S11 in the first embodiment.

  In step T12, the display control unit 22d determines whether or not the switch 20 is in the ON state.

  When the switch 20 is in the ON state, in step T13, the display control unit 22d causes the power amount display unit 13 to display the used power amount indicated by the used power amount data recorded in the recording unit 19.

  In step T14, the watt-hour meter 21 repeats the processing from step T8 onward until the operation is completed.

  The order of step T5 and steps T3 and T4 may be reversed or may be executed in parallel.

  Further, the order of steps T10 and T11 and steps T12 and T13 may be reversed.

  In the present embodiment described above, the amount of power used is not displayed when the accumulated time after passing the certification exceeds a predetermined valid certification accumulation time. For this reason, the effect similar to the said 1st Embodiment can be acquired.

  Moreover, in this Embodiment, even if it changes the present time time-measured by the time measuring part 18a, use of the watt-hour meter 15 exceeding the period which can be utilized effectively can be restrict | limited, and an appropriate electric power transaction can be implement | achieved.

  In the present embodiment, the test effective accumulation time may be set in advance, or may be set by the processing of the central processing unit 22.

  INDUSTRIAL APPLICABILITY The present invention is effective in the field of watt hour meters that measure the amount of power used by consumers when electricity is supplied from electricity suppliers to electricity consumers.

The block diagram which shows an example of the watt-hour meter which concerns on the 1st Embodiment of this invention. The flowchart which shows an example of the process by the watt-hour meter which concerns on the same embodiment. The block diagram which shows an example of the watt-hour meter which concerns on the 2nd Embodiment of this invention. The flowchart which shows an example of the process by the watt-hour meter which concerns on the same embodiment. The block diagram which shows an example of the conventional watt-hour meter. The front view which shows an example of the conventional watt-hour meter.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,15,21 ... Electricity meter, 2 ... Electric power supply equipment, 3 ... Load, 4 ... Input terminal, 5, 8 ... Distribution line, 5a, 8a ... 1st electric wire, 5b, 8b ... 2nd electric wire, 6a, 6b ... Internal conductor, 7 ... Output terminal, 9 ... Voltage detection unit, 10 ... Current detection unit, 11 ... Power calculation unit, 12, 18, 22 ... Central calculation unit, 13 ... Power amount display unit, 16 ... Power detection unit , 17: Communication terminal, 18a: Timekeeping unit, 18b, 22a ... Test pass detection unit, 18c ... Accumulation unit, 18d, 22b ... Judgment unit, 18e, 22c ... Recording processing unit, 18f ... Data output unit, 18g, 22d ... Display control unit, 19 ... recording unit, 20 ... switch

Claims (8)

Input / output terminals for supplying power to the load;
Means for detecting the amount of power used in the load;
Means for accumulating the amount of electric power detected by the detecting means to determine the amount of electric power used;
Means for displaying the power consumption;
A means of measuring the current time;
Means for determining whether the current time is within an effective period indicated by effective period data;
A watt-hour meter comprising: display control means for stopping display operation by the display means when the current time is not within the valid period. The watt-hour meter according to claim 1,
A communication terminal for receiving pass data indicating that the test has passed via a communication line;
A watt hour meter further comprising means for creating the effective period data indicating an effective period determined when the test is passed when the pass data is received. The watt-hour meter according to claim 1,
A communication terminal;
Means for recording power consumption data indicating the power consumption when the current time is not within the valid period;
A watt hour meter further comprising means for reading out the used power amount data and outputting the used power amount data via the communication terminal when a data output command is input. The watt-hour meter according to claim 1,
A switch,
If the current time is not within the valid period, further comprising means for recording power consumption data indicating the power consumption,
The watt-hour meter characterized in that the display control means reads out the used power amount data recorded by the recording means and displays the data by the display means when the switch is turned on. Input / output terminals for supplying power to the load;
Means for detecting the amount of power used in the load;
Means for accumulating the amount of electric power detected by the detecting means to determine the amount of electric power used;
Means for displaying the power consumption;
A means of measuring time,
Means for determining whether the accumulated time from the time of passing the test obtained based on the time measuring means exceeds the effective accumulated time indicated by the effective accumulated time data;
A watt-hour meter comprising: display control means for stopping display operation by the display means when the cumulative time exceeds the effective cumulative time. The watt-hour meter according to claim 5,
It further comprises a communication terminal for receiving pass data indicating that the test has passed through the communication line,
The determination unit sets the time when the acceptance data is received as the time when the certification is passed. The watt-hour meter according to claim 5,
A communication terminal;
Means for recording power consumption data indicating the power consumption when the cumulative time exceeds the effective cumulative time;
A watt hour meter further comprising means for reading out the used power amount data and outputting the used power amount data via the communication terminal when a data output command is input. The watt-hour meter according to claim 5,
A switch,
Means for recording power consumption data indicating the power consumption when the cumulative time exceeds the effective cumulative time;
The watt-hour meter characterized in that the display control means reads out the used power amount data recorded by the recording means and displays the data by the display means when the switch is turned on.

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