JPH07191067A - Electronic watt-hour meter and its management system - Google Patents

Abstract

PURPOSE:To easily and automatically manage the expiration date of the validity time of an electronic watt-hour meter which is a measuring instrument for a business agreement. CONSTITUTION:An electronic watt-hour meter provided with a powerfrequency converting section 4 which finds electric power from the product of the voltage and current of a load and outputs the electric power after converting the power into a frequency and a central processing section 5 which adds up the frequencies outputted from the converting section 4 and outputs the sum as electric energy is further provided with a nonvolatile memory 9 which stores the data about the expiration date of the validity time of the meter, input-output means 7 for exchanging the data with the outside, and writing/reading means 5 which writes and reads data in and from the memory 9 so that the data about the expiration date of the validity time can be stored in the meter itself in a state where the data can be read out from the memory 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used as a basis for allocating electricity charges between transaction companies between electric power companies and electric power consumers, or between owners and residents of buildings and condominiums. The present invention relates to an improvement of an electronic watt hour meter as a transaction certifying instrument and its management system.

[0002]

2. Description of the Related Art For example, in a tenant building, the owner of the tenant building makes a collective contract with an electric power company regarding the use of electric power, and pays the electricity charge used for the entire tenant building. On the other hand, when paying the electricity charges between the tenant building owner and each resident, a transaction proof meter (electric energy meter) attached to each tenant
The power usage fee is paid by allocating based on the measured value of.

When installing and using the instruments used as the basis for these fee transactions, it is obligatory to use the instruments that have been subjected to predetermined certification in advance by a public certification body.

Therefore, as the owner of the tenant building, it is necessary to manage the expiration date of the verification valid period of the meter installed in each tenant unit, but as shown in FIG. Depends on the type.

[0005]

Therefore, when the tenant building owner manages these instruments, depending on the tenant, the capacity of the instrument may change due to an increase or change in the type of electrical equipment used, In some cases, it may be necessary to replace the instrument due to the replacement of
If you want to manage the validity period of each instrument, it is necessary to check the instrument's certification label, certification sheet, or collation number for each tenant, and periodically check the expiration date of the validation period. Therefore, it is a time-consuming and laborious task to always perform these management tasks accurately. Conventionally, the management of these transaction certifying instruments has been performed by managing with a ledger, by entering data into a personal computer, or by outsourcing the management to an external service institution. It was sometimes forgotten, and required a certain amount of money.

An object of the present invention is to solve the above-mentioned problems, and to easily and automatically manage the expiration date of the verification valid period of an electronic watt-hour meter which is a transaction certifying instrument. It is to provide a meter and the management system.

[0007]

The present invention according to claim 1 obtains electric power from a product of voltage and current of a load, converts the electric power into a frequency proportional to the electric power, and outputs the electric power-frequency converter.
In an electronic watt-hour meter having a central processing unit that integrates the output frequencies of the power-frequency conversion unit and outputs as a power amount, a non-volatile memory that stores data of the expiration date of the verification valid period, and the data. And an external input / output unit for exchanging the data, and a writing / reading unit for writing and reading the data in the nonvolatile memory.

The present invention according to claim 2 has a plurality of claims 1
The electronic watt-hour meter described is connected to a control device via a communication means, and the control device transmits to each of the plurality of electronic watt-hour meters data of the expiration date of the certification valid period together with a write command, and reads the data. Provided with a transmission / reception means for receiving the data of the expiration date of the certification valid period from each of the plurality of electronic watt-hour meters corresponding to the transmission of the command, and a processing means for processing the received data of the expiration date of the certification valid period. ing.

[0009]

1 is a block diagram showing an electronic watt-hour meter, which is an embodiment of the present invention. The electronic watt hour meter 1
By the voltage transformer (PT) 2 and the current transformer (CT) 3,
Each voltage and current value in the load power line is measured, and the value is input to the power-frequency conversion unit 4, and
The frequency converter 4 outputs a frequency proportional to the electric power used to the central processing unit 5.

The central processing unit 5 momentarily integrates the amount of electric power based on the input frequency, displays it on the display unit 6, and is constituted by a personal computer or the like via the communication line 8 from the input / output unit 7. The metering data is output to the control device 10 (FIG. 3).

The electronic watt hour meter 1 is EEPRO.
RAM backed up by M, core memory, battery
A non-volatile memory 9 formed by, for example, is stored in the non-volatile memory 9. The non-volatile memory 9 stores data on the expiration date of the valid period of the test. The non-volatile memory 9 may be external to the central processing unit 5, built-in, or built in the input / output unit 7.

FIG. 2 is a block diagram showing a flow from the ordering to the installation of the electronic watt hour meter 1 which is an embodiment of the present invention in the case of a single meter.

A so-called building automation company orders an instrument from the instrument manufacturer in step 1, and responds to this in step 2 by the instrument manufacturer having a predetermined specification (electronic watt-hour meter 1 in FIG. 1). To manufacture.
In step 3, apply for the verification of the manufactured instrument to the verification agency, and if the verification is performed and passed in step 4,
The instrument is sealed with the certification seal and attached with the certification label. In step 5, the instrument manufacturer picks up the instruments that have passed the certification from the certification body and delivers them to the building automation company.

A building automation company installs a meter, and in step 6 sets the data of the "expiration date of the valid term" written on the meter's verification label for the meter to build it into the meter. This data is stored in the nonvolatile memory 9 to be stored.

In step 6, the building automation system is adjusted at the same time, and in step 7, the system is delivered to the tenant building owner.

FIG. 3 is a block diagram showing the configuration of an electronic watt hour meter management system for managing the expiration date of the verification valid period of the electronic watt hour meter shown in FIG.

In a tenant building or the like, the electronic watt hour meters 1a, 1b to 1n installed for each tenant are connected by a communication line 8 to a control device 10 installed in the management room of the owner of the tenant building. . The control device 10 is composed of a personal computer or the like, and is connected to the display 11 and the printer 12. In addition, communication line 8
Instead of, the communication means such as wireless, optical and power line carrier can be used.

FIG. 4 is a flow chart showing the process of writing / reading the data of the “expiration date of the valid period” of the control device 10 in the electronic watt-hour meter management system shown in FIG.

When the control device 10 writes the data of "expiration date of validity period" in step 1, the process proceeds to step 2, and the instrument tries to write the data of "expiration date of certification period". Is designated, and the data of "the expiration date of the valid period of the test" is transmitted to the electronic output meter (1 / 1a, 1b to 1n in FIG. 3).
When it is confirmed that the signal indicating the completion of the writing of the "expiration date of the certification" in the instrument specified in step 3 is received, it is determined in step 4 whether the reading date of the "expiration date of the certification validity period" is reached. If it is not the read date, the write processing operation of the system ends.

On the other hand, if the control device 10 performs the reading operation on the date of reading the data of "expiration date of validity of verification", it is not the writing operation of data of "expiration date of validity of verification" in step 1. Is confirmed and the process proceeds to step 4, and in step 4, it is confirmed that it is the “date of expiration of the valid period of the verification”, and the process proceeds to step 5. In step 5, the address of the instrument to be read first is specified, and in step 6, a command to read the data of "expiration date of the valid period" is sent to that instrument. On the other hand, the first instrument sends the data of "the expiration date of the valid period of the test" stored in its own non-volatile memory 9 (Fig. 1) to the control device 10. The control device 10 confirms in step 7 whether or not the data of "expiration date of validity of verification" has been normally received, and proceeds to step 8 when the data is normally received, and "expiration of validity period of the first instrument received" The “year / month” data is stored in its own memory (not shown).

Next, the control device 10 increments the address of the instrument from which the data of "expiration date of the test is expired" is incremented by one in step 9, and the reading operation of steps 6 to 8 is performed for the second instrument. To do. Further, in step 9, the control device 10 increments the address of the meter from which the data of “expiration date of validity of the test” is read by one, and performs the reading operation of steps 6 to 8 for the third meter.

In this way, the control device 10 reads the data of "the expiration date of the valid period of the verification" for all the measuring instruments 1a, 1b to 1n to be managed, and step 1
When it is confirmed that the reading of all the meters is completed at 0, it is determined at step 11 whether or not there is an instrument that has sent the data of "expiration date of the valid period of +6 months" from the current year. If there is such an instrument, in step 12, the instrument address, the customer name, and the expiration date of the valid period of the certification are output to the display 11 and the printer 12, and all reading operations are completed.

FIG. 5 is a flow chart showing the data writing / reading process of the “validation period expiration date” of the central processing unit 5 in the electronic watt hour meter shown in FIG.

When an instruction to write or read data of "expiration date of validity of test" is received from the controller 10 in step 1, it is judged in step 2 whether the data is to be written or read, and step 2 If it is determined to be a write command in step 3, the predetermined "validation term expiration date" data is written in the non-volatile memory 9 of the electronic watt-hour meter 1 in step 3. When the writing operation is completed, the meter (electronic watt hour meter 1) sends a completion signal to the control device 10 in step 4.

If it is judged in step 2 that the command is not a write command from the control device 10, and if it is judged in step 5 that it is a read command from the control device 10, it is stored in its own non-volatile memory 9 in step 6. The data of "the expiration date of the valid period of the test" is read out, and in step 7, the data is transmitted to the control device 10 through the communication line 8 or the like, and the reading operation is ended.

With the electronic watt-hour meter and the management system as described above, the owner of the tenant building reads the data of "the expiration date of the verification period" stored in the electronic watt-hour meter, It is possible to check the validity period of each instrument's certification periodically every month and print out the address (number) of the instrument whose remaining valid period is 6 months to 1 year as a hard copy. The data for 6 months to 1 year before the expiry of the period allows the replacement cost of the instrument to be recorded in the budget in advance, which makes it extremely easy and rational to manage the transaction proof instrument in the tenant building.

[0027]

As described above, according to the present invention as set forth in claim 1, a non-volatile memory for storing the data of the expiration date of the test valid period, and an input / output means for exchanging the data with the outside. And a writing / reading means for processing writing and reading of the data into the non-volatile memory, so that the electronic watt-hour meter itself can readably store the data of the expiration date of the verification valid period. Because I chose
It is possible to easily and automatically manage the expiration date of the certification valid period.

According to the present invention as set forth in claim 2, a plurality of electronic watt-hour meters according to claim 1 are connected to the control device via communication means, and the control device is provided with a plurality of electronic power meters. Sending and receiving the data of the expiration date of the valid test period to each of the meters along with the write command, and receiving the data of the expiry date of the valid test period from each of the multiple electronic watt-hour meters according to the transmission of the read command. Since the means and the processing means for processing the received data of the expiration date of the valid test period are provided, the expiration date of the valid test period can be easily and automatically managed by the control device.

[Brief description of drawings]

FIG. 1 is a block diagram of an electronic watt-hour meter, which is an embodiment of the present invention.

FIG. 2 is a flowchart showing a flow from ordering to installation of an electronic watt hour meter in the case of a single meter.

FIG. 3 is a block diagram showing a configuration of an electronic watt-hour meter management system that is an embodiment of the present invention.

[FIG. 4] Similarly, in the electronic watt hour management system,
6 is a flowchart showing a process of writing / reading data of “expiration date of validity period” of the control device 10.

FIG. 5 is a central processing unit 5 of the electronic watt hour meter.
5 is a flowchart showing a process of writing / reading data of “the expiration date of the valid period of test”.

FIG. 6 is a diagram showing a verification valid period according to the type of instrument.

[Explanation of symbols]

 1 electronic watt-hour meter 1a electronic watt-hour meter 1b electronic watt-hour meter 1n electronic watt-hour meter 2 voltage transformer 3 current transformer 4 power-frequency converter 5 central processing unit (writing / reading means) 6 display Part 7 Input / output part 8 Communication line 9 Non-volatile memory 10 Control device 11 Display 12 Printer

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[Procedure amendment]

[Submission date] August 18, 1994

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Front page continuation (72) Inventor Kazumasa Ibata 54 Suzukawa, Isehara City, Kanagawa Yamatake Hanuel Co., Ltd. Isehara Factory

Claims (2)

[Claims] 1. A power-frequency converter that obtains electric power from a product of a voltage and a current of a load, converts the electric power into a proportional frequency, and outputs the power, and integrates an output frequency of the power-frequency converter to obtain electric power. In an electronic watt-hour meter having a central processing unit for outputting as a quantity, a non-volatile memory for storing data of the expiration date of the certification valid period, an input / output unit for exchanging the data with the outside, and the data 2. An electronic watt-hour meter, comprising: a writing / reading unit that processes writing and reading in the nonvolatile memory. 2. A plurality of electronic watt-hour meters according to claim 1 are connected to a control device via a communication means, and the control device is connected to each of the plurality of electronic watt-hour meters, and the expiration date of the valid verification period is reached. Transmitting and receiving the data of the month together with the write command, and a transmitting and receiving means for receiving the data of the expiration date of the verification valid period from each of the plurality of electronic watt hour meters according to the transmission of the read command,
An electronic watt-hour meter management system, comprising: a processing means for processing the received data of the expiration date of the verification valid period.