CN201522536U - Full decompression module for three-phase electronic electric energy meter - Google Patents
Full decompression module for three-phase electronic electric energy meter Download PDFInfo
- Publication number
- CN201522536U CN201522536U CN200920259222XU CN200920259222U CN201522536U CN 201522536 U CN201522536 U CN 201522536U CN 200920259222X U CN200920259222X U CN 200920259222XU CN 200920259222 U CN200920259222 U CN 200920259222U CN 201522536 U CN201522536 U CN 201522536U
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- circuit
- full decompression
- power
- energy meter
- current sampling
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Abstract
The utility model provides a full decompression module for a three-phase electronic electric energy meter, which comprises an electricity disconnecting or connecting checking circuit, a current sampling circuit, a low power consumption microcontroller MCU, a data storage unit, a battery for providing power supply, a power supply conversion circuit, wherein the current sampling circuit is mainly composed of a current conversion circuit and a signal adjusting circuit, and the MCU samples and analyzes voltage signals which are adjusted through the current sampling circuit to judge whether to enter full decompression and to enter data storage treatment or not. The full decompression module can be conveniently implanted on electric energy meters of different factories, and only a plurality of interfaces need leaving on a main meter for realizing full decompression recording function.
Description
Technical field
The utility model relates to the full decompression processing of circuit of a kind of electrical network module, relates in particular to a kind of full decompression module based on three-phase electric energy meter.
Background technology
Electric weight in the electrical network when each phase decompression record case and decompression is in order reasonably to remedy electric weight.Full decompression is the critical voltage that three-phase voltage (single-phase table is a single-phase voltage) all is lower than electric energy meter, and load current is greater than the operating mode of 5% specified (substantially) electric current.Electronic electric energy meter has lost power supply and can not write down full decompression data under full decompression state.The most of decompression registering instrument that adopts of management of power use department comes the recording pressure loss time of origin at present.As a kind of utility appliance of accurate metering, the decompression registering instrument has prevented PT loop disconnection fault intentionally/unintentionally effectively, and makes its loss that causes minimum as far as possible.But described timer can only writing time, can not write down the current value of this moment, so that can not reasonably remedy electric weight.The decompression registering instrument not only takies the metering cabinet space as an independent equipment in addition, increases metering and loads with mutual inductor, and increased operation maintenance work.
The utility model content
The purpose of this utility model is to design electrical network and is under the full decompression operating mode, accurately this operating mode generation of metering and the time that finishes and current value at this moment, ampere-hour value when writing down the full decompression that these several basic values calculate is so that judge the measurement testing circuit module of full decompression operating mode accurately.
This full decompression module that is used for three phases electronic energy meter that the utility model provides, comprise power down or go up power detection circuit, current sampling circuit, low-power consumption microcontroller MCU, data storage cell, be used to provide the battery and the power-switching circuit of power supply, described current sampling circuit mainly is made up of current converter circuit, signal conditioning circuit, described MCU judges whether to enter full decompression and enters data storage processing sampling, analyze through the voltage signal after the current sampling circuit conditioning.
Described battery adopts ammeter low-power consumption 6V battery, and power-switching circuit converts battery 6V to 3.3V.Described power-switching circuit mainly is made up of low-power consumption DC voltage-stabilizing chip S812C33.Described data storage cell mainly is made up of the 24C04 storage chip, this storage chip as with the interface of three phases electronic energy meter.
When electric energy meter (hereinafter to be referred as master meter) operate as normal, the utility model quits work; When master meter can not be worked because of power down, the utility model was started working automatically.The utility model can write down zero-time, concluding time and the current value that full decompression takes place, and department provides foundation for the management of power use, so that analyze whether stealing and in time remedy electric weight.The utility model can be implanted on the electric energy meter of different manufacturers easily, and master meter only need be reserved several interfaces, just can realize full decompression writing function.
The utility model compared with prior art has the following advantages:
(1) interface of the present utility model is simple, only needs the master meter of electric energy meter to have several interface (see figure 2)s just passable, and is portable good, therefore can extensively transplant on the electric energy meter of different manufacturers, has great promotional value.
(2) because the low-power consumption microcontroller that adopted of the present utility model, in interrupt service routine, finish entirely in work main aspect the software (signal sampling, data processing and preservation etc.) simultaneously, after full decompression finishes, MCU is in super low-power consumption, greatly reduce circuit power consumption, prolonged battery serviceable life.
(3) modular structure is simple, and cost is low, has great price advantage, is beneficial to popularization.
Description of drawings
Fig. 1 is a block diagram of the present utility model.
Fig. 2 is a circuit diagram of the present utility model.
Fig. 3 is the utility model current sample Interrupt Process process flow diagram.
Embodiment
The utlity model has battery and power-switching circuit, the power down/detection module that powers on, current sample module, MCU, data storage cell as can be seen from Figure 1.
Current sampling circuit of the present utility model as can be seen from Figure 2 is mainly by current converter circuit, signal conditioning circuit is formed, resistance R 21-resistance R 26, the signal amplification circuit of partly forming with the A of amplifier LPV324 carries out difference to the A road current signal of input and amplifies, the signal amplification circuit of partly being made up of the B of resistance R 15-resistance R 20 and amplifier carries out difference to the B road current signal of input and amplifies, by resistance R 9---the signal amplification circuit that the C of resistance R 14 and amplifier partly forms carries out the difference amplification to the C road current signal of importing, by R7, R8, C5, C6, C7, the D of C8 and amplifier partly forms the benchmark of signal, and these four parts are formed the current sampling circuit module.This 3 road signal enters MCU, finishes sampling, the calculating of current signal by MCU, and full decompression judgment processing.
Form power-fail detection circuit by diode and R27, when adding, MCU do not measure main frame when being power-down state, MCU can enter under the low power consumpting state, after detecting power-off signal, MCU enters duty, begins to gather electric current, reads parameter and relevant information in the 24C04 chip (data storage cell mainly is made up of this chip), judge that whether system is full decompression state, carries out relevant treatment then.When if MCU detects main frame and is power-up state then, parameter and relevant information that MCU can preserve in the 24C04 reenter under the low power consumpting state.
By R1, R2, R3, R4, D3, D4, the E that Q1 forms
2The PROM circuit is finished storage of main frame and MCU of the present utility model and host information and exchange.When being the MCU process information, by MCU control iic bus, when main frame and the utility model carry out exchanges data, by the host computer control iic bus.
Power-switching circuit mainly is made up of C1, C2, C3 and low-power consumption voltage stabilizing chip as can be seen from Figure 2, the direct supply of 6V is converted into MCU and the needed power supply of other modular circuits, and give storage chip and sample circuit power supply, this circuit is realized by low-power consumption voltage stabilizing chip S-812C33.
Power-switching circuit also can be substituted by some equivalent electrical circuit except the foregoing description design.
On software design, reduce in order to make Overall Power Consumption, (see figure 3) is finished in main work (signal sampling, data processing and preservation etc.) entirely in interrupt service routine.Establishment interrupt service routine branch utilizes the I/O of MCU to have the characteristic of external interrupt, adopts interrupt mode during making software, and does not adopt inquiry mode, in addition, when regularly interrupting, only MCU is waken up, and all the other modules still are in off state.In a period of time, when not detecting full decompression, MCU reenters low-power consumption mode.Power supply is controlled to module (chip), promptly connects the power supply of the corresponding function module according to need of work, in the time will carrying out data storage, just gives E
2The power supply of appropriate section is turn-offed in the PROM power supply immediately when finishing storage; In the time that current sample will be carried out,, turn-off the power supply of appropriate section when finishing current sample immediately to the operational amplifier power supply.
Claims (4)
1. full decompression module that is used for three phases electronic energy meter, it is characterized in that comprising power down or go up power detection circuit, current sampling circuit, low-power consumption microcontroller MCU, data storage cell, be used to provide the battery and the power-switching circuit of power supply, described current sampling circuit mainly is made up of current converter circuit, signal conditioning circuit, described MCU judges whether to enter full decompression and enters data storage processing sampling, analyze through the voltage signal after the current sampling circuit conditioning.
2. the full decompression module that is used for three phases electronic energy meter according to claim 1 is characterized in that battery adopts ammeter low-power consumption 6V battery, and power-switching circuit converts battery 6V to 3.3V.
3. the full decompression module that is used for three phases electronic energy meter according to claim 1 is characterized in that power-switching circuit mainly is made up of low-power consumption DC voltage-stabilizing chip S812C33.
4. according to claim 1 or the 3 described full decompression modules that are used for three phases electronic energy meter, it is characterized in that described data storage cell mainly is made up of the 24C04 storage chip, this storage chip as with the interface of three phases electronic energy meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920259222XU CN201522536U (en) | 2009-11-13 | 2009-11-13 | Full decompression module for three-phase electronic electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920259222XU CN201522536U (en) | 2009-11-13 | 2009-11-13 | Full decompression module for three-phase electronic electric energy meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201522536U true CN201522536U (en) | 2010-07-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920259222XU Expired - Lifetime CN201522536U (en) | 2009-11-13 | 2009-11-13 | Full decompression module for three-phase electronic electric energy meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201522536U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103884903A (en) * | 2014-02-28 | 2014-06-25 | 惠州中城电子科技有限公司 | Three-phase electronic type multi-functional total voltage loss detection system |
| CN103983836A (en) * | 2014-04-29 | 2014-08-13 | 宁波三星电气股份有限公司 | Electric energy meter full voltage loss detection method |
| CN106569029A (en) * | 2016-11-25 | 2017-04-19 | 华立科技股份有限公司 | Single-phase intelligent electric meter |
| CN114184877A (en) * | 2020-09-14 | 2022-03-15 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Electric energy meter and full voltage loss detection method thereof |
-
2009
- 2009-11-13 CN CN200920259222XU patent/CN201522536U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103884903A (en) * | 2014-02-28 | 2014-06-25 | 惠州中城电子科技有限公司 | Three-phase electronic type multi-functional total voltage loss detection system |
| CN103983836A (en) * | 2014-04-29 | 2014-08-13 | 宁波三星电气股份有限公司 | Electric energy meter full voltage loss detection method |
| CN106569029A (en) * | 2016-11-25 | 2017-04-19 | 华立科技股份有限公司 | Single-phase intelligent electric meter |
| CN114184877A (en) * | 2020-09-14 | 2022-03-15 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Electric energy meter and full voltage loss detection method thereof |
| CN114184877B (en) * | 2020-09-14 | 2024-03-19 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Electric energy meter and full-voltage-loss detection method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100707 |