CN206832864U - A kind of multichannel three-phase electric energy meter of distributed structure/architecture - Google Patents
A kind of multichannel three-phase electric energy meter of distributed structure/architecture Download PDFInfo
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- CN206832864U CN206832864U CN201621490460.8U CN201621490460U CN206832864U CN 206832864 U CN206832864 U CN 206832864U CN 201621490460 U CN201621490460 U CN 201621490460U CN 206832864 U CN206832864 U CN 206832864U
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Abstract
The utility model discloses a kind of multichannel three-phase electric energy meter of distributed structure/architecture, including measuring circuit, resistor network partial pressure sampling module, voltage signal conditioning and frequency detection circuit, MCU, power management module and external current synchronization sampling module, the measuring circuit connects resistor network partial pressure sampling module and power management module respectively, and the beneficial effects of the utility model are：One, communication bus design is done using CAN, is meeting the quick transmission of sampled signal meanwhile, it is capable to improve the anti-interference of data, it is ensured that the accuracy and success rate of sampled data transmission.Two, using external current synchronization sampling Design, the discrete sampling of voltage and current is realized, current transformer distribution can be expanded, in the application of multichannel three-phase electric energy meter, solve the restricted problem of distance between measurement circuitry.
Description
Technical field
It the utility model is related to a kind of electric energy meter, the multichannel three-phase electric energy meter of specifically a kind of distributed structure/architecture.
Background technology
In existing similar technique invention, by using the current sample process circuit of multichannel, coordinate three-phase voltage sampling
Circuit, special metering algorithm is combined via MCU, the detection metering of multichannel three phase electrical parameters signal is realized, so as to realize multichannel
The function of three-phase electric energy meter；Wherein current sample is to realize that the primary of three-phase current signal samples by external transformer, then
By the two stage treatment of the current regulating circuit in table, the measurement of current signal is realized.But in such invention, typically exist
In one table, current sample measurement and voltage sample measuring circuit are integrated with, while in the application of current transformer, due to mutual
The carrying load ability of sensor and the anti-interference for considering output signal, the output signal line of usual current transformer, line length are general
Control is within 5m, therefore this design just determines that the distance between signal of multichannel measurement can not be too far apart, no
Can then measurement performance be caused to decline.
In order to overcome the above-mentioned deficiencies of the prior art, the purpose of this utility model is to provide a kind of the more of distributed structure/architecture
Road three-phase electric energy meter, the electric energy meter voltage sampled measurements and current sample measurement independent design, can realize voltage and current
Discrete sampling, the interaction of voltage, current data is carried out by way of bus, realize the detection metering in electrical parameter.This electric energy
Table uses the MCU of Cortex-M3 kernels as task scheduling and the nucleus module of data processing, using CAN as data
Interaction bus, with reference to external current synchronization sampling module, realize the multichannel three-phase electric energy meter that distributed structure/architecture designs.This practicality
A kind of multichannel three-phase electric energy meter of new distributed architecture of offer, the remote stationing mode of independence of current sample module can be supported,
Base table is coordinated to realize the sampled measurements of three phase electrical parameters.The utility model solves multichannel three-phase electric energy meter in practical application
In, current transformer layout apart from limitation problem, so as to expand the application of product, improve the market competition of product
Power.
Utility model content
The purpose of this utility model is to provide a kind of multichannel three-phase electricity of distributed structure/architecture simple in construction, easy to use
Energy table, to solve the problems mentioned in the above background technology.
To achieve the above object, the utility model provides following technical scheme：
A kind of multichannel three-phase electric energy meter of distributed structure/architecture, including measuring circuit, resistor network partial pressure sampling module, voltage
Signal condition and frequency detection circuit, MCU, power management module and external current synchronization sampling module, the measuring circuit point
Not Lian Jie resistor network partial pressure sampling module and power management module, resistor network partial pressure sampling module be also connected with voltage signal tune
Reason and frequency detection circuit, voltage signal conditioning and frequency detection circuit are also connected with MCU, and power management module is also connected with MCU, institute
State MCU and external current synchronization sampling module is also connected by CAN and synchronous sampling signal processing module.
As preferred scheme of the present utility model：The external current synchronization sampling module has multiple, multiple external electric currents
Synchronized sampling module is sequentially connected in series, and each external current synchronization sampling module is respectively connected with independent three-phase current mutual inductance
Device.
As preferred scheme of the present utility model：The MCU is Cortex-M3 kernels.
Compared with prior art, the beneficial effects of the utility model are：One, communication bus design is done using CAN,
Meet the quick transmission of sampled signal meanwhile, it is capable to improve the anti-interference of data, it is ensured that sampled data transmission accuracy and
Success rate.Two, using external current synchronization sampling Design, the discrete sampling of voltage and current is realized, Current Mutual Inductance can be expanded
Device distribution, in the application of multichannel three-phase electric energy meter, solves the restricted problem of distance between measurement circuitry.
Brief description of the drawings
Fig. 1 is system block diagram of the present utility model；
Fig. 2 is the circuit diagram of current synchronization sample circuit.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
Fig. 1-2 is referred to, a kind of multichannel three-phase electric energy meter of distributed structure/architecture, mould is sampled by base table and external current synchronization
Block forms.Nucleus module of the base table as the electric energy meter, it is responsible for task run management and the three-phase voltage signal of system
Sampling processing, external current synchronization sampling module are responsible for sampling and the data transmission and processing of three-phase current signal.Wherein base table by
MCU main control modules, voltage signal conditioning module, power management module, CAN communication module and current synchronization sampling module etc.
Composition, wherein voltage signal conditioning module are mainly responsible for the processing of three-phase voltage sampled signal, there is provided are realized to MCU main control modules
The survey calculation of voltage signal；Switching power circuit combination power management chip module forms power management module, for whole system
System provides required power supply；CAN communication module samples advanced CAN design, is responsible for current sample module and MCU master
Control the data interaction of module；Peripheral signal processing circuit composition current synchronization sampling module is coordinated using multichannel ADC chips, born
Blame the sampling processing of three-phase current signal；MCU main control modules use time-sharing multiplex algorithm, carry out the system of current synchronization sampling module
One management and running, coordinate voltage sampling signal, realize the sampling metering of multichannel three phase electrical parameters.
Utility model coordinates resistance pressure-dividing network, realizes three-phase voltage signal by built-in voltage signal conditioning circuit
Sampled measurements；By using same phase comparator circuit, the zero passage detection to voltage signal is realized, is converted into square-wave signal, is carried
MCU is supplied as frequency sampling；By the way of current transformer access, it is same that threephase current transformer is connected to external electric current
Sampling module is walked, sampling module carries out current sample control according to the data of synchronous signal line；, will be external by CAN
Current synchronization sampling module carries out communication with base table and is connected, and realizes that current sampling data is transmitted to the MCU module of base table, MCU moulds
Block using internal algorithm realize electric power signal analysis calculate so as to obtain voltage, electric current, power, frequency, harmonic wave amount and
The measurement parameters such as electric energy.The wherein CAN interface of current synchronization sampling module is using can cascade system, it would be preferable to support multiple to adopt
The interconnection of egf block, so as to realize the sampling processing of multichannel three-phase current, meet the metering requirements of multichannel three phase electrical parameters.
Claims (3)
1. a kind of multichannel three-phase electric energy meter of distributed structure/architecture, including measuring circuit, resistor network partial pressure sampling module, voltage letter
Number conditioning and frequency detection circuit, MCU, power management module and external current synchronization sampling module, it is characterised in that：The survey
Amount circuit connects resistor network partial pressure sampling module and power management module respectively, and resistor network partial pressure sampling module is also connected with electricity
Signal condition and frequency detection circuit are pressed, voltage signal conditioning and frequency detection circuit are also connected with MCU, and power management module also connects
MCU is met, the MCU also connects external current synchronization sampling module by CAN and synchronous sampling signal processing module.
A kind of 2. multichannel three-phase electric energy meter of distributed structure/architecture according to claim 1, it is characterised in that the external electricity
Stream synchronized sampling module has multiple, and multiple external current synchronization sampling modules are sequentially connected in series, and each external current synchronization is adopted
Egf block is respectively connected with independent threephase current transformer.
3. the multichannel three-phase electric energy meter of a kind of distributed structure/architecture according to claim 1, it is characterised in that the MCU is
Cortex-M3 kernels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621490460.8U CN206832864U (en) | 2016-12-30 | 2016-12-30 | A kind of multichannel three-phase electric energy meter of distributed structure/architecture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621490460.8U CN206832864U (en) | 2016-12-30 | 2016-12-30 | A kind of multichannel three-phase electric energy meter of distributed structure/architecture |
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| Publication Number | Publication Date |
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| CN206832864U true CN206832864U (en) | 2018-01-02 |
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| CN201621490460.8U Active CN206832864U (en) | 2016-12-30 | 2016-12-30 | A kind of multichannel three-phase electric energy meter of distributed structure/architecture |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112858781A (en) * | 2020-12-31 | 2021-05-28 | 华立科技股份有限公司 | Harmonic detection system |
-
2016
- 2016-12-30 CN CN201621490460.8U patent/CN206832864U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112858781A (en) * | 2020-12-31 | 2021-05-28 | 华立科技股份有限公司 | Harmonic detection system |
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| CP03 | Change of name, title or address |
Address after: 314000 building 4, 1369 South Chengdu Road, Jiaxing, Jiaxing, Zhejiang 201 Patentee after: Zhejiang Donghong Electronic Technology Co. Ltd. Address before: 314000 2, 4 building, 1369 South Chengdu Road, Jiaxing, Jiaxing, Zhejiang. Patentee before: Jiaxing Dong Hong Electronic Science and Technology Co., Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 314000 building 4, 1369 South Chengdu Road, Jiaxing, Jiaxing, Zhejiang 201 Patentee after: Zhejiang Donghong Electronics Co.,Ltd. Address before: 314000 building 4, 1369 South Chengdu Road, Jiaxing, Jiaxing, Zhejiang 201 Patentee before: ZHEJIANG EASTRON ELECTRONIC Co.,Ltd. |