CN105785117A - Metering circuit - Google Patents

Metering circuit Download PDF

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Publication number
CN105785117A
CN105785117A CN201610214725.XA CN201610214725A CN105785117A CN 105785117 A CN105785117 A CN 105785117A CN 201610214725 A CN201610214725 A CN 201610214725A CN 105785117 A CN105785117 A CN 105785117A
Authority
CN
China
Prior art keywords
chip
signal
metering
circuit
sampling circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
CN201610214725.XA
Other languages
Chinese (zh)
Inventor
陈佩琼
龚明波
张军照
张金锁
王海珍
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZHENGZHOU WONDER ELECTRICAL POWER CO Ltd
Training Center of State Grid Zhejiang Electric Power Co Ltd
Original Assignee
ZHENGZHOU WONDER ELECTRICAL POWER CO Ltd
Training Center of State Grid Zhejiang Electric Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ZHENGZHOU WONDER ELECTRICAL POWER CO Ltd, Training Center of State Grid Zhejiang Electric Power Co Ltd filed Critical ZHENGZHOU WONDER ELECTRICAL POWER CO Ltd
Priority to CN201610214725.XA priority Critical patent/CN105785117A/en
Publication of CN105785117A publication Critical patent/CN105785117A/en
Withdrawn legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R22/00Arrangements for measuring time integral of electric power or current, e.g. electricity meters
    • G01R22/06Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R22/00Arrangements for measuring time integral of electric power or current, e.g. electricity meters
    • G01R22/06Arrangements for measuring time integral of electric power or current, e.g. electricity meters by electronic methods
    • G01R22/061Details of electronic electricity meters
    • G01R22/066Arrangements for avoiding or indicating fraudulent use

Abstract

Disclosed in the invention is a metering circuit. The metering circuit comprises a metering module connected with a power-frequency power supply. The metering module consists of a metering chip, a current sampling circuit, a voltage sampling circuit, and a pulse generating circuit; and the current sampling circuit and the voltage sampling circuit are connected with the power-frequency power supply and the metering chip. The current sampling circuit collects a voltage signal of the power-frequency power supply and sends the voltage signal to the metering chip; the voltage sampling circuit collects a current signal of the power-frequency power supply and sends the current signal to the metering chip; the metering chip connected with the pulse generating circuit receives the voltage signal and the current signal and converts the signals into pulses, and the converted pulses are sent externally by the pulse generating circuit. The current signal and the voltage signal of the power-frequency power supply are monitored and are converted into the pulses directly by the metering module; the pulses are sent to a microcontroller externally; and the microcontroller completes the follow-up metering work. Therefore, the circuit structure becomes simple and the functions are perfected.

Description

Metering circuit
[technical field]
The present invention relates to electric energy meter field, particularly relate to the metering circuit of a kind of simulation electric energy meter.
[background technology]
Construction along with intelligent grid, single, three-phase intelligent artificial intelligence electric energy meter is widely used in electric-power metering, but in use have also discovered problems, the on-the-spot bug list directly replacing table meter found also is responsible for process by intelligent electric energy meter producer, because on-the-spot dress table connects electrician and the restriction of operation maintenance Personnel Skill Levels, the fault of intelligent electric energy meter cannot be done completely, the Trouble Report of system, all kinds of faults that therefore intelligence intelligent electric energy meter cannot be occurred by power system personnel and man of Watch Factory technical staff carry out deep research.Therefore to improve dress table to meet electrician and operation maintenance Personnel Skill Levels, understand and be familiar with operation principle single, three-phase intelligent intelligent electric energy meter, correct accident analysis and presentment system, complete Trouble Report can be done when site intelligent table breaks down, power system personnel and man of Watch Factory technical staff carry out deep research by all kinds of problems that intelligent electric energy meter can be occurred by Trouble Report, also provide substantial amounts of practical basis for Ge Wang provincial electric power company and intelligent electric energy meter manufacturing enterprise in intelligent electric energy meter 6 application extension, technical research etc. simultaneously.WT-F56 intelligent simulation intelligent electric energy meter fault simulation actual training device, some typical faults in using in conjunction with the on-the-spot existing typical electrical network operation event of electricity consumption and intelligent electric energy meter carry out analog demenstration and analysis on device, make Field Force understand, be familiar with on-the-spot fault, by training, learning, understand and be also familiar with operation principle single, three-phase intelligent intelligent electric energy meter.
The metering module of existing simulation electric energy meter, it is impossible to provide the function of measuring under stealing state, student cannot pass through the study of simulation stage to grasp the ability finding user's stealing.
[summary of the invention]
Problem to be solved by this invention provides a kind of metering circuit possessing detection stealing status function.
For reaching object defined above, the present invention adopts following scheme: a kind of metering circuit, including the metering module being connected with power frequency supply, it is characterised in that: metering module comprises computation chip, current sampling circuit, voltage sample loop, pulse generation loop;Current sampling circuit and voltage sampling circuit are connected with power frequency supply and computation chip, described current sampling circuit gathers the voltage signal of power frequency supply and is sent to described computation chip, and described voltage sampling circuit gathers the current signal of power frequency supply and is sent to described computation chip;Described computation chip is connected with pulse generation loop, and receive described voltage signal and described current signal be converted into pulse after be sent out through described pulse generation loop, described pulse circuit includes the amplification module receiving described pulse and amplifying, and also includes the rectification module being connected and amplification afterpulse is carried out rectification with described amplification module.
First preferred version of the present invention is: described pulse is square-wave pulse.
Second preferred version of the present invention is: described computation chip includes and current sampling circuit, voltage sample loop, loop-coupled first chip of pulse generation and the second chip of being connected with described first chip.
3rd preferred version of the present invention is:
One, the voltage signal of the first chip controls voltage sample loop and current sampling circuit Real-time Collection power frequency supply and current signal;
Two, when voltage signal is lower than nominal voltage signal, first chip starts the second chip operation and voltage signal and current signal is passed to the second chip in real time, second chip starts and records the startup time is the very first time, and generates voltage signal, current signal, the Data-Link of time point every 10 minutes and store;
Three, when voltage signal is higher than nominal voltage signal, the first chip sends reading signal to the second chip;Second chip receives this reading signal and was recorded as the second time, then sends the very first time, the second time, at least one Data-Link to the first chip.
The present invention can reach following technique effect:
1. it is sent out to microcontroller by the current signal of power frequency supply and voltage signal are monitored and are converted into by metering module pulse, completes ensuing gage work by microcontroller so that this circuit structure is simple and perfect in shape and function.
2. the setting of amplification module and rectification module, it is ensured that pulse will not cause bigger noise because of the interference of other circuit so that microprocessor cannot read.
3. by independent stealing state is measured of the second chip, it is ensured that the accuracy of stealing status metric and reliability.
These features of the present invention and advantage will be detailed in detailed description below, accompanying drawing exposure.
[accompanying drawing explanation]
Below in conjunction with accompanying drawing, the present invention is described further:
Fig. 1 is the module diagram of the artificial intelligence ammeter of the embodiment of the present invention 1.
Fig. 2 is the module map of the electric energy meter mainboard of the embodiment of the present invention 1.
Fig. 3 is the theory diagram of the metering module of the embodiment of the present invention 1.
[detailed description of the invention]
The technical scheme of the embodiment of the present invention is explained and illustrated by the accompanying drawing below in conjunction with the embodiment of the present invention, but following embodiment is only the preferred embodiments of the present invention, and not all.Based on the embodiment in embodiment, those skilled in the art are obtained other embodiments under the premise not making creative work, broadly fall into protection scope of the present invention.
Embodiment 1.
Metering circuit is located in artificial intelligence electric energy meter, in order to express easily, then first the structure and working principle of artificial intelligence electric energy meter is described, and Details as Follows.
Referring to Fig. 1, a kind of artificial intelligence electric energy meter, including electric energy meter mainboard and the simulated failure panel being connected with electric energy meter mainboard and communication conversion and control case, communication conversion and control case realizes communicating by RS485 with electric energy meter mainboard, make the data of communication conversion and control case reading power meters mainboard, communication conversion and control case realizes communicating by RS485 with simulated failure panel, makes communication conversion and control case control simulated failure panel and controls with the simulation realizing fault.
Its workflow is: the communication conversion and control case energy information data by RS485 reading power meters mainboard, when needs set simulated failure, communication conversion and control case sends commands to simulated failure panel by RS485, make simulated failure panel that electric energy meter mainboard is performed simulated failure to control, thus realizing the simulated failure to perform.
Referring to Fig. 2, electric energy meter mainboard includes microprocessor, metering circuit, communication module, display module, take control module, clock module, multi-functional output module and power module, wherein, microprocessor is communicated with communication conversion and control case by communication module, microprocessor through bus shows the display function of electric energy meter with display module communication, microprocessor and metering circuit complete the function of measuring of electric energy meter by serial bus communication, microprocessor through bus controls to take control module and realizes expense control function, microprocessor and clock module obtain clock information by serial bus communication, microprocessor and the multi-functional output module of clock module co-controlling realize multifunctional pulse output, power module provides power supply for electric energy meter mainboard.
Simulated failure panel comprises main control unit, communication unit, relay control unit, relay matrix unit.When to realize simulated failure function, communication conversion and control case sends commands to simulated failure panel by RS485, order can be then transferred to main control unit by communication unit, after main control unit analyzing and processing order, by controlling relay control unit, thus relay matrix unit is performed operation, thus realizing simulated failure function.Concrete simulated failure implementation is: on electric energy meter, the power supply circuits of each module and signal circuit are provided with multiple switch.Relay control unit can control aforesaid plurality of switching on-off, needs simulate certain module break down time, the power supply circuits of drop corresponding module or signal output apparatus.
With reference to Fig. 3, the metering circuit in electric energy meter mainboard comprises metering module, and metering module comprises computation chip, current sampling circuit, voltage sample loop, pulse generation loop;Current sampling circuit and voltage sampling circuit are connected with power frequency supply and computation chip, described current sampling circuit gathers the voltage signal of power frequency supply and is sent to described computation chip, and described voltage sampling circuit gathers the current signal of power frequency supply and is sent to described computation chip;Described computation chip is connected with pulse generation loop, and receive described voltage signal and described current signal be converted into square-wave pulse after be sent out through described pulse generation loop;Microprocessor comprises single-chip microcomputer, and single-chip microcomputer receives described square-wave pulse the energy information data process preservation being converted into;The energy information that single-chip microcomputer will show is sent to display module by bus, thus realizing the information display function of electric energy meter.Described pulse circuit includes the amplification module receiving described pulse and amplifying, and also includes the rectification module being connected and amplification afterpulse is carried out rectification with described amplification module.
When communication conversion and control case by RS485 electric energy meter mainboard carried out information mutual time, then data arrive single-chip microcomputer by communication unit, after single-chip microcomputer processes the information received and analyzes and processes, through RS485 communication unit by information back to communication conversion and control case;When single-chip microcomputer receives the control cx order that communication conversion and control case sends, after single-chip microcomputer judges that control command is legal, single-chip microcomputer can control expense control unit and realize expense control function;By single-chip microcomputer by universal serial bus and clock module communication, thus obtaining clock information;Power module realizes being converted into alternating current the function of DC source needed for electric energy meter.
Aforementioned computation chip includes and current sampling circuit, voltage sample loop, loop-coupled first chip of pulse generation and the second chip of being connected with described first chip, wherein the first chip is for the gage work in course of normal operation, second chip is for the gage work under stealing state, and specific works flow process is as follows:
One, the voltage signal of the first chip controls voltage sample loop and current sampling circuit Real-time Collection power frequency supply and current signal;
Two, when voltage signal is lower than nominal voltage signal, first chip starts the second chip operation and voltage signal and current signal is passed to the second chip in real time, second chip starts and records the startup time is the very first time, and generates voltage signal, current signal, the Data-Link of time point every 10 minutes and store;
Three, when voltage signal is higher than nominal voltage signal, the first chip sends reading signal to the second chip;Second chip receives this reading signal and was recorded as the second time, then sends the very first time, the second time, at least one Data-Link to the first chip;
Four, the first chip is sent to microprocessor after obtaining the aforementioned very first time, the second time, at least one Data-Link;
Five, microprocessor receives the aforementioned very first time, the second time, at least one Data-Link and stores, and controls the display module display very first time, the second time;
Six, aforementioned microprocessor is connected with external server by communication conversion and control case, and transmits the described very first time, the second time, at least one Data-Link and ammeter and number to external server storage.
The above, be only the specific embodiment of the present invention, but protection scope of the present invention be not limited thereto, and is familiar with this those skilled in the art and should be understood that the present invention includes but not limited to accompanying drawing and content described in detailed description of the invention above.The function of any present invention of not necessarily departing from and the amendment of structural principle are intended to be included in the scope of claims.

Claims (4)

1. a metering circuit, including the metering module being connected with power frequency supply, it is characterised in that: metering module comprises computation chip, current sampling circuit, voltage sample loop, pulse generation loop;Current sampling circuit and voltage sampling circuit are connected with power frequency supply and computation chip, described current sampling circuit gathers the voltage signal of power frequency supply and is sent to described computation chip, and described voltage sampling circuit gathers the current signal of power frequency supply and is sent to described computation chip;Described computation chip is connected with pulse generation loop, and receive described voltage signal and described current signal be converted into pulse after be sent out through described pulse generation loop, described pulse circuit includes the amplification module receiving described pulse and amplifying, and also includes the rectification module being connected and amplification afterpulse is carried out rectification with described amplification module.
2. metering circuit according to claim 1, it is characterised in that: described pulse is square-wave pulse.
3. metering circuit according to claim 1, it is characterised in that: described computation chip includes and current sampling circuit, voltage sample loop, loop-coupled first chip of pulse generation and the second chip of being connected with described first chip.
4. metering circuit according to claim 3, it is characterised in that:
One, the voltage signal of the first chip controls voltage sample loop and current sampling circuit Real-time Collection power frequency supply and current signal;
Two, when voltage signal is lower than nominal voltage signal, first chip starts the second chip operation and voltage signal and current signal is passed to the second chip in real time, second chip starts and records the startup time is the very first time, and generates voltage signal, current signal, the Data-Link of time point every 10 minutes and store;
Three, when voltage signal is higher than nominal voltage signal, the first chip sends reading signal to the second chip;Second chip receives this reading signal and was recorded as the second time, then sends the very first time, the second time, at least one Data-Link to the first chip.
CN201610214725.XA 2016-04-08 2016-04-08 Metering circuit Withdrawn CN105785117A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610214725.XA CN105785117A (en) 2016-04-08 2016-04-08 Metering circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610214725.XA CN105785117A (en) 2016-04-08 2016-04-08 Metering circuit

Publications (1)

Publication Number Publication Date
CN105785117A true CN105785117A (en) 2016-07-20

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

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CN (1) CN105785117A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106154002A (en) * 2016-08-11 2016-11-23 国网浙江平湖市供电公司 It is provided with the electric energy meter mainboard of metering circuit
CN106324339A (en) * 2016-08-11 2017-01-11 国网浙江平湖市供电公司 Metering circuit
CN106324338A (en) * 2016-08-11 2017-01-11 国网浙江平湖市供电公司 Simulation smart watt-hour meter
CN106353592A (en) * 2016-08-11 2017-01-25 国网浙江平湖市供电公司 Test system based on simulated intelligent electric energy meter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106154002A (en) * 2016-08-11 2016-11-23 国网浙江平湖市供电公司 It is provided with the electric energy meter mainboard of metering circuit
CN106324339A (en) * 2016-08-11 2017-01-11 国网浙江平湖市供电公司 Metering circuit
CN106324338A (en) * 2016-08-11 2017-01-11 国网浙江平湖市供电公司 Simulation smart watt-hour meter
CN106353592A (en) * 2016-08-11 2017-01-25 国网浙江平湖市供电公司 Test system based on simulated intelligent electric energy meter

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Application publication date: 20160720