CN202305664U - Electric energy meter circuit - Google Patents

Electric energy meter circuit Download PDF

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Publication number
CN202305664U
CN202305664U CN2011204205623U CN201120420562U CN202305664U CN 202305664 U CN202305664 U CN 202305664U CN 2011204205623 U CN2011204205623 U CN 2011204205623U CN 201120420562 U CN201120420562 U CN 201120420562U CN 202305664 U CN202305664 U CN 202305664U
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CN
China
Prior art keywords
circuit
resistance
far infrared
terminals
communication module
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.)
Expired - Fee Related
Application number
CN2011204205623U
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Chinese (zh)
Inventor
孙经
张小龙
王勇
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.)
Anhui Nari Zenith Electricity & Electronic Co Ltd
Nari Technology Co Ltd
State Grid Electric Power Research Institute
Original Assignee
Anhui Nari Zenith Electricity & Electronic Co Ltd
Nari Technology Co Ltd
State Grid Electric Power Research Institute
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 Anhui Nari Zenith Electricity & Electronic Co Ltd, Nari Technology Co Ltd, State Grid Electric Power Research Institute filed Critical Anhui Nari Zenith Electricity & Electronic Co Ltd
Priority to CN2011204205623U priority Critical patent/CN202305664U/en
Application granted granted Critical
Publication of CN202305664U publication Critical patent/CN202305664U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses an electric energy meter circuit which comprises a master control circuit, a display circuit, a communication circuit, a storage circuit and a metering circuit, wherein the display circuit, the communication circuit, the storage circuit and the metering circuit are respectively connected with the master control circuit; the communication circuit comprises an infrared communication circuit and a 485 communication circuit; and the metering circuit comprises a current sampling circuit and a voltage sampling circuit. An SOC (System on Chip) is adopted in the electric energy meter circuit; metering and liquid crystal driving are integrated into one chip; the combination of the single chip, metering chip and liquid crystal driving of the traditional electric energy meter is replaced; the EMC (Electro Magnetic Compatibility) performance is better; the hardware resource is saved; the area of a PCB (Printed Circuit Board) is efficiently reduced; and the cost is lowered.

Description

The electric energy meter circuit
Technical field
The utility model relates to a kind of electric energy meter circuit.
Background technology
Electric energy meter is the instrument that is used for measuring electric energy, claims watt-hour meter again.The power consumption of every household need be checked meter from house to house through manual work mostly and realized, relatively waste time and energy, and the degree of accuracy of manual metering is unreliable; Caused the error on the statistics expense; As time goes on, can bring very big error, cause certain loss to the user.
Along with the continuous progress of society, ammeter also develops in the direction towards total digitalization, and of that month or ammeter reading then can directly be reflected on the display screen of ammeter, need not to check meter from house to house.
Traditional electric energy meter is to be combined by single-chip microcomputer, computation chip and liquid crystal drive, and the circuit structure more complicated has brought certain degree of difficulty for the making of PCB, and the hardware that uses simultaneously is many, has caused the bigger wasting of resources.
The utility model content
The purpose of the utility model provides a kind of electric energy meter circuit, adopts single-chip (SOC), will measure, liquid crystal drive is integrated in the chip piece, and the single-chip microcomputer, computation chip and the liquid crystal drive that replace traditional electric energy meter make up.
The technical scheme of the utility model is following:
A kind of electric energy meter circuit; Include governor circuit, display circuit, telecommunication circuit, memory circuit, metering circuit and power circuit; It is characterized in that: described display circuit, telecommunication circuit, memory circuit and metering circuit link to each other with governor circuit respectively; Described display circuit comprises LCDs LCD, and described LCDs LCD has 16 pins, and is connected with pull down resistor R6 ~ R21 respectively through lead;
Described telecommunication circuit comprises infrared communication circuit and 485 telecommunication circuits; Described infrared communication circuit comprises far infrared transmitter L4 and far infrared receiver L3; The anode series resistance R 26 back external direct current power supplies of described far infrared transmitter L4, the negative electrode of far infrared transmitter L4 is connected with triode Q1, the Q2 of common emitter, and wherein the collector of triode Q1 links to each other with the negative electrode of far infrared transmitter L4; The base stage of triode Q1 links to each other with the collector of triode Q2; The collector of triode Q2 inserts direct supply through resistance R 5, draws signal input part IRTXD behind the base stage outer meeting resistance R27 of triode Q2, and the two ends of resistance R 27 are parallel with capacitor C Z1; Draw signal output part IRRXD from the 1st terminals of said far infrared receiver L3; The 2nd, 3 terminals of far infrared receiver L3 are respectively through lead ground connection and external direct current power supply; Be connected with resistance R 22 between the 1st, 3 terminals of far infrared receiver L3, be connected with capacitor C 11 between the 2nd, 3 terminals of far infrared receiver L3; Described 485 telecommunication circuits comprise duplex communication module U3; The RO end of said duplex communication module U3 is through resistance R 35 external optocoupler OC1; The DE of duplex communication module U3 ,/RE end is through the parallel with one another and external optocoupler OC2 of lead; The DI end of duplex communication module U3 is through resistance R 50 ground connection; The A end of duplex communication module U3 is through the 1st pin of thermistor PCT1 access connector JP2, and the B end of duplex communication module U3 is parallel with Transient Suppression Diode T1 through the 2nd pin that thermistor PCT2 inserts connector JP2 between the A of duplex communication module U3, the B end; The end of said Transient Suppression Diode T1 inserts direct supply through resistance R 37, and the other end of Transient Suppression Diode T1 is through resistance R 38 ground connection;
Described memory circuit comprises single-chip microcomputer U2, and the SCL of said single-chip microcomputer U2, SDA end are respectively through resistance R 29, R28 external direct current power supply, and the A0 of single-chip microcomputer U2, A1, NC, WP end be ground connection altogether;
Described governor circuit comprises CPU and peripheral circuit thereof; Described metering circuit comprises current sampling circuit and voltage sampling circuit; Described current sampling circuit comprises the current acquisition module CT1 and the shunt shunt of mutual electrical connection; Two output terminals of said shunt shunt insert the terminals of resistance R 1, R2 respectively through lead, are parallel with capacitor C 1, the C2 that is in series between another terminals of resistance R 1, R2; Described voltage sampling circuit comprises successively resistance R A4, RA5, RA6, RA8, RA7, RA11, the RA1 of series connection each other, and wherein the two ends of resistance R A1 are parallel with capacitor C 3;
Described power circuit comprises transformer TM1; The primary coil external AC of said transformer TM1; Transformer TM1 has two groups of secondary coils, and wherein one group of secondary coil is connected with voltage stabilizer UM3, and the two ends of another group secondary coil are connected with voltage stabilizer UM2 through commutation diode DM1.
Described electric energy meter circuit is characterized in that: described current acquisition module CT1 is the copper-manganese sheet.
The beneficial effect of the utility model:
The utility model adopts single-chip (SOC), will measure, liquid crystal drive is integrated in the chip piece, and the single-chip microcomputer, computation chip and the liquid crystal drive that have replaced traditional electric energy meter make up; Its EMC performance is better; Practice thrift hardware resource, effectively reduced the area of PCB simultaneously, reduced cost.
Description of drawings
Fig. 1 is the circuit theory diagrams of the utility model power circuit.
Fig. 2 is the circuit theory diagrams of the utility model display circuit.
Fig. 3 is the circuit theory diagrams of the utility model infrared communication circuit.
Fig. 4 is the circuit theory diagrams of the utility model 485 telecommunication circuits.
Fig. 5 is the circuit theory diagrams of the utility model memory circuit.
Fig. 6 is the circuit theory diagrams of the utility model governor circuit.
Fig. 7 is the circuit theory diagrams of the utility model current sampling circuit.
Fig. 8 is the circuit theory diagrams of the utility model voltage sampling circuit.
Embodiment
Referring to accompanying drawing; A kind of electric energy meter circuit includes governor circuit, display circuit, telecommunication circuit, memory circuit, metering circuit and power circuit, and display circuit, telecommunication circuit, memory circuit and metering circuit link to each other with governor circuit respectively; Display circuit is used for the current electric quantity of explicit user; Comprise LCDs LCD, LCDs LCD has 16 pins, and is connected with pull down resistor R6 ~ R21 respectively through lead;
Telecommunication circuit comprises infrared communication circuit and 485 telecommunication circuits; The infrared communication circuit is used to the person of checking meter and utilizes the on-the-spot copy reading electric quantity data of palm machine; Comprise far infrared transmitter L4 and far infrared receiver L3; The anode series resistance R 26 back external direct current power supplies of far infrared transmitter L4, the negative electrode of far infrared transmitter L4 is connected with triode Q1, the Q2 of common emitter, and wherein the collector of triode Q1 links to each other with the negative electrode of far infrared transmitter L4; The base stage of triode Q1 links to each other with the collector of triode Q2; The collector of triode Q2 inserts direct supply through resistance R 5, draws signal input part IRTXD behind the base stage outer meeting resistance R27 of triode Q2, and the two ends of resistance R 27 are parallel with capacitor C Z1; Draw signal output part IRRXD from the 1st terminals of far infrared receiver L3; The 2nd, 3 terminals of far infrared receiver L3 are respectively through lead ground connection and external direct current power supply; Be connected with resistance R 22 between the 1st, 3 terminals of far infrared receiver L3, be connected with capacitor C 11 between the 2nd, 3 terminals of far infrared receiver L3;
485 telecommunication circuits are used for long-range copy reading electric quantity data; Comprise duplex communication module U3; The RO end of duplex communication module U3 is through resistance R 35 external optocoupler OC1; The DE of duplex communication module U3 ,/the RE end is through the parallel with one another and external optocoupler OC2 of lead, and the DI of duplex communication module U3 end is through resistance R 50 ground connection, and the A of duplex communication module U3 end inserts the 1st pin of connector JP2 through thermistor PCT1; The B end of duplex communication module U3 inserts the 2nd pin of connector JP2 through thermistor PCT2; Be parallel with Transient Suppression Diode T1 between the A of duplex communication module U3, the B end, the end of Transient Suppression Diode T1 inserts direct supply through resistance R 37, and the other end of Transient Suppression Diode T1 is through resistance R 38 ground connection;
Memory circuit adopts the EEPROM of IIC standard interface, read-write number of times 1,000; 000 time, the power down data are not lost, and comprise single-chip microcomputer U2; The SCL of single-chip microcomputer U2, SDA end are respectively through resistance R 29, R28 external direct current power supply, and the A0 of single-chip microcomputer U2, A1, NC, WP end be ground connection altogether;
Governor circuit comprises CPU and peripheral circuit thereof, modules such as built-in high-capacity FLASH, RAM, internal clocking, integrating metrology and LCD driving, and through to CPU programming, and then the control external unit; Metering circuit carries out generated energy acquisition; Comprise current sampling circuit and voltage sampling circuit; Current sampling circuit comprises the copper-manganese sheet CT1 and the shunt shunt of mutual electrical connection; Two output terminals of shunt shunt insert the terminals of resistance R 1, R2 respectively through lead, are parallel with capacitor C 1, the C2 that is in series between another terminals of resistance R 1, R2; Voltage sampling circuit comprises successively resistance R A4, RA5, RA6, RA8, RA7, RA11, the RA1 of series connection each other, and wherein the two ends of resistance R A1 are parallel with capacitor C 3;
Power circuit comprises transformer TM1; The primary coil external AC of transformer TM1; Transformer TM1 has two groups of secondary coils, and wherein one group of secondary coil is connected with voltage stabilizer UM3, and the two ends of another group secondary coil are connected with voltage stabilizer UM2 through commutation diode DM1.The alternating voltage that transformer TM1 output two-way is isolated wherein behind one tunnel output process bridge rectifier and the capacitor filtering, obtains direct current 5V voltage through voltage stabilizer UM3, for above-mentioned each circuit provides working power; Another road output obtains direct current 5V voltage through voltage stabilizer UM2 behind half-wave rectification and capacitor filtering, be that 485 telecommunication circuits provide working power.

Claims (2)

1. electric energy meter circuit; Include governor circuit, display circuit, telecommunication circuit, memory circuit, metering circuit and power circuit; It is characterized in that: described display circuit, telecommunication circuit, memory circuit and metering circuit link to each other with governor circuit respectively; Described display circuit comprises LCDs LCD, and described LCDs LCD has 16 pins, and is connected with pull down resistor R6 ~ R21 respectively through lead;
Described telecommunication circuit comprises infrared communication circuit and 485 telecommunication circuits; Described infrared communication circuit comprises far infrared transmitter L4 and far infrared receiver L3; The anode series resistance R 26 back external direct current power supplies of described far infrared transmitter L4, the negative electrode of far infrared transmitter L4 is connected with triode Q1, the Q2 of common emitter, and wherein the collector of triode Q1 links to each other with the negative electrode of far infrared transmitter L4; The base stage of triode Q1 links to each other with the collector of triode Q2; The collector of triode Q2 inserts direct supply through resistance R 5, draws signal input part IRTXD behind the base stage outer meeting resistance R27 of triode Q2, and the two ends of resistance R 27 are parallel with capacitor C Z1; Draw signal output part IRRXD from the 1st terminals of said far infrared receiver L3; The 2nd, 3 terminals of far infrared receiver L3 are respectively through lead ground connection and external direct current power supply; Be connected with resistance R 22 between the 1st, 3 terminals of far infrared receiver L3, be connected with capacitor C 11 between the 2nd, 3 terminals of far infrared receiver L3; Described 485 telecommunication circuits comprise duplex communication module U3; The RO end of said duplex communication module U3 is through resistance R 35 external optocoupler OC1; The DE of duplex communication module U3 ,/RE end is through the parallel with one another and external optocoupler OC2 of lead; The DI end of duplex communication module U3 is through resistance R 50 ground connection; The A end of duplex communication module U3 is through the 1st pin of thermistor PCT1 access connector JP2, and the B end of duplex communication module U3 is parallel with Transient Suppression Diode T1 through the 2nd pin that thermistor PCT2 inserts connector JP2 between the A of duplex communication module U3, the B end; The end of said Transient Suppression Diode T1 inserts direct supply through resistance R 37, and the other end of Transient Suppression Diode T1 is through resistance R 38 ground connection;
Described memory circuit comprises single-chip microcomputer U2, and the SCL of said single-chip microcomputer U2, SDA end are respectively through resistance R 29, R28 external direct current power supply, and the A0 of single-chip microcomputer U2, A1, NC, WP end be ground connection altogether;
Described governor circuit comprises CPU and peripheral circuit thereof; Described metering circuit comprises current sampling circuit and voltage sampling circuit; Described current sampling circuit comprises the current acquisition module CT1 and the shunt shunt of mutual electrical connection; Two output terminals of said shunt shunt insert the terminals of resistance R 1, R2 respectively through lead, are parallel with capacitor C 1, the C2 that is in series between another terminals of resistance R 1, R2; Described voltage sampling circuit comprises successively resistance R A4, RA5, RA6, RA8, RA7, RA11, the RA1 of series connection each other, and wherein the two ends of resistance R A1 are parallel with capacitor C 3;
Described power circuit comprises transformer TM1; The primary coil external AC of said transformer TM1; Transformer TM1 has two groups of secondary coils, and wherein one group of secondary coil is connected with voltage stabilizer UM3, and the two ends of another group secondary coil are connected with voltage stabilizer UM2 through commutation diode DM1.
2. electric energy meter circuit according to claim 1 is characterized in that: described current acquisition module CT1 is the copper-manganese sheet.
CN2011204205623U 2011-10-28 2011-10-28 Electric energy meter circuit Expired - Fee Related CN202305664U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011204205623U CN202305664U (en) 2011-10-28 2011-10-28 Electric energy meter circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011204205623U CN202305664U (en) 2011-10-28 2011-10-28 Electric energy meter circuit

Publications (1)

Publication Number Publication Date
CN202305664U true CN202305664U (en) 2012-07-04

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ID=46374536

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011204205623U Expired - Fee Related CN202305664U (en) 2011-10-28 2011-10-28 Electric energy meter circuit

Country Status (1)

Country Link
CN (1) CN202305664U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103217574A (en) * 2013-03-20 2013-07-24 国家电网公司 Metering device of checking tool of electric energy data
CN104898580A (en) * 2014-03-04 2015-09-09 沈阳中科奥维科技股份有限公司 Wireless oil pumping unit controller with three-phase electric acquisition
CN105183070A (en) * 2015-09-25 2015-12-23 国网山东阳谷县供电公司 Intelligent meter 485 port voltage stabilizing device and work method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103217574A (en) * 2013-03-20 2013-07-24 国家电网公司 Metering device of checking tool of electric energy data
CN103217574B (en) * 2013-03-20 2015-09-02 国家电网公司 A kind of electric energy data checks the metering outfit of instrument
CN104898580A (en) * 2014-03-04 2015-09-09 沈阳中科奥维科技股份有限公司 Wireless oil pumping unit controller with three-phase electric acquisition
CN105183070A (en) * 2015-09-25 2015-12-23 国网山东阳谷县供电公司 Intelligent meter 485 port voltage stabilizing device and work method thereof

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120704

Termination date: 20191028