CN204631124U - A kind of SOC three-phase electric energy watch circuit - Google Patents
A kind of SOC three-phase electric energy watch circuit Download PDFInfo
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- CN204631124U CN204631124U CN201520171418.9U CN201520171418U CN204631124U CN 204631124 U CN204631124 U CN 204631124U CN 201520171418 U CN201520171418 U CN 201520171418U CN 204631124 U CN204631124 U CN 204631124U
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Abstract
The utility model discloses a kind of SOC three-phase electric energy watch circuit, it comprises V9003 chip control circuit, power circuit, voltage sampling circuit, current sampling circuit, LCD display circuit, RS485 telecommunication circuit, infrared communication circuit, 24LC512 data storage circuitry, LED indicating circuit, impulse output circuit, key circuit, comprise metering circuit and MCU circuit in V9003 chip control circuit, metering circuit and MCU circuit are made up of the SOC type V9003 chip and peripheral circuit comprising metering and MCU circuit; The three-phase SOC type V9003 chip that the utility model adopts an integral type integrated, by computation chip and MCU on one chip integrated, make that whole circuit structure is simplified, circuit board is little, measuring accuracy is high, clock accuracy is high, display data are succinct, can Speeding up development progress, reduce production cost.
Description
Technical field
The utility model relates to electric energy meter technical field, particularly relates to a kind of SOC three-phase electric energy watch circuit.
Background technology
The design proposal of existing three-phase electric energy meter both domestic and external has multi-chip and single-chip two kinds:
Wherein single chip solution (SOC), computation chip and MCU are integrated in chip piece, its advantage is that the simple cost of circuit is low, shortcoming is that measuring accuracy and clock accuracy are low, poor reliability, do not reach the technical requirement of state's net intelligent electric energy meter, can only be used for designing easy data acquisition instrument;
Wherein multi-chip scheme (combined type scheme), the data such as voltage, electric current, power factor relevant with electric energy metrical by the sampling of special-purpose multifunctional electric energy computation chip, the meritorious forward and reverse electricity of metering; By the management of computing of chip microcontroller data, display, communication, storage and revenue insurance, realize the measuring requirement of tou power price and gradient electricity price.The advantage of multi-chip scheme is that metering and clock accuracy are high, and reliability is high, can meet the technical requirement of State Grid Corporation of China to intelligent electric meter; Shortcoming is that circuit is slightly complicated, and cost is slightly high, is applicable to the senior measuring instrument of design.
Summary of the invention
For overcoming the deficiencies in the prior art, the utility model provide a kind ofly to measure accurately, SOC three-phase electric energy watch circuit that cost is low.
The utility model for the technical scheme reaching above-mentioned technical purpose and adopt is: a kind of SOC three-phase electric energy watch circuit, it comprises V9003 chip control circuit, power circuit, voltage sampling circuit, current sampling circuit, LCD display circuit, RS485 telecommunication circuit, infrared communication circuit, 24LC512 data storage circuitry, LED indicating circuit, impulse output circuit, key circuit, wherein:
Described V9003 chip control circuit comprises metering circuit and MCU circuit, metering circuit processes voltage, current signal, export meritorious, idle pulse signal, the continuous datas such as voltage, electric current, power, power factor, electric energy are provided for system, MCU circuit completes the function of electric energy metrical, data processing, Graphics Processing, communication process, keystroke handling, Systematical control, and metering circuit and MCU circuit are made up of the SOC type V9003 chip and peripheral circuit comprising metering and MCU circuit;
Described power circuit is made up of reduction voltage circuit, rectification circuit, filtering circuit, mu balanced circuit, battery and peripheral circuit;
Described voltage sampling circuit by 3 independently resistance pressure-dividing network, filtering circuit form, described voltage sampling circuit converts voltage signal Ua, Ub, Uc to low-voltage and is input to computation chip, and voltage sampling circuit provides voltage signal for system;
Described current sampling circuit by 3 independently current transformer, sampling resistor, filtering circuit form, described current sampling circuit converts current signal Ia, Ib, Ic to voltage signal and is input to computation chip, and current sampling circuit provides current signal for system;
Described LCD display circuit is made up of 1 LCD display part and peripheral circuit;
Described RS485 telecommunication circuit is made up of 1 485 chip periphery circuit, 2 photoelectrical couplers, 1 TVS pipe, 1 thermistor;
Described infrared communication circuit is made up of 1 infrared receiving tube, 1 infrared transmitting tube and peripheral circuit;
Described 24LC512 data storage circuitry is used for supplemental characteristic, the service data of saved system, and after having a power failure, data are not lost, and are made up of storage chip 24LC512 and peripheral circuit;
Described LED indicating circuit is used to indicate the failure message of electric energy meter, is made up of 1 LED and peripheral circuit;
Described impulse output circuit, for detecting the measuring accuracy of active energy, reactive energy, is made up of 2 LED, 2 photoelectrical couplers and peripheral circuit;
Described key circuit is used for LCD liquid crystal display and turns over screen, program enable switch, is made up of 1 reading button, 1 program switch button, peripheral circuit.
Described power circuit exports the separate power supply of two-way: the first power supply and second source, first power supply provides power supply to V9003 chip control circuit, infrared communication circuit, second source provides power supply to RS485 telecommunication circuit, is also provided with reserve battery in described power circuit; During normal work, V9003 chip is by the first power source, provides power supply during power failure by reserve battery, and after Power resumption, the supplemental characteristic of electric energy meter, service data are not lost, when clock continues to walk.
The LCD that LCD display part in described LCD display circuit connects V9003 chip drives port SEG0-SEG35, COM0-COM3, and V9003 chip is by built-in LCD driver module Direct driver LCD display part.
Described RS485 telecommunication circuit output terminal is provided with protection circuit, and described protection circuit comprises TVS pipe, thermistor; 485 communication lines are protected not to be damaged when thunderbolt and forceful electric power misconnection.
Described impulse output circuit connects port CF1, CF2 of V9003 chip, exports meritorious pulse, idle pulse indication information to detection port by photoelectrical coupler.
The chip 24LC512 of described data storage circuitry is connected with P16, P13 port of the V9003 chip of control circuit by SCL, SDA port; V9003 chip port P16, P13 simulate SCL, SDA, adopt the data of I2C bus read-write storage chip.
The beneficial effects of the utility model are: adopt said structure, adopt the three-phase SOC type V9003 chip that an integral type is integrated, by computation chip and MCU on one chip integrated, make that whole circuit structure is simplified, circuit board is little, measuring accuracy is high, clock accuracy is high, display data are succinct, energy Speeding up development progress, reduces production cost.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail.Wherein:
Fig. 1 is the theory diagram of the utility model SOC three-phase electric energy watch circuit;
Fig. 2 is the circuit theory diagrams of the utility model V9003 chip control circuit.
Embodiment
By describing technology contents of the present utility model, structural attitude in detail, realized object and effect, accompanying drawing is coordinated to describe in detail below in conjunction with embodiment.
Refer to shown in Fig. 1 and Fig. 2, the utility model SOC three-phase electric energy watch circuit comprises V9003 chip control circuit 1, power circuit 2, voltage sampling circuit 3, current sampling circuit 4, LCD display circuit 5, RS485 telecommunication circuit 6, infrared communication circuit 7,24LC512 data storage circuitry 8, LED indicating circuit 9, impulse output circuit 10, key circuit 11, wherein:
Described V9003 chip control circuit 1 comprises metering circuit and MCU circuit, metering circuit is to voltage, current signal processes, export meritorious, idle pulse signal, for system provides voltage, electric current, power, power factor, the continuous datas such as electric energy, MCU circuit completes electric energy metrical, data processing, Graphics Processing, communication process, keystroke handling, the function of Systematical control, metering circuit and MCU circuit are made up of the V9003 chip of SOC type and peripheral circuit comprising metering and MCU circuit, V9003 chip is a integrated electric energy metrical of Hangzhou Vango Science & Technology Co., Ltd., the three-phase SOC of MCU function,
Described power circuit 2 is made up of reduction voltage circuit, rectification circuit, filtering circuit, mu balanced circuit, battery and peripheral circuit, reduction voltage circuit by 3 independently transformer form, each transformer is made up of 1 primary coil and 2 secondary coils;
By 3, independently resistance pressure-dividing network, filtering circuit form described voltage sampling circuit 3, described voltage sampling circuit 3 converts voltage signal Ua, Ub, Uc to low-voltage and is input to computation chip, voltage sampling circuit 3 provides voltage signal for system, voltage sampling circuit 3 one end connects voltage input interface Ua, Ub, Uc, Un, and the other end connects port UAP, UBP, UCP, UN of V9003 chip;
By 3, independently current transformer, sampling resistor, filtering circuit form described current sampling circuit 4, described current sampling circuit 4 converts current signal Ia, Ib, Ic to voltage signal and is input to computation chip, current sampling circuit 4 provides current signal for system, current sampling circuit 4 one end connects electric current input interface Ia+, Ia-, Ib+, Ib-, Ic+, Ic-, and the other end connects port IAP, IAN, IBP, IBN, ICP, ICN of V9003 chip;
Described LCD display circuit 5 is made up of 1 LCD display part and peripheral circuit;
Described RS485 telecommunication circuit 6 is made up of 1 485 chip periphery circuit, 2 photoelectrical couplers, 1 TVS pipe, 1 thermistor, UART5 port TXD5, RXD5 of V9003 chip connect the photoelectric coupling circuit in RS485 telecommunication circuit 6, and photoelectric coupling circuit connects RO, DE/RE, RI port in RS485 telecommunication circuit 6;
Described infrared communication circuit 7 is made up of 1 infrared receiving tube, 1 infrared transmitting tube and peripheral circuit, and UART2 port TXD2, RXD2 of V9003 chip connect infrared transmitting tube, the infrared receiving tube of infrared communication circuit 7;
Described 24LC512 data storage circuitry 8 is for supplemental characteristic, the service data of saved system, the rear data of energising again that have a power failure are not lost, be made up of storage chip 24LC512 and peripheral circuit, the chip 24LC512 in described 24LC512 data storage circuitry 8 is connected with P16, P13 port of V9003 chip by SCL, SDA port; V9003 chip port P16, P13 simulate SCL, SDA, adopt the data of I2C bus read-write storage chip;
Described LED indicating circuit 9 is used to indicate the failure message of electric energy meter, is made up of 1 LED and peripheral circuit, and described LED indicating circuit 9 connects the port P32 of V9003 chip;
Described impulse output circuit 10, for detecting the measuring accuracy of active energy, reactive energy, is made up of 2 LED, 2 photoelectrical couplers and peripheral circuit;
Described key circuit 11 turns over screen, program enable switch for LCD liquid crystal display, and be made up of 1 reading button, 1 program switch button, peripheral circuit, described key circuit 11 connects port P24, P11 of V9003 chip.
Described power circuit 2 exports the separate power supply of two-way: the first power supply 21 and second source 22, first power supply 21 gives V9003 chip control circuit 1, infrared communication circuit 7 provides power supply, second source 22 provides power supply to RS485 telecommunication circuit 6, is also provided with reserve battery 23 in described power circuit.
The LCD that LCD display part in described LCD display circuit 5 connects V9003 chip drives port SEG0-SEG35, COM0-COM3, and V9003 chip is by built-in LCD driver module Direct driver LCD display part.
Described RS485 telecommunication circuit 6 output terminal is provided with protection circuit 61, and described protection circuit 61 comprises TVS pipe, thermistor, and described RS485 telecommunication circuit 6 connects UART5 port TXD5, RXD5 of V9003 chip through photoelectrical coupler.
Described impulse output circuit 10 connects port CF1, CF2 of V9003 chip, exports meritorious pulse, idle pulse indication information to detection port by photoelectrical coupler.
The foregoing is only embodiment of the present utility model; not thereby the scope of the claims of the present utility model is limited; every equivalent structure transformation utilizing the utility model instructions and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (6)
1. a SOC three-phase electric energy watch circuit, it is characterized in that: comprise V9003 chip control circuit, power circuit, voltage sampling circuit, current sampling circuit, LCD display circuit, RS485 telecommunication circuit, infrared communication circuit, 24LC512 data storage circuitry, LED indicating circuit, impulse output circuit, key circuit, wherein:
Described V9003 chip control circuit comprises metering circuit and MCU circuit, metering circuit processes voltage, current signal, export meritorious, idle pulse signal, for system provides voltage, electric current, power, power factor, electric energy measurement data, MCU circuit completes the function of electric energy metrical, data processing, Graphics Processing, communication process, keystroke handling, Systematical control, and metering circuit and MCU circuit are made up of the SOC type V9003 chip and peripheral circuit comprising metering and MCU circuit;
Described power circuit is made up of reduction voltage circuit, rectification circuit, filtering circuit, mu balanced circuit, battery and peripheral circuit;
Described voltage sampling circuit by 3 independently resistance pressure-dividing network, filtering circuit form, described voltage sampling circuit converts voltage signal Ua, Ub, Uc to low-voltage and is input to computation chip, and voltage sampling circuit provides voltage signal for system;
Described current sampling circuit by 3 independently current transformer, sampling resistor, filtering circuit form, described current sampling circuit converts current signal Ia, Ib, Ic to voltage signal and is input to computation chip, and current sampling circuit provides current signal for system;
Described LCD display circuit is made up of 1 LCD display part and peripheral circuit;
Described RS485 telecommunication circuit is made up of 1 485 chip periphery circuit, 2 photoelectrical couplers, 1 TVS pipe, 1 thermistor;
Described infrared communication circuit is made up of 1 infrared receiving tube, 1 infrared transmitting tube and peripheral circuit;
Described 24LC512 data storage circuitry is used for supplemental characteristic, the service data of saved system, and after having a power failure, data are not lost, and are made up of storage chip 24LC512 and peripheral circuit;
Described LED indicating circuit is used to indicate the failure message of electric energy meter, is made up of 1 LED and peripheral circuit;
Described impulse output circuit, for detecting the measuring accuracy of active energy, reactive energy, is made up of 2 LED, 2 photoelectrical couplers and peripheral circuit;
Described key circuit is used for LCD liquid crystal display and turns over screen, program enable switch, is made up of 1 reading button, 1 program switch button, peripheral circuit.
2. a kind of SOC three-phase electric energy watch circuit according to claim 1, it is characterized in that: described power circuit exports the separate power supply of two-way: the first power supply and second source, first power supply provides power supply to V9003 chip control circuit, infrared communication circuit, second source provides power supply to RS485 telecommunication circuit, is also provided with reserve battery in described power circuit.
3. a kind of SOC three-phase electric energy watch circuit according to claim 1, it is characterized in that: the LCD that the LCD display part in described LCD display circuit connects V9003 chip drives port SEG0-SEG35, COM0-COM3, and V9003 chip is by built-in LCD driver module Direct driver LCD display part.
4. a kind of SOC three-phase electric energy watch circuit according to claim 1, is characterized in that: described RS485 telecommunication circuit output terminal is provided with protection circuit, and described protection circuit comprises TVS pipe, thermistor.
5. a kind of SOC three-phase electric energy watch circuit according to claim 1, is characterized in that: described impulse output circuit connects port CF1, CF2 of V9003 chip, exports meritorious pulse, idle pulse indication information to detection port by photoelectrical coupler.
6. a kind of SOC three-phase electric energy watch circuit according to claim 1, is characterized in that: the chip 24LC512 of described data storage circuitry is connected with P16, P13 port of the V9003 chip of control circuit by SCL, SDA port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520171418.9U CN204631124U (en) | 2015-03-25 | 2015-03-25 | A kind of SOC three-phase electric energy watch circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520171418.9U CN204631124U (en) | 2015-03-25 | 2015-03-25 | A kind of SOC three-phase electric energy watch circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204631124U true CN204631124U (en) | 2015-09-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520171418.9U Expired - Fee Related CN204631124U (en) | 2015-03-25 | 2015-03-25 | A kind of SOC three-phase electric energy watch circuit |
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| Country | Link |
|---|---|
| CN (1) | CN204631124U (en) |
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2015
- 2015-03-25 CN CN201520171418.9U patent/CN204631124U/en not_active Expired - Fee Related
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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 |
Granted publication date: 20150909 Termination date: 20170325 |
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| CF01 | Termination of patent right due to non-payment of annual fee |