CN205068599U - One -phase fee -controlling intelligent electric energy meter - Google Patents
One -phase fee -controlling intelligent electric energy meter Download PDFInfo
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- CN205068599U CN205068599U CN201520790393.0U CN201520790393U CN205068599U CN 205068599 U CN205068599 U CN 205068599U CN 201520790393 U CN201520790393 U CN 201520790393U CN 205068599 U CN205068599 U CN 205068599U
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Abstract
One -phase fee -controlling intelligent electric energy meter, it relates to electrician's instrument and meter industry electric energy measurement field, for the interference problem of solution in scene operation and installation, the utility model provides an one -phase fee -controlling intelligent electric energy meter, it comprises hardware and software two parts, wherein hardware includes safe encrypted circuit, the display circuit, relay control and power supply abnormal detection circuitry, current sampling circuit, voltage sampling circuit, the metering circuit, power supply circuit, master control microprocessor, battery and detection circuitry, the memory circuit, multi -functional pulse output circuit, infrared communication circuit, carrier wave communication circuit and RS485 communication circuit, the hardware part has increased heteropolarity and the general RS485 communication circuit of nonpolarity chip, carrier communication module and the general circuit of micropower communication module have been increased, power supply abnormal detection circuitry and load switch malfunction detection circuitry have been increased. Ripple voltage 0.4 per mill when power supply circuit is used for the carrier communication power supply, the utility model discloses safe and reliable, the sexual valence relative altitude, economic benefits is good.
Description
Technical field
The utility model patent belongs to electrotechnical instrument and meter industry electric energy metrical field, particularly a kind of single-phase charge-controlled intelligent electric meter.
Background technology
Electric energy meter is as the specially-used measuring instrument of electric power users power consumption, experienced by the development from induction type electric energy meter to electronic power meter, wherein electronic power meter functionally experienced by again the developing stage such as ordinary electronic formula electric energy meter, multi-rate meter, prepayment meter, multifunctional electric energy meter.
Current existing electric energy meter utilizes main website to check meter at a distance, greatly improves accuracy of checking meter, effectively avoids the error of manual metering, and can remote inquiry ammeter real time data, help electric company and the power consumer very first time to obtain abnormal conditions, conveniently rush to repair in time, reduce power off time.
But due to existing intelligent electric meter Software for Design, hardware design, there is certain defect in the aspects such as components selection, considers not enough simultaneously, run at the scene and there occurs many problems in installation process during design to field condition and rugged surroundings:
1. due to the defect of hardware circuit itself, when ammeter uses, bring ripple to electrical network, make resonance occurs in electrical network and cause excess current or superpotential and accidents caused, increasing added losses, reduce generating, the efficiency of transmission of electricity and consumer and plant factor;
2., under strong magnetic environment, because transformer does not prevent the measure of strong magnetic, transformer back end current becomes large, when reaching the threshold value of thermistor action, causing electric energy meter to crash, cannot effectively measure, provide opportunity to user's stealing;
3. Ge Bie producer is for the consideration of the reasons such as cost needs, and censorship ammeter is inconsistent with supply of material ammeter;
4. some users are due to the restriction of site environment, and it is bad that effect data is copied and accepted in carrier communication.
Summary of the invention
The utility model content overcomes the deficiencies in the prior art, provide a kind of single-phase charge-controlled intelligent electric meter, it is made up of hardware and software two parts, wherein hardware comprises security encryption circuit, display circuit, Control and power supply abnormality detection circuit, current sampling circuit, voltage sampling circuit, metering circuit, power circuit, main control microprocessor, battery and testing circuit, memory circuit, multifunctional pulse output circuit, infrared communication circuit, carrier communication circuit and RS485 telecommunication circuit, it is characterized in that main control microprocessor respectively with security encryption circuit, display circuit, Control and power supply abnormality detection circuit, current sampling circuit, voltage adopts circuit, metering circuit, power circuit, battery and testing circuit, memory circuit, multifunctional pulse output circuit, infrared communication circuit, carrier communication circuit is connected with RS485 telecommunication circuit, main control microprocessor realizes two-way communication after being connected with security encryption circuit, memory circuit, infrared communication circuit, carrier communication circuit and RS485 telecommunication circuit respectively, the electric current that metering circuit adopts circuit to sample respectively to current sampling circuit and voltage and voltage signal carry out related operation and process, display circuit is the electricity of display active user day part and combines total electricity, multifunctional pulse output circuit is that pulse per second (PPS) and period switching pulse export multiplex circuit, battery and testing circuit provide standby power supply for electric energy meter.
Further, described RS485 telecommunication circuit has polarity and nonpolarity chip universal circuit.
Further, described carrier communication circuit is carrier communication module and micropower communication module universal circuit.
Further, described power circuit is used for ripple voltage 0.4 ‰ when carrier communication is powered.
Wherein, metering circuit adopts high-precision electric energy the special metering IC, completes and carries out related operation and process to the electric current of sampling and voltage signal, realize power measurement and output of pulse signal function; Described power circuit provides power supply for whole electric energy meter system, by rectification, by volt High Level AC Voltage of 220 in the supply line at ammeter place, is converted to and can, for system low-voltage DC directly, uses Switching Power Supply to reduce the ripple of supply carrier module; Described battery and testing circuit, for ensureing that whole electric meter system can normally work under accident or catastrophic failure situation, provide standby power supply when designing for it, be generally lithium battery, to guarantee the normal operation of whole system, when cell voltage is lower than 3V, electric alarm owed by display battery; The combined floodgate of described Control and power supply abnormality detection circuit pilot relay and tripping operation realize the object controlled user power utilization, and the externally fed detecting electric energy meter is when electric energy meter normal working voltage scope, but electric energy meter internal processor operating voltage is abnormal, for the built-in electric energy meter of on-load switch, detect the misoperation of table internal loading switch; Described RS485 telecommunication circuit refers to and utilizes RS485 communication protocol electric energy transmitting table data and Long-distance Control electric energy meter; Described main control microprocessor is by SPI and I
2c bus mode controls the running status of peripheral each module, realizes the various functions of electric energy meter; Described memory circuit is that system adopts EEPROM, i.e. EPROM (Erasable Programmable Read Only Memory) when designing, and stores and record mass data, under the power-down conditions caused in various accident and burst accident being ensured simultaneously, and not disappearing and longer-term storage of user power utilization data.Described carrier communication circuit utilizes existing power transmission and distribution power line network as transmission medium, realizes data transmission and a kind of circuit of message exchange, realizes the networking of the long-range electricity-selling system of electric energy meter and power department.Described infrared communication circuit is the portable infrared copying instrument of meter reading personnel and the intelligent electric energy meter infrared communication being positioned at user side, realizes electric quantity data copy reading and Long-distance Control.The information such as segment table, electricity name day when long-range electricity-selling system issues multi tariff by virtual medium (mainly carrier wave communicates with RS485) to expense control electric energy meter.Described security encryption circuit realizes the safety control functions such as safe storage, data enciphering/deciphering, bidirectional identity authentication, Access control, link encryption transmission, is the requisite ingredient of single-phase electric energy meter.
Measurement module program is responsible computation chip initialization: computation chip initialization, register data initialization; Measure: magnitude of voltage is measured, two channel currents are measured, and two channel powers and power direction are measured, and two channel power factors are measured, grid frequency measurement, and computation chip data check; Error correction: 1.0,100%Ib point tolerance corrects, 1.0,100%Ib point voltage, electric current, power displayed value corrects, 0.5L, 100%Ib phase error correction, and 1.0,5%Ib point tolerance corrects, initialization of register interface.Described metering module program is responsible for impulse sampling; Electricity adds up and stores processor: combine electric quantity metering, electricity accumulation process, stores processor; Electricity is settled accounts: regular way settlement and the clearing that have a power failure, power on and mend clearing, and settlement packets is containing monthly clearing, and billing cycle is settled accounts.Described data processing module refers to default data initialization and zeros data: electric energy meter parameter composes default value, and event is freezed to wait clearing; RAM data check after powering on initialization; The safety and reliability inspection of data.Described system processing module program is responsible for time task scheduling process; Ammeter running status word is synchronous; Parameter modification processing load record, active reporting status word is synchronous, key updating process; System time obtains interface, time validity checking interface; Various interrupt source service subprogram, general assignment scheduling and power-on and power-off process.Described load control module program is responsible for relay relevant action and logout; The initialization of Control related data.Described Communications Processor Module program is responsible for communication read data; Subsequent frame is read in communication; Address reads; Data are write in communication; Freeze command; Ammeter resets and resets with event; Long-distance Control; Safety certification.Described event is freezed modular program and is responsible for freezing; Logout; Load record.
The utility model has following advantage: 1. ripple voltage 0.4 ‰, far below national grid standard 1 ‰ requirement.2. transformer outside increases anti-shielded metal shell, reduces strong magnetic interference.3. add electric energy meter software comparison function.4. devise the telecommunication circuit that polarity and nonpolarity RS485 chip are all suitable for.5. design carrier communication module and micropower communication module universal circuit.6. optimize remote bill control and load curve copy reading function.7. hardware design modularization, Software for Design standardization, product up-gradation and maintenance are convenient in the increase of embedded program versatility.The utility model is safe and reliable, and cost performance is high, good in economic efficiency, is subject to the consistent favorable comment of leading body at a higher level and client.
Accompanying drawing explanation
Fig. 1 is single-phase charge-controlled intelligent electric meter theory diagram.
Embodiment
With reference to accompanying drawing 1, the single-phase charge-controlled intelligent electric meter described in this embodiment comprises security encryption circuit, display circuit, Control and power supply abnormality detection circuit, current sampling circuit, voltage sampling circuit, metering circuit, power circuit, main control microprocessor, battery and testing circuit, memory circuit, multifunctional pulse output circuit, infrared communication circuit, carrier communication circuit and RS485 telecommunication circuit.Various hardware circuit function is as follows:
Metering circuit: carry out related operation and process to sampled voltage and current signal, realizes power measurement and output of pulse signal function.
Power circuit: for whole electric energy meter system provides power supply.
Battery and testing circuit: for electric energy meter provides standby power supply, be generally lithium battery, to guarantee the normal operation of whole system, when cell voltage is lower than 3V, electric alarm owed by display battery.
Control and power supply abnormality detection circuit: the combined floodgate of pilot relay and the control realized user power utilization of tripping, detect the externally fed of electric energy meter when electric energy meter normal working voltage scope, but electric energy meter internal processor operating voltage is abnormal, for the built-in electric energy meter of on-load switch, detect the misoperation of table internal loading switch.
RS485 telecommunication circuit: utilize RS485 communication protocol electric energy transmitting table data and Long-distance Control electric energy meter.
Main control microprocessor: by SPI and I
2c bus mode controls the running status of peripheral each module, realizes the various functions of electric energy meter.
Memory circuit: system adopts EEPROM, i.e. EPROM (Erasable Programmable Read Only Memory) when designing, stores and record mass data, under the power-down conditions caused in various accident and burst accident being ensured simultaneously, and not disappearing and longer-term storage of user power utilization data.
Control relay circuit: the combined floodgate of pilot relay and tripping operation realize the object controlled user power utilization.
Carrier communication circuit: utilize existing power transmission and distribution power line network as transmission medium, realizes data transmission and a kind of circuit of message exchange, realizes the networking of the long-range electricity-selling system of electric energy meter and power department.
Infrared communication circuit: portable infrared copying instrument and the intelligent electric energy meter infrared communication being positioned at user side of meter reading personnel, realize electric quantity data copy reading and Long-distance Control.
Multifunctional pulse output circuit: be that pulse per second (PPS) and period switching pulse export multiplex circuit.
Display circuit: show the electricity of active user's day part and combine total electricity.The information such as segment table, electricity name day when long-range electricity-selling system issues multi tariff by virtual medium (mainly carrier wave communicates with RS485) to expense control electric energy meter.
Security encryption circuit: realize the safety control functions such as safe storage, data enciphering/deciphering, bidirectional identity authentication, Access control, link encryption transmission.
Function of the present utility model is realized by software program, and software program of the present utility model comprises measurement module program, metering module program, data processing module program, system processing module program, load control module program, Communications Processor Module program, event freeze modular program.
Various software function is as follows:
Measurement module program: computation chip initialization: computation chip initialization, register data initialization; Measure: magnitude of voltage is measured, two channel currents are measured, and two channel powers and power direction are measured, and two channel power factors are measured, grid frequency measurement, and computation chip data check; Error correction: 1.0,100%Ib point tolerance corrects, 1.0,100%Ib point voltage, electric current, power displayed value corrects, 0.5L, 100%Ib phase error correction, and 1.0,5%Ib point tolerance corrects, initialization of register interface.
Metering module program: impulse sampling; Electricity adds up and stores processor: combine electric quantity metering, electricity accumulation process, stores processor; Electricity is settled accounts: regular way settlement and the clearing that have a power failure, power on and mend clearing, and settlement packets is containing monthly clearing, and billing cycle is settled accounts.
Data processing module program: default data initialization and zeros data: electric energy meter parameter composes default value, event is freezed to wait clearing; RAM data check after powering on initialization; The safety and reliability inspection of data.
System processing module program: time task scheduling process; Ammeter running status word is synchronous; Parameter modification processing load record, active reporting status word is synchronous, key updating process; System time obtains interface, time validity checking interface; Various interrupt source service subprogram, general assignment scheduling and power-on and power-off process.
Load control module program: relay relevant action and logout; The initialization of Control related data.
Communications Processor Module program: communication read data; Subsequent frame is read in communication; Address reads; Data are write in communication; Freeze command; Ammeter resets and resets with event; Long-distance Control; Safety certification.
Event freezes modular program: be responsible for freezing; Logout; Load record.
Claims (4)
1. single-phase charge-controlled intelligent electric meter, comprise security encryption circuit, display circuit, Control and power supply abnormality detection circuit, current sampling circuit, voltage sampling circuit, metering circuit, power circuit, main control microprocessor, battery and testing circuit, memory circuit, multifunctional pulse output circuit, infrared communication circuit, carrier communication circuit and RS485 telecommunication circuit, it is characterized in that main control microprocessor respectively with security encryption circuit, display circuit, Control and power supply abnormality detection circuit, current sampling circuit, voltage adopts circuit, metering circuit, power circuit, battery and testing circuit, memory circuit, multifunctional pulse output circuit, infrared communication circuit, carrier communication circuit is connected with RS485 telecommunication circuit, main control microprocessor realizes two-way communication after being connected with security encryption circuit, memory circuit, infrared communication circuit, carrier communication circuit and RS485 telecommunication circuit respectively, the electric current that metering circuit adopts circuit to sample respectively to current sampling circuit and voltage and voltage signal carry out related operation and process, display circuit is the electricity of display active user day part and combines total electricity, multifunctional pulse output circuit is that pulse per second (PPS) and period switching pulse export multiplex circuit, battery and testing circuit provide standby power supply for electric energy meter.
2. single-phase charge-controlled intelligent electric meter according to claim 1, is characterized in that described RS485 telecommunication circuit has polarity and nonpolarity chip universal circuit.
3. single-phase charge-controlled intelligent electric meter according to claim 1, is characterized in that described carrier communication circuit is carrier communication module and micropower communication module universal circuit.
4. single-phase charge-controlled intelligent electric meter according to claim 1, ripple voltage 0.4 ‰ when it is characterized in that described power circuit is powered for carrier communication.
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| CN201520790393.0U CN205068599U (en) | 2015-10-14 | 2015-10-14 | One -phase fee -controlling intelligent electric energy meter |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106097589A (en) * | 2016-06-12 | 2016-11-09 | 宁波迦南电子有限公司 | A kind of embedded management system of single-phase charge-controlled intelligent electric meter |
| CN106127960A (en) * | 2016-06-12 | 2016-11-16 | 宁波迦南电子有限公司 | A kind of single-phase charge-controlled intelligent electric meter |
| CN106353544A (en) * | 2016-10-12 | 2017-01-25 | 黑龙江省电工仪器仪表工程技术研究中心有限公司 | COG (Chip on Glass) single-phase intelligent ammeter |
| CN106097588B (en) * | 2016-06-15 | 2018-11-02 | 无锡市恒通电器有限公司 | A kind of single-phase cost-control intelligent ammeter |
| CN110716085A (en) * | 2019-11-11 | 2020-01-21 | 黑龙江省电工仪器仪表工程技术研究中心有限公司 | Single-phase electric energy meter with LoRa communication function |
| CN111862572A (en) * | 2020-08-20 | 2020-10-30 | 杭州华罡智能科技有限公司 | RS485 terminal meter reading system and meter reading mode |
-
2015
- 2015-10-14 CN CN201520790393.0U patent/CN205068599U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106097589A (en) * | 2016-06-12 | 2016-11-09 | 宁波迦南电子有限公司 | A kind of embedded management system of single-phase charge-controlled intelligent electric meter |
| CN106127960A (en) * | 2016-06-12 | 2016-11-16 | 宁波迦南电子有限公司 | A kind of single-phase charge-controlled intelligent electric meter |
| CN106097588B (en) * | 2016-06-15 | 2018-11-02 | 无锡市恒通电器有限公司 | A kind of single-phase cost-control intelligent ammeter |
| CN106353544A (en) * | 2016-10-12 | 2017-01-25 | 黑龙江省电工仪器仪表工程技术研究中心有限公司 | COG (Chip on Glass) single-phase intelligent ammeter |
| CN110716085A (en) * | 2019-11-11 | 2020-01-21 | 黑龙江省电工仪器仪表工程技术研究中心有限公司 | Single-phase electric energy meter with LoRa communication function |
| CN111862572A (en) * | 2020-08-20 | 2020-10-30 | 杭州华罡智能科技有限公司 | RS485 terminal meter reading system and meter reading mode |
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