CN202693653U - Single-phase fee control intelligent electric energy meter - Google Patents

Abstract

The utility model relates to a single-phase fee control intelligent electric energy meter which comprises a shell, a microprocessor and an electric energy measuring unit, wherein the microprocessor and the electric energy measuring unit are arranged inside the shell; the microprocessor is connected with the electric energy measuring unit, a relay control circuit, a data storage circuit, a carrier communication circuit, a RS485 communication circuit, an infrared communication circuit, an LCD (Liquid Crystal Display) display unit and a clock circuit through a singlechip interface circuit; the microprocessor is further provided with an alternative display button, a programming button, a power supply monitoring circuit, a watchdog and an ESAM (Embedded Secure Access Module); the electric energy measuring unit is mainly provided with a current sampling circuit, a voltage sampling circuit and a measuring chip which are connected and subsequently accessed to the microprocessor; the relay control circuit is used for realizing the power on and off and is mainly composed of a magnetic latching relay, a plurality of triode, capacitors and resistors; and a communication unit inside the electric energy measuring is formed by the carrier communication circuit, the RS485 communication circuit and the infrared communication circuit. The single-phase fee control intelligent electric energy meter is compact and reasonable in design, and advanced electric energy measuring chip and an intelligent encryption technique are adopted.

Description

Single-phase charge-controlled intelligent electric meter

Technical field

The utility model relates to a kind of electronic instrument, particularly a kind of single-phase charge-controlled intelligent electric meter with operation of power networks charging, electric energy acquisition and remote control function.

Background technology

At present, in electric system, the electric power summation of all kinds of consumer consumption of a certain moment is called electric load.Electric load is temporal evolution, available day (or year) load curve is described, when electric load rolls up, can form the load peak of electrical network, and when electric load reduces in a large number, can form again the electric load low ebb, when the difference of the peak value on the load curve and valley is very large, the capacity of generation and supply electric equipment can not be taken full advantage of, move uneconomical.The many electrical networks of China are at load during the peak, often power cuts to limit consumption; When load valley, then waste seriously, cause the hydroelectric power plant to abandon in a large number water, the long-time underrun of thermal power plant.Ammeter need to be checked to every household by electric company when carrying out electric quantity acquisition, the waste of manpower resource when subscriber arrearage, also needs manually to cut off the power supply to user family.

Summary of the invention

The purpose of this utility model is to overcome the weak point that exists in the above-mentioned technology, a kind of compact conformation, reasonable in design is provided, can record respectively power consumption by the electric load peak and low valley time, in order to collect the electricity charge by different prices, encourage the user initiatively to take the measure of avoiding apex filling vale, be beneficial to supply and demand electricity both sides.When electric company gathers electric weight, only need to use computing machine to gather electric weight by power line carrier, when the user remains electricity charge deficiency, can issue alarm command by computing machine, the prompting user power purchase, when user's owing electricity charges, can send and long-rangely break, send electricity order to break, send the electricity operation to the user.As the user user that attaches most importance to, should not implement outage, can issue and protect the electricity order, the user is in the single-phase charge-controlled intelligent electric meter that the arrearage state also can continue electricity consumption.In order to achieve the above object, the technical solution adopted in the utility model is: comprise housing and be arranged on housing interior microprocessor and electric energy metrical unit, described microprocessor is by interface microcontroller circuit and electric energy metrical unit, control relay circuit, data storage circuitry, carrier communication circuit, the RS485 telecommunication circuit, the infrared communication circuit, the LCD display unit, clock circuit connects, also be provided with the aobvious button of wheel and programming button on the microprocessor, and power supply monitoring circuit, house dog and ESAM module, described electric energy metrical unit mainly contains current sampling circuit, voltage sampling circuit and computation chip consist of, current sampling circuit, access microprocessor after voltage sampling circuit is connected with computation chip respectively, described control relay circuit is used for realizing logical, outage, mainly contain magnetic latching relay and some triodes and electric capacity, resistance consists of, described carrier communication circuit, RS485 telecommunication circuit and infrared communication circuit consist of the communication unit in the electric energy meter, they set up the bi-directional exchanges of information passage with microprocessor, the powered battery of described clock circuit by being attached thereto, clock circuit built-in temperature compensating module.The utility model has the advantages that: compact conformation, reasonable in design, advanced electric energy computation chip and intelligent encryption technology have been adopted, combine carrier wave, infrared, RS485 communication mode, both satisfied single-phase user's normal electricity consumption, strengthened again the ladder of management of power supply department, be a novel single-phase electric energy meter with multifunctional meaning, have in the world at present the top standard.

Description of drawings

Fig. 1 is the utility model theory diagram; Fig. 2 is electric energy metrical element circuit figure; Fig. 3 is control relay circuit figure; Fig. 4 is carrier communication circuit figure; Fig. 5 is RS485 telecommunication circuit figure; Fig. 6 is the infrared communication circuit diagram; Fig. 7 is the interface microcontroller circuit diagram.

Embodiment

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.By Fig. 1-Fig. 7 as can be known, the utility model comprises housing and is arranged on housing interior microprocessor 1 and electric energy metrical unit 2, described microprocessor 1 is by interface microcontroller circuit 16 and electric energy metrical unit 2, control relay circuit 3, data storage circuitry 4, carrier communication circuit 5, RS485 telecommunication circuit 6, infrared communication circuit 7, LCD display unit 10, clock circuit 12 connects, also be provided with the aobvious button 8 of wheel and programming button 9 on the microprocessor 1, and power supply monitoring circuit 13, house dog 14 and ESAM module 15, described electric energy metrical unit 2 mainly contains current sampling circuit, voltage sampling circuit and computation chip consist of, current sampling circuit, access microprocessor 1 after voltage sampling circuit is connected with computation chip respectively, described control relay circuit 3 is used for realizing logical, outage, mainly contain magnetic latching relay and some triodes and electric capacity, resistance consists of, described carrier communication circuit 5, the communication unit that RS485 telecommunication circuit 6 and infrared communication circuit 7 consist of in the electric energy meter, they set up the bi-directional exchanges of information passage with microprocessor 1, battery 11 power supplies of described clock circuit 12 by being attached thereto, clock circuit 12 built-in temperature compensating modules.Current sampling signal is through single resistance access computation chip in the described electric energy metrical unit 2, and voltage sampling signal is through resistor network access computation chip.The computation chip model of described electric energy metrical unit 2 is RN8209.The utility model comprises housing and is arranged on housing interior microprocessor 1 and electric energy metrical unit 2, microprocessor 1 is connected with electric energy metrical unit 2, control relay circuit 3, data storage circuitry (4), carrier communication circuit 5, RS485 telecommunication circuit 6, infrared communication circuit 7, LCD display unit 10, clock circuit 12 by interface microcontroller circuit 16, also be provided with the aobvious button 8 of wheel and programming button 9 on the microprocessor 1, and power supply monitoring circuit 13, house dog 14 and ESAM module 15; Electric energy metrical unit 2 mainly contains current sampling circuit, voltage sampling circuit and computation chip and consists of, access microprocessor 1 after current sampling circuit, voltage sampling circuit are connected with computation chip respectively; Current sampling signal is through single resistance access computation chip, and voltage sampling signal is through resistor network access computation chip, and the computation chip model is RN8209.As shown in Figure 2, the current sampling signal sampling is through resistance (R2 in the electric energy meter, R5) enter 4,5 pin of the special metering IC U7, voltage sampling signal enters 8,9 pin of U7 through resistor network, the special metering IC is converted into digital pulse signal with electric power signal after electric current, voltage signal are carried out integration.Electrical energy impulse signals counts electrical energy pulse in the different electric energy rate counters with current rate according to the current time during program design by the 27th pin of resistance R 27 access microprocessors 1.The utility model control relay circuit 3 is used for realizing the switching electricity, mainly contains magnetic latching relay and some triodes and electric capacity, resistance formation; As shown in Figure 3, the electric energy meter trip signal makes triode Q5 base stage high level state through R63, at this moment the collector and emitter conducting of Q5, the base stage low level of while Q3, the emitter and collector conducting of Q3, at this moment, coil two ends at REALAY form voltage difference, the magnetic latching relay tripping operation.The electric energy meter switching signal makes triode Q4 base stage be in high level state through R62, the at this moment collector and emitter conducting of Q4, the base stage of Q2 is in low level simultaneously, the emitter and collector conducting of Q2, at this moment, form reverse voltage at the coil two ends of REALAY poor, magnetic latching relay closes a floodgate.Realize thus electricity consumption user switching electricity.The communication unit that carrier communication circuit 5, RS485 telecommunication circuit 6 and infrared communication circuit 7 consist of in the electric energy meter, they set up the bi-directional exchanges of information passage with microprocessor 1; Battery 11 power supplies of clock circuit 12 by being attached thereto, clock circuit 12 built-in temperature compensating modules.Below in conjunction with Fig. 1-Fig. 7 its principle of work is described: single-phase charge-controlled intelligent electric meter of the present utility model substitutes original single-phase common single charge rate electric energy meter, be installed among the single-phase electricity consumption user, each rate electric flux of point Pinggu, record peak in the total electric energy of record, in the situation that pointing out, the demand charge deficiency pays dues, in the situation that subscriber arrearage can brownout, and can reach data concentrator by low-voltage powerline carrier communication, master station is copied back data by GPRS from concentrator.Main website can be according to load variations situation analysis user's load and electricity consumption situation, and while Jiang Tai district integral point freezes electric quantity data to be copied back, analyzes running status and the loss of whole circuit.During electric energy meter work, voltage, electric current are after electric current, the voltage sample circuit of electric energy metrical unit 2 are taken a sample respectively, process special IC after multiplying by electric energy, delivering to microprocessor 1 processes, the data storage that microprocessor 1 will be processed, deliver to as required display part, the Department of Communication Force output device that grades, microprocessor 1 is reminding user power purchase or break, send the electricity operation to the user as required.But the utility model practical function: 1, function of measuring has forward active energy, reverse active energy function of measuring, can store its data, and it is meritorious that combination can be set accordingly.Have the time-sharing measurement function, active energy by the corresponding period add up respectively, store total, point, peak, put down, the paddy electric flux.Store total electric energy and each rate electric flux of 12 months; Data storage boundary be the 24 o'clock the end of month constantly, or in integral point moment in No. 1 to No. 28 per month.2, the electricity charge of expense control function are calculated and are finished in long-range electricity-selling system, do not store in the table, demonstration and the electricity charge, electricity price relevant information.Electric energy meter receiving remote electricity-selling system issues operates a switch, allows to close a floodgate, during the instruction of ESAM data reading system, need by strict password authentification and safety certification.In the situation that guarantee safety, can arrange the power consumption parameter in the electric energy meter by virtual medium.3, safety certification encryption function electric energy meter adopts the ESAM module to carry out safety certification, and the cryptographic algorithm of ESAM module adopts the close algorithm of SM1 state.ESAM is embedded in the equipment, realizes the safety control functions such as safe storage, data enciphering/deciphering, bidirectional identity authentication, Access control, link encryption transmission.4, the generation of logout permanent recording electric energy meter zero clearing event constantly and the electric energy data during zero clearing.Record programming total degree, the Data Identification of the moment of nearest 10 programmings, operator's code, programming item.Total degree during the record school (when not comprising the broadcasting school), the moment during nearest 10 schools, operator's code.The total degree of record power down, the moment that nearest 10 power down occur and finish.Record nearest 10 Long-distance Control and operate a switch and nearest 10 Long-distance Control combined floodgate events, record draws, the data such as the moment and electric flux occur the combined floodgate event.Record game clock lid total degree, generation, the finish time of nearest 10 game clock lid event.5, rate, period scheme have two cover tariff period tables, can automatically change in the moment of agreement; Every cover rate is supported 4 rates.Have calendar, clock, 2 cover time zones can be set, in 24h, can programme arbitrarily 8 periods; The minimum interval of period is 15min; Period can cross over reset.Support by infrared, RS485 communication interface revise rate scale, the time segment table, and the safety practice that prevents that unauthorized people from operating should be arranged.6, warning function is when breaking down, and LCD rests on this code or alarm immediately, and backlight continues to light; When electric energy meter breaks down, show the information code (representing with Err-XX) of makeing mistakes.7, freezing function regularly freezes: electric energy data is freezed at time and interval according to agreement; Each amount of freezing is preserved 60 times.Instantaneous freezing: under abnormal condition, freeze the data of current calendar, time, all electric fluxs and important measuring amount; The instantaneous amount of freezing is preserved last 3 times data.Agreement is freezed: think in the old and new two cover rates/periods conversion, step price conversion or Utilities Electric Co. and freeze to change electric flux and other significant datas constantly when special requirement is arranged, preserve last 2 freezing data.Day freezes: store electric flux constantly at zero point every day, can store 62 days data.Integral point freezes: the storage integral point moment or the least bit meritorious total electric energy constantly, can store 254 data.The Data Identification that freezes content and correspondence meets DL/T 645-2007 and the documentation requirements of putting on record thereof.8, clocking capability adopts the built in hardware clock circuit with temperature compensation function, has calendar, timing, leap year auto-conversion function; Internal clocking terminal output frequency is 1Hz.In-25～+ 60 ℃ of temperature ranges, the clock accuracy≤± 1s/d; Under reference temperature (23 ℃), the clock accuracy≤± 0.5s/d.Scope must not be greater than 5min during the acceptable broadcasting of electric energy meter school; Key and the signcode of need not to programme during the broadcasting school cooperates; Only allow check and correction every day once.

Claims (3)

1. single-phase charge-controlled intelligent electric meter, comprise housing and be arranged on housing interior microprocessor (1) and electric energy metrical unit (2), it is characterized in that: described microprocessor (1) is by interface microcontroller circuit (16) and electric energy metrical unit (2), control relay circuit (3), data storage circuitry (4), carrier communication circuit (5), RS485 telecommunication circuit (6), infrared communication circuit (7), LCD display unit (10), clock circuit (12) connects, also be provided with the aobvious button (8) of wheel and programming button (9) on the microprocessor (1), and power supply monitoring circuit (13), house dog (14) and ESAM module (15), described electric energy metrical unit (2) mainly contains current sampling circuit, voltage sampling circuit and computation chip consist of, current sampling circuit, access microprocessor (1) after voltage sampling circuit is connected with computation chip respectively, described control relay circuit (3) is used for realizing logical, outage, mainly contain magnetic latching relay and some triodes and electric capacity, resistance consists of, described carrier communication circuit (5), RS485 telecommunication circuit (6) and infrared communication circuit (7) consist of the communication unit in the electric energy meter, their same microprocessors (1) are set up the bi-directional exchanges of information passage, battery (11) power supply of described clock circuit (12) by being attached thereto, clock circuit (12) built-in temperature compensating module.

2. single-phase charge-controlled intelligent electric meter according to claim 1 is characterized in that: the single resistance access of current sampling signal process computation chip in the described electric energy metrical unit (2), voltage sampling signal process resistor network access computation chip.

3. single-phase charge-controlled intelligent electric meter according to claim 1, it is characterized in that: the computation chip model of described electric energy metrical unit (2) is RN8209.

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