CN2235123Y

CN2235123Y - Full-electronic electric card prepayment single-phase active meter

Info

Publication number: CN2235123Y
Application number: CN 95221192
Authority: CN
Inventors: 王东林
Original assignee: HENGTONG ELECTRIC ENERGY METER CO ZHUHAI ECONOMIC ZONE
Current assignee: HENGTONG ELECTRIC ENERGY METER CO ZHUHAI ECONOMIC ZONE
Priority date: 1995-08-08
Filing date: 1995-08-08
Publication date: 1996-09-11
Anticipated expiration: 2005-08-08
Also published as: MY115827A

Abstract

The utility model belongs to the technical field of the electric energy metering and is suitable for the occasion of the energy consumption and the commercial power charging. The utility model is composed of an electric card and an electric energy meter, wherein, the electric card is inserted into a slot of the electric energy meter. The circuit of the utility model is composed of a sample circuit, an ammeter circuit, an isolating circuit of photoelectricity, a single chip microcomputer, a circuit for data storage, an electric card interface, an LED nixie tube, a display circuit, a control circuit with a pulled switch, and a power circuit. The utility model has the functions for accounting and displaying of the energy consumption, and the display functions of the power interference and the electric larceny. When the dump energy is zero, the utility model has the function for cutting the user circuit of the energy consumption, the function for checking the power source, etc. The utility model has the advantages of small power consumption, effort and time saving for charging, etc.

Description

The single-phase active electric energy meter of full electronic electricity card pre-payment

The utility model relates to the single-phase active electric energy meter of a kind of full electronic electricity card pre-payment, belongs to the electric energy metrical field.Be applicable to the occasion of civil power charging electricity consumption.

The metering mechanism of present civilian electricity remains traditional induction meter, basically be that Every household has an ammeter, power supply department need regularly look meter and charge, so both time-consuming, require great effort again, and electric energy loss is big, precision is low, from the eighties, has developed some prepayment meters, the employing light-card is arranged, magnetic card and Electrical key are as the prepayment meter of information carrier, the collection of electric power signal has adopts two kinds in general modulus conversion chip and special-purpose electrical equipment, and it is liquid crystal and mechanical register that output shows, but because domestic, outer functional requirement and electrical network situation difference, the price level difference, be unsuitable for domestic use, in recent years, domestic research to this respect rests on the mode that induction type pulse electric energy table and electronics register are used more, there is the cost height, repacking is difficult, and what have develops the pre-payment electronic electric energy meter, but big because of power consumption eventually, the cost height, reliability and stability are lower, hindered promoting the use of of product.

In order to overcome above-mentioned defective and deficiency, the utility model provides a kind of reliability, good stability, and power consumption is little, the single-phase active electric energy meter of lower-cost full electronic electricity card pre-payment.

Task of the present utility model is achieved in that the employing large scale integrated circuit, and electricity card and common solid electronic electric energy meter are organically combined.Each user is equipped with an electricity card, adopts the memory-type general purpose I C card of the built-in EEPROM identical with credit card-sized.The user arrives first the power supply department payment and purchases, power supply department deposits information about power in the electricity card in, this electricity card is inserted electric energy meter, electric energy meter reads in electric weight, and the electric quantity data in the removing electricity card, real-time detection computations user's power consumption, and deduct in the dump energy from electric energy meter in real time, when dump energy is zero, the feed circuit of disconnect user.

Circuit of the present utility model is by sample circuit, meter circuit, photoelectric isolating circuit U ₂, U ₃, U ₄, single-chip microcomputer, data storage circuitry, electric card, LED charactron display circuit, operate a switch control circuit and power circuit are formed.

The power supply of sample circuit is the 220V/50HZ civil power, B, C end by the copper-manganese sheet in the circuit carries out current sampling, A end by the copper-manganese sheet carries out voltage sampling, sampling current and voltage input meter circuit, in special circuit,, behind V/F Voltage-to-frequency Converter and the logic frequency division, export the negative pulse electric power signal by multiplier, its frequency is 1/1600KWH, through current-limiting resistance and photoelectric isolating circuit U ₃Link to each other with single chip microcomputer; Plug-in card detection, clock, power supply, the data of electricity card are gone into the machine end and are linked to each other with microcomputer, and single chip microcomputer is through processing such as data processing and accumulative totals, and the accumulative total that obtains the user is purchased power consumption and dump energy, it is exported in the storer store; Delivering to LED charactron display circuit shows; When stealing was arranged, the electric current that flows through the copper-manganese sheet was anti-phase, and negative pulse of meter circuit output makes the bright expression of light emitting diode that people's stealing be arranged through current-limiting resistance, when dump energy is zero, low level of single chip microcomputer output is given the control circuit of operating a switch, and makes the triode conducting, photoelectric isolating circuit U ₄Output low level, the relay J adhesive, the contact disconnects, to user's outage, when the user purchases the IC-card insertion ammeter electricity card socket of electricity again, single chip microcomputer output high level, the control circuit of operating a switch discharges relay, and ammeter restores electricity to the user.

Relay need ± 6V the power supply of the utility model circuit, other circuit need+5V power supply, provide by power circuit, civil power 220V/50HZ sends into the transformer input end after filtering, one time utmost point output behind rectifying and wave-filtering+the 5V power supply, another secondary and the 3rd secondaryly after rectification, filtering, get+6V and-the 6V power supply.

Fig. 1 is a contour structures synoptic diagram of the present utility model.

Fig. 2 is a circuit block diagram of the present utility model.

Fig. 3 is embodiment circuit theory diagrams of the utility model (not containing power circuit).

Fig. 4 is an embodiment power circuit principle of the utility model figure.

In conjunction with the accompanying drawings the utility model and embodiment are described as follows:

As shown in Figure 1: the utility model is made up of electricity card and electric energy meter, electricity card 3 inserts in the electric card slot 4 of electric energy meter, and the top of electric energy meter shell 1 is provided with group of four figures pipe 2, and all circuit is installed on the circuit board, circuit board is fixed in the electric energy meter shell 1, L ₁With L ₂The civil power that gets access to grid, L ₃With L ₄Connect user load.

As shown in Figure 2, circuit of the present utility model is by sample circuit 5, meter circuit U ₁, photoelectric isolating circuit U ₂, U ₃, U ₄, single chip microcomputer U ₅, data storage circuitry U ₆, electric card K, LED charactron display circuit 6, operate a switch control circuit 7 and power circuit 8 are formed.

As shown in Figure 3:

The power supply of sample circuit is the 220V alternating current, and copper-manganese sheet B, C in the sample circuit hold through resistance R ₁, R ₂Respectively with meter circuit U ₁1,2 pin be connected, carry out current sampling, A holds through resistance R ₃With meter circuit U ₁3,4 pin be connected, carry out voltage sampling, the ammeter special circuit comprises that the CH1025 type simulates multiplier, U/F transducer and logic frequency division, meter circuit U ₁Output terminal 8 pin through current-limiting resistance R ₄With photoelectric isolating circuit U ₂1,2 pin and the zero line of light emitting diode LD11 to 220V be connected meter circuit U ₁9 pin through resistance R ₅Be connected photoelectric isolating circuit U with the zero line of LD12 to 220V ₂The pulse used for check test of one of 4,5 pin output, when 8 pin had electric power signal output, Red LED1 LD11 was bright, expression to electric energy at counting, when stealing is arranged, 9 pin output negative pulse, green light emitting diode LD12 is bright, meter circuit U ₁13,14 pin through C ₁, R ₆, R ₇With photoelectric isolating circuit U ₃Input end 1,2 pin be connected its output terminal 4,5 pin and single-chip microcomputer U ₅36 pin be connected, a frequency inputs to single-chip microcomputer U for the 1/1600KWH undersuing ₅, 26,44,2,28 pin of single-chip microcomputer are gone into the hot junction with plug-in card detection, clock, power supply, the data of electric card respectively and are connected.

27 pin of single-chip microcomputer are through R ₃₂With triode T ₂Base stage links to each other, T ₂Collector output chip selection signal and eeprom memory U ₆1 pin link to each other U ₅25 pin and U ₆The 2 pin transmit clock signal that links to each other, U ₅24 pin and U ₆3 pin link to each other to constitute series connection storage data-interface, U ₅23 pin and U ₆4 pin link to each other to constitute the sense data interface.

Single-chip microcomputer U ₅42 pin through resistance R ₁₅With triode T ₅Base stage link to each other its emitter and photoelectric isolating circuit U ₄1,2 pin link to each

other U

₄4,5 pin through resistance R ₁₂With triode T ₁Link to each other T ₁Emitter link to each other its contact J with relay J by diode _oLink to each other with subscriber's line circuit, 4-7,8-15 pin of single-chip microcomputer link to each other with position, the segment signal input end of LED charactron.

Single chip microcomputer U5 selects UPD75004 type single-chip microcomputer for use, and 43 pin of single-chip microcomputer are through C ₂, R ₂₃Differentiating circuit and 4060 type counter U ₇12 pin link to each other, output terminal 2 pin of counter are through resistance R ₂₅With triode T ₄Base stage links to each other, and emitter is through C ₃Link to each other with 20 pin of single-chip microcomputer, Vcc is through R ₂₉, R ₂₈With triode T ₃Base stage links to each other, and collector is through resistance R ₂₆The formation that links to each other with 20 pin of single-chip microcomputer power sense circuit.

The civil power of power circuit: 220V/50HZ is through wave filter 1R ₁, TR ₂, 3C _oWith transformer TR ₁Input end link to each other TR ₁One secondary through D ₁-D ₄Rectification meets 7805 type three-terminal voltage-stabilizing pipe 4U ₁And filter capacitor 4C ₁, 4C ₂, 4C ₃, 4C ₄Output+5V voltage vcc, TR ₁First is secondary through 3D ₁Rectification meets wave filter 3C ₁, 3C ₃, 3R ₁, 3R ₃, 3C ₅, 3C ₇Output+6V power supply, TR ₁The 3rd secondary through 3D ₂Rectification meets wave filter 3C ₂, 3C ₄, 3R ₂, 3R ₄, 3C ₆, 3C ₈, output-6V voltage, zener diode 3DZ ₁And 3DZ ₂Be connected to respectively+6V and 220V zero line and-6V and 220V zero line between.

Electric weight calculates: single-chip microcomputer U ₅The electric power signal of input obtains using power consumption after processing such as add up;

Data storage: during storage, be to send chip selection signal, through T by single-chip microcomputer 27 pin ₂The anti-phase storer U that sends into ₆1 pin, deposit data in U ₆In, work as U ₅From storer U ₆In the data that read, when dump energy is zero, single-chip microcomputer U ₅Low level of 42 pin output, make T ₅Conducting,

U

₄4,5 pin output low levels, make T ₁Conducting, the relay J adhesive, the contact disconnects, and promptly ammeter cuts off the power supply to the user, after purchasing electricity again, integrated circuit storage chip IC-card, when inserting ammeter electricity card IC-card deck, Push switch S ₁, the electric power signal in the electricity card is through 26 pin of IC-card seat to the CUP single-chip microcomputer, U ₅42 pin output high level, through R ₁₅, T ₅, U ₄, T ₁Relay J is discharged, and ammeter is powered to the user; LED shows: transfer to from socket when IC-card, press S ₁The time, single-chip microcomputer U ₅3 pin input low levels, 4-7 pin of single-chip microcomputer, the position of 8-15 pin and LED charactron, segment signal input end link to each other, the control charactron shows respectively totally purchases power consumption and dump energy.

Anti-power supply disturbs: when single chip microcomputer is not subjected to external interference, when working properly, its 43 pin output pulse is through C ₂, R ₂₃The differentiating circuit of forming is to counter U ₇12 pin zero clearings, counter 2 pin no pulse output, single-chip microcomputer does not reset.

As single chip microcomputer U ₅When being subjected to external interference, may occur crashing U ₅43 pin no pulse output, U ₇12 pin output low levels, U ₇2 pin output high level, pulse is through R ₂₅, T ₄Anti-phase output reset pulse is to U ₅20 pin, restart after single-chip microcomputer is resetted.

Power supply detects: when power supply has big fluctuation, and when Vcc≤3.9V, T ₃Not conducting, U ₅20 pin be low level, U ₅Be in reset mode, do not work, when Vcc＞4.5V, T ₃Conducting, U ₅20 pin be high level, CPU starts working.

Power circuit output+6V voltage with-6V voltage is to supply with relay work, power circuit output+5V voltage is other circuit working of supply of electrical energy table.

The utility model has the advantages that:

1. pre-payment is automatically calculated dump energy and accumulative total is purchased power consumption by electric energy meter, and is shown in real time, charge laborsaving, save time,

2. power consumption is little, and is fine through trial effect, and the value of promoting the use of is arranged.

Claims

1. a full electronic electricity blocks the single-phase active electric energy meter of pre-payment, it is characterized in that, this electric energy meter is made up of electricity card and electric energy meter, electricity card (3) inserts in the electric card slot (4) of electric energy meter, the top of electric energy meter shell (1) is provided with group of four figures pipe (2), all circuit is installed on the circuit board, and circuit board is fixed in the electric energy meter shell (1), L ₁With L ₂The civil power that gets access to grid, L ₃With L ₄Connect user load, the circuit of this electric energy meter is by sample circuit (5), meter circuit (U ₁), photoelectric isolating circuit (U ₂), (U ₃), (U ₄), single chip microcomputer (U ₅), data storage circuitry (U ₆), electric card (K), LED charactron display circuit (6), control circuit of operating a switch (7) and power circuit (8) are formed, and the power supply of sample circuit (5) is the 220V/50HZ alternating current, and the copper-manganese sheet (B) in the sample circuit (C) is held respectively through resistance R ₁, R ₂With meter circuit (U ₁) (1,2) pin link to each other, (A) end and 220V zero line respectively with meter circuit (U ₁) (3,4) pin link to each other; Meter circuit (U ₁) comprise CH1025 pattern quasi-multiplication device, U/F transducer and logic frequency division, meter circuit (U ₁) output terminal (8) pin through current-limiting resistance R ₄With photoelectric isolating circuit (U ₂) (1,2) pin and light emitting diode (LD11) to 220V zero line link to each other, (9) pin of meter circuit is through resistance R ₅With LD ₁₂Be connected to the 220V zero line, photoelectricity is isolated (U ₂) the pulse used for check test of one of output terminal (4,5) pin output, meter circuit (U ₁) (13,14) pin through C ₁, R ₆, R ₇With photoelectric isolating circuit (U ₃) input end (1,2) pin link to each other its output terminal (4,5) pin and single chip microcomputer (U ₅) (36) pin link to each other, a frequency inputs to single chip microcomputer (U for the 1/1600KWH undersuing ₅); Single chip microcomputer (U ₅) input end (26,44,2,28) pin go into the machine end with plug-in card detection, clock, power supply, the data of electric card (K) respectively and link to each other single chip microcomputer (U ₅) above-mentioned input signal is carried out data processing and add up to wait obtaining dump energy and add up purchasing power consumption, export it to EEP-ROM storer (U ₆) in, (27) pin of single chip microcomputer is through resistance R ₃₂With triode (T ₂) base stage links to each other (T ₂) collector output chip selection signal and eeprom memory (U ₆) (1) pin link to each other (25) pin of single-chip microcomputer and storer (U ₆) the 2 pin transmit clock signal that links to each other, (24) pin of single-chip microcomputer links to each other with storer (3) pin, and constituting connects stores data-interface, (23) pin of single-chip microcomputer and storer (U ₆) 4 pin link to each other to constitute the sense data interface, (42) pin of single-chip microcomputer is through resistance R ₁₅With triode (T ₅) base stage link to each other its emitter and photoelectric isolating circuit (U ₄) (1,2) pin link to each other photoelectric isolating circuit (U ₄) (4,5) pin through resistance R ₁₂With triode (T ₁) base stage link to each other (T ₁) emitter link to each other its contact (J with relay (J) by diode ₀) link to each other single-chip microcomputer (U with subscriber's line circuit ₅) (4-7) pin, the position of (8-15) pin and LED charactron, segment signal input end link to each other, (43) pin warp (C of single-chip microcomputer ₂, R ₂₃) differentiating circuit and counter (U ₇) (12) pin link to each other counter (U ₇) output terminal (2) pin through resistance (R ₂₅) and triode (T ₄) base stage links to each other, emitter is through (C ₃) link to each other with (20) pin of single-chip microcomputer; Voltage (Vcc) is through resistance (R ₂₉), (R ₂₈) and triode (T ₃) base stage link to each other, collector is through (R ₂₆) constitute power sense circuit with (20) pin of single-chip microcomputer; Power circuit: the 220V/50HZ civil power is through wave filter (1R ₁, TR ₂, 3C ₀) and transformer (TR ₁) input end link to each other a secondary warp (D of transformer ₁, D ₂, D ₃, D ₄) rectification meets three terminal regulator (4U ₁) and filter capacitor (4C ₁, 4C ₂, 4C ₃, 4C ₄) output+5V voltage (Vcc), the secondary warp (3D of another of transformer ₁) rectification meets wave filter (3C ₁, 3C ₃, 3R ₁, 3R ₃, 3C ₅, 3C ₇) output+6V voltage, the 3rd secondary warp (3D of transformer ₂) rectification meets wave filter (3C ₂, 3C ₄, 3R ₂, 3R ₄, 3C ₆, 3C ₈), output-6V voltage, voltage stabilizing diode (3DZ ₁) and (3DZ ₂) be connected to respectively+6V and 220V zero line, the 220V zero line and-6V between.

2. by the single-phase active electric energy meter of the described pre-payment of claim 1, it is characterized in that single chip microcomputer is selected UPD75004 type single-chip microcomputer for use.

3. by claim 1 or the single-phase active electric energy meter of 2 described pre-payments, it is characterized in that electricity card (3) is selected the memory-type general purpose I C card of the built-in EEPROM identical with credit card-sized for use.

4. by the single-phase active electric energy meter of the described pre-payment of claim 1, it is characterized in that (U ₆) select eeprom memory for use.