CN2179978Y - Multi-functional intelligent watt-hour meter - Google Patents

Abstract

The utility model belongs to a watt-hour meter for checking electricity consumption, which is suitable for the power supply control system of resident families. The utility model is composed of a signal sensing part, a shaping part, a data-processing part and an output part. The utility model has the advantages that the electricity consumption of residents can be managed scientifically, toll collectors do not need to go to each house to copy the quantity and count the fee so as to reduce the work intensity of the toll collectors, and the measurement of the electricity consumption is precise.

Description

Multi-functional intelligent watt-hour meter

The utility model belongs to the watt-hour meter of detection amount, is applicable to resident family electric power supply control system.

At present, the watt-hour meter that urban and rural households is used, the electromagnetic action of a normally inner iron core drives the rotating disk rotation and drives register work, reflects the quantity of consumed power, is calculated the electricity charge that should hand over by the toll collector.Its shortcoming is: electric industry department can not control power supply, is not easy to toll administration; Manual metering measures not only poor accuracy, and increases toll collector's labour intensity; Can't distinguish metering to line voltage peak, paddy, flat section in the use, be unfavorable for scientific management.

The purpose of this utility model is the shortcoming at above-mentioned existence, and a kind of electricity consumption accurate measurement is provided, and can alleviate toll collector's labour intensity, is convenient to the multifunctional intelligent kilowatt-hour meter of scientific management.

Technical essential of the present utility model is:

It is made of sensing part, shaping unit, data processing section and output, sensing partly comprises photoelectric sensing circuit, current sense circuit, voltage sensing circuit, electric leakage sensing circuit, shaping unit comprises filtering shaping circuit and amplification and rectification circuit, data processing section comprises microprocessor, pushbutton switch circuit and smart card, and output comprises display interface circuit, display, output interface circuit, status display circuit, photoelectricity coupling and Drive and Control Circuit, acoustics circuit.It is characterized in that the photoelectric sensing circuit that is made of luminotron DD, receiving tube NT1 etc., the filtering shaping circuit that constitutes through Resistor-Capacitor Unit and phase inverter U10:A is to the single-chip microcomputer U01 end pin 14 of microprocessor; Two-way is respectively because the current sense circuit that reed pipe GH1 and GH2 form, and is respectively the filtering shaping circuit of Resistor-Capacitor Unit, phase inverter U10:B and Resistor-Capacitor Unit, phase inverter U10:C through two-way, to 13 pin and 1 pin of the single-chip microcomputer U01 of microprocessor; Take from civil power in the voltage sensing circuit through the BB transformation, rectification, three tunnel dividing potential drops output that filtering provides, amplify 15 of single-chip microcomputer U01 that shaping send microprocessor through comparer U08,10,17 pin: the electric leakage sensing circuit that constitutes by zero sequence sensor LX and voltage amplifier U11 etc., amplify 11 pin that single-chip microcomputer U01 is sent in shaping through comparer U08: end pin P11～P12 and the P13～P17 of single-chip microcomputer U01, respectively with by the two-way Resistor-Capacitor Unit, the pushbutton switch circuit that phase inverter U10:F and U10:E constitute links to each other with smart card U13: single-chip microcomputer U01 data bus P00～P07 connects A0～A7 addressing end of storer U02 through 8D latch U03, and the P20 of single-chip microcomputer U01～P24 port connects A8～A12 addressing end of storer U02; 318 code translator U04, three output terminals that three input ends link to each other with 8D latch U03, connect the 8D latch U07 control end of 8D latch U05, U06 control end and the output interface circuit of display interface circuit respectively, data line P00～P07 of single-chip microcomputer U01 send the input end pin of latch U05, U06 and U07; The output terminal pin of 8D latch U05 and U06 is through driver U12 and resistor chain RY1 47 hop count sign indicating number tube anodes and the negative electrode to display; 8D latch U07 output terminal pin connects the LED 1～LED6 of duty indication, output connects relay J through transistor T2 photocoupler H2 input end and acoustics circuit respectively.

The utility model has the advantages that: can carry out the management of science to electricity consumption of resident, the toll collector need not alleviate toll collector's labour intensity, its electricity consumption accurate measurement to the each household charging of going to check meter.It integrates multiple safety guarantee function such as automatic charge, watt metering, earth leakage protection, overvoltage protection, overcurrent protection, and is multiple functional, stable and reliable for performance.

Description of drawings:

Fig. 1 is a circuit structure block diagram of the present utility model;

Fig. 2 is circuit theory diagrams of the present utility model;

Fig. 3 is a system software block diagram of the present utility model.

From Fig. 2 as seen, X1, the X2 end pin with single-chip microcomputer U01 is connected to the clock circuit that is made of capacitor C 04, C05 and crystal oscillator CRY; The RESET end of single-chip microcomputer U01 connects by phase inverter U10:D, capacitor C 011, the electrify restoration circuit that diode D09, resistance R 027 constitute; Diode D06, D07, D08 and rechargeable battery E1 constitute battery feed circuit, and its Vcc is connected to 40 pin of U01; Resistance R 022～R026, stabilivolt Z1 and comparer U09:A constitute the power-fail detection circuit of U01, and 2 pin of U09:A are connected to 12 pin of U01.With 8D latch U07 output terminal pin 19(Q7 end) acoustics circuit that links to each other, constitute by resistance R 036, transistor T and hummer FM.

Principle of work is:

The pulse signal of watt-hour meter is produced by photoelectric sensing circuit, its receiving tube NT1 emitter-base bandgap grading output signal is through R09, C01, C10:A filter shape, 14 pin that U01 is delivered in the output of U10:A the 2nd pin detect: the overcurrent transducing signal is owing to reed pipe GH1 produces on resistance R H1 the induction by current of alternating current 220V end load consumption, signal is through R010, C02 and schmitt trigger U10:B filter shape, 13 pin that U10:B the 4th pin exports U01 to detect, and low level is effective.The overload current sensing signal is owing to reed pipe GH2 produces on resistance R H2 the induction by current of alternating current 220V end load consumption, signal is through R011, C03 and schmitt trigger U10:C filter shape, the output of U10:C the 6th pin is detected by the 1st pin of U01, and low level is effective.The generation of overvoltage, voltage peak and voltage paddy signal, all A point voltage dividing potential drop is realized, and the A point voltage is the DC voltage that produces after transformer BB, diode D01～D04 rectification and capacitor CC filtering, overvoltage is produced A point voltage dividing potential drop by R01, R02, deliver to U08 the 4th pin through R012, relatively amplify with the 5th pin reference voltage of U08, reference voltage is produced by R22 and Z2, voltage is 3.5V, when being higher than 3.5V, then U08 the 2nd pin output low level is detected by 15 pin of U01, and low level is effective.Voltage peak testing process is the same, and signal is produced by R03, R04, and the 6th pin and the 7 pin 3.5V reference voltages of delivering to U08 relatively amplify, and the 1st pin output of U08 is detected by 10 pin of U01, and low level is effective.Voltage paddy signal R05, R06 produce the 8th pin of delivering to U08, relatively amplify with 9 pin 3.5V reference voltages, and the 14th pin output of U08, effective by the 17 pin detection high level of U01.Electric leakage signal is produced by zero-sequence transformer, signal amplifies through the U11 circuit, by D05, R021 and C010 circuit the AC signal that U11 amplifies is become direct current signal, the 10th pin and the 11st pin reference voltage of delivering to U08 compare, and the 12nd pin output of U08 is effective by the 11 pin detection low level of U01.Eight bit address A0～A7 by U01P00～P07 termination output are latched by U03, output is held by P2.0～P2.7 in the high address of U01, the address is sent the back and output control command (8 bit data) under 16 pin (WR) signal controlling of U01 by P00～P07 termination, and the output of 13 pin of U04 effectively.Control command is latched among the U07, export control signal by Q0～Q7, the Q0 of U07～LED1～the LED6 high level is effective for Q5 end state of a control indicator, the Q6 end of U07 drives triode T2 pilot relay J action by photo-coupler H2, alerting signal is by the Q7 end output of U07, FM sends alerting signal by triode T1 control hummer, and low level is effective.The position control signal of four charactron LED03～LED00 is latched by U05, the same U07 of the process that latchs, by U12 difference driving LED 03～LED00, digital pipeline section display control signal is latched by U06, the same U07 of the process that latchs is by the field of current-limiting resistance RY1 driving charactron.U02 is used for storage system program and numerical table.U04 is U05, U06, U07 address decoder.Power-on reset signal is produced by R027, C011, through the shaping of U10:D schmitt trigger, the 8th pin outputs to the RESET end of U01, high level is effective, the detection of power loss signal is by R022, R023 dividing potential drop, and the reference voltage with R024, Z1 formation compares again, by the 2 pin output generation of U09:A, produce power-off signal when chip power supply voltage is lower than 4.5V, low level is effective.When pushbutton switch AN1 and AN2 pressed, U10:F the 12nd pin and U10:E the 10th pin were all exported high level, by the 2nd pin and the detection of the 3rd pin of U01.U13 adopts GPM416, and its read-write operation meets the GPM416-5V of GEMPLUS company product standard.

When this product used, the user held (by the power supply department granting) to power supply department purchase electric weight, and the smart card (GPM416) that will deposit electric weight in inserts in the ammeter.Ammeter is at first discerned processing to smart card, if password correct (and having electric weight on the smart card) is then connected power supply, and the beginning operate as normal; If password bad (not being the smart card of this power supply department distribution) is then cut off the electricity supply, stop power supply, and send sound and light alarm, the smart card that reminding user to replace is correct to the user.In operational process, ammeter shows peak, paddy, the level state of current line voltage at any time, the economic electricity consumption of prompting user.Because of the tripping operation outage that abnormal conditions such as electric leakage, overcurrent and long-time overload electricity consumption cause, after abnormal conditions were eliminated, if will recover electricity consumption, the user only need click reset button (AN2) and get final product; And the tripping operation that causes because of overvoltage outage, when line voltage recover normal after, ammeter can be connected power supply automatically.In the true(-)running process, the user can click the Show Button (AN1), checks current dump energy at any time.

Claims (1)

1, a kind of multifunction watt-hour meter with intelligence card is characterized in that the photoelectric sensing circuit that is made of luminotron DD, receiving tube NT1, and the filtering shaping circuit that constitutes through Resistor-Capacitor Unit and phase inverter U10: A is to the single-chip microcomputer U01 end pin 14 of microprocessor; Two-way is respectively because the current sense circuit that reed pipe GH1 and GH2 form, and is respectively the filtering shaping circuit of Resistor-Capacitor Unit, phase inverter U10: B and Resistor-Capacitor Unit, phase inverter U10: C through two-way, to 13 pin and 1 pin of the single-chip microcomputer U01 of microprocessor; Take from civil power in the voltage sensing circuit through three tunnel dividing potential drops output that BB transformation, rectification, filtering provide, amplify 15,10,17 pin that the single-chip microcomputer U01 of microprocessor is sent in shaping through comparer U08; Electric leakage sensing circuit by zero sequence sensor LX and voltage amplifier U11 etc. constitutes amplifies 11 pin that single-chip microcomputer U01 is sent in shaping through comparer U08; End pin P11～P12 and the P13～P17 of single-chip microcomputer U01 link to each other with smart card U13 with the pushbutton switch circuit that is made of two-way Resistor-Capacitor Unit, phase inverter U10: F and U10: E respectively; Single-chip microcomputer U01 data bus P00～P07 connects A0～A7 addressing end of storer U02 through 8D latch U03, and the P20 of single-chip microcomputer U01～P24 port connects A8～A12 addressing end of storer U02; 318 code translator U04, three output terminals that three input ends link to each other with 8D latch U03, connect the 8D latch U07 control end of 8D latch U05, U06 control end and the output interface circuit of display interface circuit respectively, data line P00～P07 of single-chip microcomputer U01 send the input end pin of latch U05, U06 and U07; The output terminal pin of 8D latch U05 and U06 is through driver U12 and resistor chain RY1 47 hop count sign indicating number tube anodes and the negative electrode to display; 8D latch U07 output terminal pin connects the LED 1～LED6 of duty indication, output connects relay J through transistor T2 photocoupler H2 input end and acoustics circuit respectively.

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