CN202083764U

CN202083764U - Wireless electric detecting module

Info

Publication number: CN202083764U
Application number: CN2011202000099U
Authority: CN
Inventors: 蒋正坤
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-06-15
Filing date: 2011-06-15
Publication date: 2011-12-21
Anticipated expiration: 2021-06-15

Abstract

The utility model relates to a detecting module, particularly to a wireless electric detecting module comprising a leakage current detecting circuit, a one-chip microcomputer control circuit, an alarm circuit, a display circuit, and a frequency selective amplifier circuit, wherein the signals, collected by the leakage current detecting circuit, are transmitted to an A\D data converting circuit via a signal amplification circuit; the output signals of the A\D data converting circuit are output to the alarm circuit, the display circuit, and a phase lock circuit via the control of the one-chip microcomputer control circuit; and the output signals of the phase lock circuit are transmitted to a carrier signal decoding circuit via the frequency selective amplifier circuit. When a power supply line or a device undergoes electric leakage, the signals collected by an electric leakage current sensor, via the control of the one-chip microcomputer, drive an LCD to display the leakage current and an alarm is made to the host via carrier signals, thereby saving the cost, realizing wireless intellectualized control and modularized design, and being able to meet the demand of different breakers.

Description

Wireless electric detection module

Technical field

The utility model relates to a kind of detection module, particularly be a kind of wireless electric detection module.

Background technology

The residual current circuit breaker of Xiao Shouing all is the integral type product in the market, when the consumer when choosing, can not arbitrary combination, and its function singleness, wiring is difficult, cost is high, do not have the function of radio alarming and modular design, can't satisfy the different demands in market.

The utility model content

The purpose of this utility model is to overcome above-mentioned deficiency, and a kind of wireless electric detection module is provided.

The technical scheme that its technical matters that solves the utility model adopts is: wireless electric detection module, comprise leakage current testing circuit, single chip machine controlling circuit, warning circuit, display circuit and frequency-selecting amplifier circuit, the signal of described leakage current testing circuit collection through signal amplification circuit send to A the D data converting circuit, A the output signal of D data converting circuit export warning circuit, display circuit and phase lock circuitry to through single chip machine controlling circuit control, the output signal of described phase lock circuitry sends to the carrier signal decoding scheme through the frequency-selecting amplifier circuit.

The leakage current sensor LN acquired signal that described leakage current testing circuit is passed simultaneously by three-phase firewire and zero line.

Described signal amplification circuit adopts AD623 operational amplifier U3.

Described phase lock circuitry is made of LM567 tone decoder U1 and peripheral electric capacity 2C1, resistance 2R1, resistance 2R2 thereof.

Described frequency-selecting amplifier circuit is made of elementary L1, electric capacity 2C2, the capacitor 2C3 of triode VT1, audio-frequency transformer (AFT) T, and sends data-signal through telephone wire to the carrier signal decoding scheme by secondary L2, the electric capacity 2C4 of audio-frequency transformer (AFT) T.

Described carrier signal decoding scheme is made of the audio-frequency transformer (AFT) T1, LM567 ATD U2, triode VT2 and the LED that connect successively.

By adopting above-mentioned technical scheme, the beneficial effects of the utility model are: when supply line or equipment appearance electric leakage, the signal of leakage current sensor acquisition drives the current leakage current of LCD liquid crystal display displays through Single-chip Controlling, and report to the police to main frame by carrier signal, save cost, realize wireless intelligent control, modular design, adapt to the demand of different isolating switchs.

Description of drawings

Fig. 1 is a frame assumption diagram of the present utility model;

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

Embodiment

As Fig. 1, shown in Figure 2, wireless electric detection module of the present utility model, comprise leakage current testing circuit 1, single chip machine controlling circuit 2, warning circuit 3, display circuit 5 and frequency-selecting amplifier circuit 7, the signal that described leakage current testing circuit 1 is gathered through signal amplification circuit 11 send to A D data converting circuit 12, A the output signal of D data converting circuit 12 export warning circuit 3 to through single chip machine controlling circuit 2 control, display circuit 5 and phase lock circuitry 6, the output signal of described phase lock circuitry 6 sends to carrier signal decoding scheme 8 through frequency-selecting amplifier circuit 7.

The leakage current sensor LN acquired signal that described leakage current testing circuit 1 is passed simultaneously by three-phase firewire and zero line, when three-phase firewire has earth fault mutually, LN time level produces induction weak voltage signal, this signal is input to the 2nd pin of AD623 operational amplifier U3, after AD623 operational amplifier U3 internal arithmetic is amplified, through diode D1 rectification, be input to after capacitor C 2 filtering A the 2nd pin of D data converter IC2, through A D data converter IC2 the 5th, 6, the 22nd of 7 pin and single-chip microcomputer IC1,32,34 pin are formed voltage data transition of communications circuit, through single-chip microcomputer IC1 read A the current data information of D data converter IC2, when the live wire earth leakage current big more, the 1st pin current potential of AD623 operational amplifier U3 is also just high more, judge that through single-chip microcomputer IC1 internal processes surpassing the electric leakage setting value time-divisions three tunnel exports, the first via is by the 37th pin output high level of single-chip microcomputer IC1, through resistance R 6 current limlitings, make triode Q1 conducting, loudspeaker BDD sends the alarm sound of " ticking ... ", and leak current fault appears in cue circuit; The second tunnel output is formed the indicated data communication circuit by the 3rd, 4,5,6 pin of LCD LCD IC3 and the 12nd, 7,8,27 pin of single-chip microcomputer IC1, send driving data video data information by single-chip microcomputer IC1 to LCD LCD IC2, IC2 shows current leakage current value by the LCD LCD; Third Road output is formed phase lock circuitry 6 by LM567 tone decoder U1 and peripheral electric capacity 2C1, resistance 2R1 thereof, the multivibrator that resistance 2R2 constitutes, its oscillation frequency is by the parameter decision of electric capacity 2C1, resistance 2R1, and carrier frequency is adjusted in the 150-300KHZ scope.Elementary L1, electric capacity 2C2, capacitor 2C3 by triode VT1, audio-frequency transformer (AFT) T constitute frequency-selecting amplifier circuit 7, the 25th pin output high level signal by single-chip microcomputer IC1, make LM567 tone decoder U1 obtain working power, LM567 tone decoder U1 starts working, be coupled on local telephone network speaking wire or the AC network AC220V power lead and send by secondary L2, the electric capacity 2C4 of audio-frequency transformer (AFT) T, send data-signal to the carrier wave main frame.

Described carrier signal decoding scheme 8 is made of the audio-frequency transformer (AFT) T1, LM567 ATD U2, triode VT2, the LED that connect successively, the time constant of resistance 1R1, electric capacity 1C5 network has determined the voltage controlled oscillator of LM567 ATD U2, when the carrier wave extension set when main frame sends 150-300KHZ carrier wave command signal, be coupled to the secondary L3 of audio-frequency transformer (AFT) T through electric capacity 1C1, audio-frequency transformer (AFT) T1, its secondary L3, electric capacity 1C2, electric capacity 1C3 form a carrier wave frequency selection network.Signal after the frequency-selecting is coupled to the 3rd pin signal input part of LM567 ATD U2 through electric capacity 1C4, after LM567 ATD U2 decoding, by its 8th pin output terminal output low level, make triode VT2 conducting, LED is lighted, the carrier data signal of receiving extension set is described, illustrates leak current fault takes place, should in time get rid of.

Above-described only is a preferred embodiment of the present utility model, can not limit the scope that this practicality is implemented, and every equalization of being done according to the utility model claim changes and decorates, and all should still belong in the scope that the utility model contains.

Claims

1. wireless electric detection module, it is characterized in that: comprise leakage current testing circuit (1), single chip machine controlling circuit (2), warning circuit (3), display circuit (5) and frequency-selecting amplifier circuit (7), the signal that described leakage current testing circuit (1) is gathered through signal amplification circuit (11) send to A D data converting circuit (12), A the output signal of D data converting circuit (12) export warning circuit (3) to through single chip machine controlling circuit (2) control, display circuit (5) and phase lock circuitry (6), the output signal of described phase lock circuitry (6) sends to carrier signal decoding scheme (8) through frequency-selecting amplifier circuit (7).

2. wireless electric detection module according to claim 1 is characterized in that: the leakage current sensor LN acquired signal that described leakage current testing circuit (1) is passed simultaneously by three-phase firewire and zero line.

3. wireless electric detection module according to claim 1 is characterized in that: described signal amplification circuit (11) adopts AD623 operational amplifier U3.

4. wireless electric detection module according to claim 1 is characterized in that: described phase lock circuitry (6) is made of LM567 tone decoder U1 and peripheral electric capacity 2C1, resistance 2R1, resistance 2R2 thereof.

5. wireless electric detection module according to claim 1, it is characterized in that: described frequency-selecting amplifier circuit (7) is made of elementary L1, electric capacity 2C2, the capacitor 2C3 of triode VT1, audio-frequency transformer (AFT) T, and sends data-signal through telephone wire to carrier signal decoding scheme (8) by secondary L2, the electric capacity 2C4 of audio-frequency transformer (AFT) T.

6. wireless according to claim 1 or 5 electric detection module is characterized in that: described carrier signal decoding scheme (8) is made of the audio-frequency transformer (AFT) T1, LM567 ATD U2, triode VT2 and the LED that connect successively.