CN202171856U

CN202171856U - Multiloop fire detection device

Info

Publication number: CN202171856U
Application number: CN2011202606501U
Authority: CN
Inventors: 傅志海
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-07-22
Filing date: 2011-07-22
Publication date: 2012-03-21
Anticipated expiration: 2021-07-22

Abstract

The utility model relates to a detection device, particularly to a multiloop fire detection device. The multiloop fire detection device comprises multiple residual current transformer detection circuits, a fire-fighting linkage trigger circuit, a one-chip microcomputer control circuit, a display circuit, a power off drive circuit and a carrier signal phase lock circuit, wherein signals acquired by the residual current transformer detection circuits are sent to an A/D data transition circuit, output signals of the A/D data transition circuit are outputted to the display circuit, the power off drive circuit and the carrier signal phase lock circuit via control of the one-chip microcomputer control circuit, output signals of the carrier signal phase lock circuit are sent to a carrier signal decoding circuit via a frequency selecting amplifier circuit, and the fire-fighting linkage trigger circuit outputs to the power off drive circuit via control of the one-chip microcomputer control circuit. The device can acquire multipath electric leakage signals for detection and combines functions of monitoring, display and alarm. By alarming in a wireless manner via carrier signals, the device effectively reduces cost and is high in compatibility.

Description

A kind of multiloop fire detection device

Technical field

The utility model relates to a kind of pick-up unit, particularly be a kind of multiloop fire detection device.

Background technology

At present, exist the hidden danger of fire always and be accompanied by the generation of disaster in industry and the folk power supply system, it is threatening human safety of life and property constantly, becomes one of major disaster that influences human ordinary production and existence thus.Along with progress of science and technology and growth in the living standard; Consuming device and power consumption all grow with each passing day, and have also brought the increase of electrical fire thereupon, and the electrical fire major part is owing to electric leakage earth fault causes; And the inner mechanical type control principle that adopts of traditional earth leakage protective device; Can only detect one road leakage current, have cost height, poor compatibility, can not satisfy the requirement of intelligent building design specifications technology.

The utility model content

The purpose of the utility model is to overcome above-mentioned deficiency, and a kind of multiloop fire detection device is provided.

The utility model solves the technical scheme that its technical matters adopted: a kind of multiloop fire detection device; Comprise multichannel residual current transformer testing circuit, fire-fighting link trigger circuit, single chip machine controlling circuit, display circuit, outage driving circuit and carrier signal phase lock circuitry; The signal of said residual current transformer testing circuit collection sends to the A/D data converting circuit through analog switching circuit; The output signal of A/D data converting circuit exports display circuit, outage driving circuit and carrier signal phase lock circuitry to through single chip machine controlling circuit control; Said carrier signal phase lock circuitry output signal is delivered to the carrier signal decoding scheme through the frequency-selecting amplifier circuit, and said fire-fighting link trigger circuit export the outage driving circuit to through single chip machine controlling circuit control.

The pressure limiting filtering circuit that the induced voltage signal that said residual current transformer testing circuit is produced by the residual current transformer output terminal is formed through resistance, electric capacity, diode sends to the LM358 operational amplifier and constitutes.

Said fire-fighting link trigger circuit are made up of fire alarm address module QM output connection resistance R 17, photoelectrical coupler U3.

Said display circuit adopts the LCD LCD.

Said carrier signal phase lock circuitry is made up of LM567 tone decoder U1 and peripheral electric capacity 1C1, resistance 1R1, resistance 1R2 thereof.

Said frequency-selecting amplifier circuit is made up of elementary L1, electric capacity 1C2, the capacitor 1C3 of triode VT1, audio-frequency transformer (AFT) T, and sends data-signal through telephone wire to the carrier signal decoding scheme through secondary L2, the electric capacity 1C4 of audio-frequency transformer (AFT) T.

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

Through adopting above-mentioned technical scheme, the beneficial effect of the utility model is: the electric leakage signal that this device is gathered multichannel detects, and integrates monitoring, shows, reports to the police, and through the carrier signal radio alarming, reduces cost effectively, compatible height.

Description of drawings

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

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

Embodiment

Like Fig. 1, shown in Figure 2; A kind of multiloop fire detection device of the utility model; Comprise multichannel residual current transformer testing circuit 1, fire-fighting link trigger circuit 2, single chip machine controlling circuit 3, display circuit 4, outage driving circuit 5 and carrier signal phase lock circuitry 6; The signal that said residual current transformer testing circuit 1 is gathered sends to A/D data converting circuit 12 through analog switching circuit 11; The output signal of A/D data converting circuit 12 exports display circuit 4, outage driving circuit 5 and carrier signal phase lock circuitry 6 to through single chip machine controlling circuit 3 controls; Said carrier signal phase lock circuitry 6 output signals are delivered to carrier signal decoding scheme 8 through frequency-selecting amplifier circuit 7, and said fire-fighting link trigger circuit 2 export outage driving circuit 5 to through single chip machine controlling circuit 3 controls.

The pressure limiting filtering circuit that the induced voltage signal that said residual current transformer testing circuit 1 is produced by the residual current transformer output terminal is formed through resistance, electric capacity, diode sends to the LM358 operational amplifier and constitutes; When passing residual current transformer 1LN and earth fault occurs, the electric leakage signal of this moment, the output terminal of residual current transformer 1LN produce small induced voltage signal through resistance R 1 current limliting; Resistance R 2 dividing potential drops; Diode D1 and D2 pressure limiting to capacitor C 1 charging, are input to the 3rd pin that chip IC 7 is amplified in the LM358 computing again after resistance R 4 current limlitings; Amplify chip IC 7 through the LM358 computing data-signal is amplified the back by its 1st pin output high level; After diode D3 rectification, be input to the filtering circuit of forming by resistance R 8 and capacitor C 3, export linear voltage, be input to the 13rd pin of analog switch chip IC 5.

This moment, the 13rd pin of chip IC 5 was a high level, and through the switch way of single-chip microcomputer IC1 control switching analoging switch chip IC 5, analog switch chip IC 5 the 3rd pin output terminal is output as high level; Be input to the 2nd pin input end of A/D conversion chip IC2, the data-signal after the A/D conversion sends to the 32nd, 33, the 28 pin composition data telecommunication circuits of single-chip microcomputer IC1, after single-chip microcomputer IC1 internal processes is judged; Divide three the tunnel to send control signal output; First via output through resistance R 19 current limlitings, makes triode Q1 conducting by the 24th pin output high level of single-chip microcomputer IC1; Promote cut-off relay J1 adhesive, make power cutoff mechanism thread off and move; The second tunnel output is formed the indicated data communication circuit by the 4th, 5,6,7 pin of single-chip microcomputer IC1 and the 3rd, 4,5,6 pin of LCD LCD IC4, sends driving data information by single-chip microcomputer IC1, and LCD LCD IC4 shows current electrical leakage and way.Third Road output is formed carrier signal phase lock circuitry 6 by the multivibrator that LM567 tone decoder U1 and peripheral electric capacity 1C1, resistance 1R1, resistance 1R2 thereof constitute; Its oscillation frequency is by the parameter determining of electric capacity 1C1, resistance 1R1, and carrier frequency is adjusted in the 150-300KHZ scope.Elementary L1, electric capacity 1C2, capacitor 1C 3 by triode VT1, audio-frequency transformer (AFT) T constitute frequency-selecting amplifier circuit 7; The 39th pin output high level signal by single-chip microcomputer I C1; Make LM567 tone decoder U1 obtain working power; LM567 tone decoder U1 starts working, and is coupled on local telephone network speaking wire or the AC network AC220V power lead and is sent by secondary L2, the electric capacity 1C4 of audio-frequency transformer (AFT) T, sends data-signal to the carrier wave main frame.Said carrier signal decoding scheme 8 is made up of the audio-frequency transformer (AFT) T1, LM567 ATD U2, triode VT2, the LED that connect successively; The time constant of resistance 2R1, electric capacity 2C5 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 2C1, audio-frequency transformer (AFT) T1, its secondary L 3, electric capacity 2C2, electric capacity 2C 3 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 2C4; After LM567 ATD U2 decoding,, make triode VT2 conducting by its 8th pin output terminal output low level; LED is lighted; Received the carrier data signal of extension set, leak current fault has been sent in expression, should in time get rid of.The principle of residual current transformer 8LN is identical with the principle of work of residual current transformer 1LN, just no longer repeats here.

Said fire-fighting link trigger circuit 2 are made up of fire alarm address module QM output connection resistance R 17, photoelectrical coupler U3, and when fire took place, fire alarm address module QM transferred normally closed closing to by often opening; Photoelectrical coupler U3 transfers conducting state to by ending, and this signal is input to the 15th pin I/O end of single-chip microcomputer IC1, by the 24th pin output high level of single-chip microcomputer IC1; Through resistance R 19 current limlitings, make triode Q1 conducting, promote cut-off relay J1 adhesive; Making power cutoff mechanism thread off moves; Reach fire-fighting and cut the load main circuit power by force, avoid sending warning message through the carrier signal transmission to the carrier wave main frame simultaneously because of electric wiring produces fire spread.

An above-described preferred embodiment that is merely the 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. multiloop fire detection device; It is characterized in that: comprise multichannel residual current transformer testing circuit (1), fire-fighting link trigger circuit (2), single chip machine controlling circuit (3), display circuit (4), outage driving circuit (5) and carrier signal phase lock circuitry (6); The signal that said residual current transformer testing circuit (1) is gathered sends to A/D data converting circuit (12) through analog switching circuit (11); The output signal of A/D data converting circuit (12) exports display circuit (4), outage driving circuit (5) and carrier signal phase lock circuitry (6) to through single chip machine controlling circuit (3) control; Said carrier signal phase lock circuitry (6) output signal is delivered to carrier signal decoding scheme (8) through frequency-selecting amplifier circuit (7), and said fire-fighting link trigger circuit (2) export outage driving circuit (5) to through single chip machine controlling circuit (3) control.

2. a kind of multiloop fire detection device according to claim 1 is characterized in that: the pressure limiting filtering circuit that the induced voltage signal that said residual current transformer testing circuit (1) is produced by the residual current transformer output terminal is formed through resistance, electric capacity, diode sends to the LM358 operational amplifier and constitutes.

3. a kind of multiloop fire detection device according to claim 1 is characterized in that: said fire-fighting link trigger circuit (2) are made up of fire alarm address module QM output connection resistance R 17, photoelectrical coupler U3.

4. a kind of multiloop fire detection device according to claim 1 is characterized in that: said display circuit (4) adopts the LCD LCD.

5. a kind of multiloop fire detection device according to claim 1 is characterized in that: said carrier signal phase lock circuitry (6) is made up of LM567 tone decoder U1 and peripheral electric capacity 1C1, resistance 1R1, resistance 1R2 thereof.

6. a kind of multiloop fire detection device according to claim 1; It is characterized in that: said frequency-selecting amplifier circuit (7) is made up of elementary L1, electric capacity 1C2, the capacitor 1C3 of triode VT1, audio-frequency transformer (AFT) T, and sends data-signal through telephone wire to carrier signal decoding scheme (8) through secondary L2, the electric capacity 1C4 of audio-frequency transformer (AFT) T.

7. according to claim 1 or 6 described a kind of multiloop fire detection devices, it is characterized in that: said carrier signal decoding scheme (8) is made up of the audio-frequency transformer (AFT) T1, LM567 ATD U2, triode VT2 and the LED that connect successively.