CN2293926Y

CN2293926Y - Beeper fire alarmer

Info

Publication number: CN2293926Y
Application number: CN 96226548
Authority: CN
Inventors: 张沛; 苏盛艺
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-06-12
Filing date: 1996-06-12
Publication date: 1998-10-07
Anticipated expiration: 2006-06-12

Abstract

The utility model relates to a beeper fire alarm. The utility model is characterized in that a power supply circuit is directly connected with a sensor, a detection amplifier, an oscillating circuit, a waveshape circuit and a double-audio signal circuit; a sensor is connected with the detection amplifier, an oscillating circuit, the waveshape circuit and the double-audio signal circuit in turn; the oscillating circuit is connected with the double-audio signal circuit, and a coding circuit is connected with the double-audio signal circuit. When the utility model is used, the modern communication equipment of a beeper and a telephone can be fully utilized, and the fire-alarm monitoring and the timely alarm for the installation part can be realized at any time. The utility model is suitable for the monitoring alarm of the place, in which no person is on duty; the utility model is also suitable for monitoring alarm of factory, storehouse, public space, family and other places, in which the night works are needed.

Description

The beeper fire-alarm

The utility model belongs to fire alarm installation a kind of and phone, beeper coupling.

Common fire alarm is to be made of sensing element, warning circuit, alarm sound, and the place that is used to determine and the personnel control in this place if personnel leave this place, then can't know the work of alarm.

The purpose of this utility model is on the basis that makes full use of phone and BP beeper, provides in a kind of scope of beeper function to report to the police timely.

This BP fire-alarm, comprise body, transducer, outlet, telephone jack, circuit board, it is characterized in that the direct and transducer of power circuit, detecting amplifier, oscillating circuit, waveform circuit, double-audio signal circuit link, transducer and detecting amplifier, oscillating circuit, waveform circuit, double-audio signal circuit link successively, oscillating circuit and double-audio signal circuit link, and coding circuit and double-audio signal circuit link.And power circuit and outlet link, and double-audio signal circuit and telephone jack link, and sensor circuit and gas sensor link.The effect of each electric elements is: 1. transducer: fuel gas, smog that the fire initial stage is produced detect.Fuel gas reaches certain value, and transducer sends signal; 2. detect and amplify: accept sensor signal, it is detected amplification.The visual different occasions of detection sensitivity require to regulate.The output signal control oscillation circuit; 3. oscillating circuit: the non-wide square wave that with the generation cycle is 4 minutes; 4. waveform forms circuit: according to the waveform that oscillating circuit produces, produce delay pulse and trigger the double-audio signal circuit; 5. double-tone number circuit frequently doubly: will produce the double-tone signal that takes place frequently out, and deliver in the telephone line generation beeper alarm calls signal; 6. coding circuit: the shown warning message of establishment beeper.This circuit is mainly formed by passing device QM, digital integrated circuit TC4049 and double-audio signal generation integrated circuit, its concrete operation principle is as follows: 1. power circuit: power transformer B becomes alternating current 220V into 9 volts of low pressure, the bridge circuit of being formed via diode D1～D4 carries out rectification, by capacitor C 1 filtering, obtain a galvanic current through integrated regulator IC1 and press again.2. testing circuit: transducer QM detects fuel gas, 1 pair of transducer heating circuit of resistance R current limliting, diode D5 effect is that current potential is promoted, the size of potentiometer W adjustable sensor output signal, diode D6 and capacitor C 3 have been formed anti-jamming circuit, to reduce the misoperation of circuit, more than 0.1%, capacitor C 3 just produces a high potential as if the combustable gas concentration of testing.

3. oscillating circuit: this circuit is by inverter F2, F3, F4 capacitor C 4, C5, and resistance R 2, R3, R4, R5, diode D7, D8, D9, triode V1 form.The signal of testing circuit output through the anti-phase amplification of inverter F1 afterwards control generator work with stop, when not having fuel gas, transducer QM export electronegative potential, exports high potential through the anti-phase amplification of F1.Deliver to the input of inverter F4 through diode D9, F4 exports electronegative potential, makes waveform form circuit and quits work.When fuel gas, said process is opposite, and F4 exports high level.The F2 output low level, F3 exports high level.Like this, capacitor C4, C5 begin charging by D8, R4.When capacitor voltage at both ends is charged to a half of supply voltage, the F4 output low level of overturning, F2 exports high level, F3 output low level.Capacitor C 4, C5 two terminal potentials can not suddenly change because F2 exports high level, make the current potential of F4 input rise to 2/3E.Electric capacity will discharge by D7, R3.Tele-release is during to 1/2E, F4 upset output high level.Like this, just finished a cycle of oscillation.The effect of triode V1 is the consistency that guarantees the waveform of oscillator when initial vibration, and promptly the terminal voltage of capacitor C 4C5 is zero when vibration has just begun.

4. waveform forms circuit: this circuit is made up of inverter F5, F6, resistance R 6, R7, R8, R9, capacitor C 6, C7, triode V2, V3, relay J 1, J2.The output of inverter F4 is divided into two tunnel: one tunnel adhesive of amplifying back control J1 through triode V2, and another road is through delay circuit of being made up of R7, C6, F5 and the differential circuit of being made up of C7, R8, F6, to control the adhesive of J2 after the triode V3 amplification.

5. double-audio signal circuit: this circuit mainly is made up of integrated circuit (IC) 3 (VM91210C) triode V5, and telephone wire is received the bridge rectifier of being made up of diode D14～D15 through resistance R 19.Obtain a stable voltage through D13, R15, C8, WZ, as the power supply of integrated circuit (IC) 3.R11, R12, C9, V4, R14 have formed the starting circuit of IC3.Crystal oscillator SJT, capacitor C 10, C11 and IC1 internal circuit are formed oscillator, are used to produce double-audio signal.After the amplification of double-audio signal through triode V5 of the 12 pin output of integrated circuit (IC) 3, send into telephone wire.The information of integrated device IC3 is imported into through plug-in unit Z by encoder.When J1 disconnected, IC3 information was kept by R10, D12, R13.After detecting smog, the J1 adhesive, IC3 10 pin have operating voltage, and integrated circuit (IC) 3 is played in the triode V4 conducting of delaying time.After the J2 adhesive, 12 pin of IC3 promptly send double-audio signal, send into telephone wire after V5 amplifies.By telephone office information is presented on the beeper.

6. coding circuit: this circuit is equivalent to a telephone keypad, illustrates using method:

Suppose 888-* * * * * * * be beeper number

Telephone number: 1234567

Reporting to the police the room is installed is 303

Operate as follows:

(1) with the K switch closure, press beeper numbers 888 * * * * * * *;

(2) by twice P key, press room number 303 again;

(3) open K switch.

Like this, warning message just deposits in the integrated circuit (IC) 3, and when the condition of a disaster, beeper will show 1234567-203 (telephone number-room number).The telephone number and the room number that have reflected the fire place, perhaps anti-room number changes the warning number of agreement into, can come normal call and fire alarm difference.

The utility model can carry out round-the-clock fire alarm monitoring to the infield, when fuel gas or smog reach finite concentration, carry into sending specific alarm calls signal to beeper by circuit, and do not influence the normal use of beeper, phone, particularly under the situation of unwatched place or operator on duty's rest at night, meeting the condition of a fire can report to the police timely, can make full use of beeper, phone modern communications equipment and the fire alarm of factory, warehouse, market, public place, family is monitored timely reliably report to the police.

Fig. 1 the utility model block diagram;

Fig. 2 the utility model perspective view;

Circuit structure schematic diagram on Fig. 3 circuit board;

Fig. 4 coding circuit structure principle chart.

Further specify concrete structure of the present utility model below in conjunction with accompanying drawing.

Consult Fig. 1, supply voltage 220V gives circuit supply by socket 14 (see figure 2)s, on the body 1 that gas sensor 2 is fixed, to the imflammable gas that the fire initial stage produces, smog is as detected object, as long as gas concentration reaches certain value, transducer sends signal, the detecting amplifier sensor-lodging detects amplification, and its detection sensitivity is adjustable, and output signal is used to drive oscillating circuit.The oscillating circuit generation cycle is 2.52 seconds a non-wide square wave.Waveform forms circuit and produces and waveform according to oscillating circuit, produces delay pulse and triggers the double-audio signal circuit.The double-audio signal circuit will produce double-audio signal and deliver in the telephone circuit by telephone jack 3, notify from a phone call beeper alarm calls signal, take 12 seconds telephone wire time, 4 minutes repetition of alarms time.Coding circuit produces the shown warning message of beeper.

Claims

1. beeper fire-alarm, comprise body, transducer, outlet, telephone jack, circuit board, it is characterized in that power circuit directly and transducer, detecting amplifier, oscillating circuit, waveform circuit, double-audio signal circuit link, transducer and detecting amplifier, oscillating circuit, waveform circuit, double-audio signal circuit link successively, and oscillating circuit and double-audio signal circuit link, coding circuit and double-audio signal circuit link.

2. according to the described alarm of claim 1, it is characterized in that power circuit and outlet link, double-audio signal circuit and telephone jack link, and sensor circuit and gas sensing link.