CN2293864Y

CN2293864Y - Sound anti-theft alarmer

Info

Publication number: CN2293864Y
Application number: CN 97219213
Authority: CN
Inventors: 顾记有
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-06-17
Filing date: 1997-06-17
Publication date: 1998-10-07
Anticipated expiration: 2007-06-17

Abstract

The utility model relates to a sound anti-theft alarm which is composed of a power supply circuit, a detecting control circuit and a language alarm circuit, wherein, the detecting control circuit is composed of a main switch K1, a controllable silicon SCR1, a luminous diode 2D, a voltage-dividing resistor R2, a trigger, an NOT gate F3, etc. which are continuously connected with each other, wherein, the trigger is composed of the controllable silicon SCR1, a current-stabilizing capacior C3, diodes D7 and D8, an NOT gate F, an NOT gate F2, and resistors R5 and R7. The diodes are used for indicating an alarm site, and a loudspeaker is used for sending out an alarm signal. The utility model has the characteristics that the structure of the circuits is simple, the work performance is stable, the detection circuit can send out the alarm sound even under the condition of short circuit and broken circuit, the continuous alarm can be realized as long as the circuit is triggered, etc.

Description

The voice burglar alarm

The utility model belongs to technical field of electronic products in the electronic circuit, relates to a kind of voice burglar alarm.

At present, in the prior art, a lot of according to the employed on-the-spot sounding alarm kind of different environments for use, its circuit structure characteristics of having nothing in common with each other, it is simple that the complexity that has has, there are various situations in this class alarm in each side such as structure, efficient, stability, power consumption, economic worths, and various excellent, shortcomings are promptly arranged.As patent CN2225070Y is exactly a kind of in this class alarm.

Characteristics such as the utility model provides a kind of voice burglar alarm of on-the-spot sounding, has good stability, and is easy for operation, and theftproof performance is good.

The technical scheme that realizes the present utility model purpose is: a kind of voice burglar alarm, by power supply, survey control, language alarm three partly circuit is formed, power supply partly circuit output end is connected to detection control circuit, master switch K1 one termination power of detection control circuit, the other end is connected to controllable silicon SCR 1, light emitting diode 2D and divider resistance R2, controllable silicon SCR 1 another termination voice alarm circuit, it triggers the control utmost point and connects controllable silicon SCR 2 output terminals, SCR2 input end sending and receiving optical diode D2, output terminal is through resistance R 9 ground connection, SCR2 triggers the control utmost point and is connected to resistance R 4, resistance R 4 front ends are through current stabilization capacitor C 3 ground connection, the rear end is connected to two diode D7, D8 and resistance R 10, the other end ground connection of resistance R 10, one of termination is by not gate F1 behind the diode D7, F2 and resistance R 5, the trigger that R7 forms, not gate F1, the F2 series connection, F2 output terminating diode D7, input end is on the one hand through resistance R 7 ground connection, on the one hand through resistance R 8, resistance R 8 ground connection, the output terminal of termination not gate F3 behind diode D8, the input end of F3 is through resistance R 6, resistance R 8 ground connection, probe circuit is made up of K switch 2 of resistance R 3 series connection, and its preceding terminating resistor R2 rear end is through resistance R 8 ground connection.

The utility model in use, energized K switch 1, the probe of R3 and K2 composition is put into the monitoring place, locate as door, window, valuables etc., K switch 2 is connected, circuit is initially located in the monitoring state of alert, at this moment, power supply is supplied with the power supply of not circuit 4.5V after the R2 step-down, and with it as reference voltage (Vdd), 4.5V voltage after resistance R 3, R8 dividing potential drop, R8 is the 2.4V that is of end, and not gate F3 input this moment current potential is 2.4V, greater than its gate level 1/2Vdd, F3 is output as low level zero, and D8 ends; It is 2/3Vdd that not gate F1, F2 and resistance R 5, R7 form the triggering level of Schmidt trigger on it, thus the time R8 upper end level be 2.4V less than its triggering level, trigger does not overturn, the output terminal of F2 is a low level zero, D7 also ends.Because of D7, D8 all end, controllable silicon SCR 2 triggers controls very low level zero, and the voice alarm circuit no current is not worked, and whole alarm is on the alert.

When door, window taking place by switch, when article such as are moved at situation, K switch 2 is disconnected, (or probe circuit is twisted when breaking), terminal potential becomes low level zero on the resistance R 8, and this level is less than the gate level 2/3Vdd of the trigger of F1, F2, R5, R7 composition, and trigger can not overturn, F2 is output as low level zero, and D7 ends; But this moment, the F3 input end is a low level zero, after oppositely exporting, F3 is high level, the D8 conducting, and the high level of output provides trigger voltage and electric current through resistance R 4 to SCR2, SCR2 is because of obtaining triggering, from by becoming conducting, form voltage drop in resistance R 9 upper ends, SCR1 is switched on too, voice alarm circuit gets electric work, sends alerting signal.

When controlling a circuit two ends by short circuit, resistance R 8 upper side level are the 4.5V high level, are output as low level zero after F3 is reverse, and D8 ends; The trigger that F1, F2, R5, R7 form because of input end be high level greater than its gate level 2/3Vdd, the trigger upset is output as high level, the D7 conducting, the output high level impels SCR2 conducting, SCR1 conducting through resistance R 4, and voice alarm circuit gets electric work, sends alerting signal.

The utility model is reported to the police on-the-spot by the diode indication, send alerting signal by loudspeaker, it is simple to have a circuit structure, stable work in work, detection circuit can both give the alarm under short circuit, open circuit conditions, and circuit is once triggering the characteristics that continue warning, low cost of manufacture.

Below in conjunction with accompanying drawing the utility model is elaborated.

Accompanying drawing 1 is a working circuit diagram of the present utility model;

Accompanying drawing 2 is the working circuit diagram of the utility model power unit;

Accompanying drawing 3 is the working circuit diagram of the utility model language alarm part;

As shown in Figure 1, the utility model is by power supply, survey control, language alarm three partly circuit is formed, power supply partly circuit output end is connected to detection control circuit, master switch K1 one termination power of detection control circuit, the other end is connected to controllable silicon SCR 1, light emitting diode 2D and divider resistance R2, controllable silicon SCR 1 another termination voice alarm circuit, it triggers the control utmost point and connects controllable silicon SCR 2 output terminals, SCR2 input end sending and receiving optical diode D2, output terminal is through resistance R 9 ground connection, SCR2 triggers the control utmost point and is connected to resistance R 4, resistance R 4 front ends are through current stabilization capacitor C 3 ground connection, the rear end is connected to two diode D7, D8 and resistance R 10, the other end ground connection of resistance R 10, one of termination is by not gate F1 behind the diode D7, F2 and resistance R 5, the trigger that R7 forms, not gate F1, the F2 series connection, F2 output terminating diode D7, input end is on the one hand through resistance R 7 ground connection, on the one hand through resistance R 8, resistance R 8 ground connection, the output terminal of termination not gate F3 behind diode D8, the input end of F3 is through resistance R 6, resistance R 8 ground connection, probe circuit is made up of K switch 2 of resistance R 3 series connection, and its preceding terminating resistor R2 rear end is through resistance R 8 ground connection.

Power unit circuit of the present utility model is as shown in Figure 2: the 220V AC power is after transformer B step-down, through the D1-D4 rectification, C1 filtering, direct current about output 15V is delivered to IC1 and is carried out voltage stabilizing, output+12V power supply, the power supply of output divides two-way, the diode D5 K switch 1 of leading up to is powered to detection control circuit, charge to storage battery E through resistance R 1 in another road, storage battery E is by diode D6 and capacitor C 2, diode D5 connects, in case the civil power outage, storage battery E is back level electronic circuit power supply by D6 immediately, resistance R 1 is connected on diode D6 two ends, slowly charges for storage battery.

Language alarm circuit of the present utility model is as shown in Figure 3: the language storage stamen sheet IC3 in the circuit adopts a CMOS large scale integrated circuit, the warning term that interior storage user needs, 2 pin of IC3 are trigger end, when directly connecing noble potential, the warning speech signal that will in 4 pin output IC3, store up, signal is coupled to by C5 on input end 3 pin of power discharging IC 2 after R13, C7 low-pass filtering, make the audio frequency amplifying signal through IC2, be coupled to loudspeaker through capacitor C 6 and send alerting signal.

The utility model increases several groups of detection control circuits as long as between the front end and resistance R 9 front ends of resistance R 2 more, promptly can realize multiple alarm.

Claims

1, a kind of voice burglar alarm, by power supply, survey control, language alarm three partly circuit is formed, it is characterized in that: power output end connects detection control circuit, master switch K1 one termination power on the detection control circuit, the other end is connected to controllable silicon SCR 1, light emitting diode 2D and divider resistance R2, controllable silicon SCR 1 another termination voice alarm circuit, it triggers the control utmost point and connects controllable silicon SCR 2 output terminals, SCR2 input end sending and receiving optical diode D2, output terminal is through resistance R 9 ground connection, SCR2 triggers the control utmost point and is connected to resistance R 4, resistance R 4 front ends are through current stabilization capacitor C 3 ground connection, the rear end is connected to two diode D7, D8 and resistance R 10, the other end ground connection of resistance R 10, one of termination is by not gate F1 behind the diode D7, F2 and resistance R 5, the trigger that R7 forms, not gate F1, the F2 series connection, F2 output terminating diode D7, input end is on the one hand through resistance R 7 ground connection, on the one hand through resistance R 8, resistance R 8 ground connection, the output terminal of termination not gate F3 behind diode D8, the input end of F3 is through resistance R 6, resistance R 8 ground connection, probe circuit is made up of K switch 2 of resistance R 3 series connection, its preceding terminating resistor R2, the rear end is through resistance R 8 ground connection.