CN2441193Y

CN2441193Y - Infrared security alarm

Info

Publication number: CN2441193Y
Application number: CN 00230940
Authority: CN
Inventors: 袁建军; 周楠
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-09-23
Filing date: 2000-09-23
Publication date: 2001-08-01
Anticipated expiration: 2010-09-23

Abstract

The utility model relates to an infrared security alarm used for security and theft prevention, which is composed of a casing body and a circuit thereof. The utility model is characterized in that the outer side of the casing body is provided with infrared transmitting and receiving heads, and the circuit is composed of a modulation emitting circuit, a receiving and amplifying circuit, a control delay circuit, and a power supply circuit; the modulation emitting circuit is connected in series between an electric filter and an oscillator through a current limiting resistor and an infrared emitting tube; the receiving and amplifying circuit is connected with the oscillator through a resistor, and then is connected between an arithmetic amplifying circuit and a detector diode through a capacitor; the control delay circuit is connected between a relay and the ground through the capacitor; the output terminal of the power supply circuit is connected with the output terminal of each circuit. The utility model has the advantages of novel structure, convenient installation and operation, high safety, and low cost.

Description

Infrared anti-theft alarm

The utility model relates to a kind of infrared anti-theft alarm that is used for safe antitheft.

Safe antitheft is the problem that every family is concerned about, also is the problem of social institute extensive concern.At present, widely used burglary-resisting installation one is an alarm; The 2nd, anti-theft net also has other forms of anti-theft measure, as antitheft door, theftproof lock or the like, but in present burglary-resisting installation, it uses and is unsatisfactory, is example with alarm and anti-theft net, mostly present alarm is to adopt directly touches formula, having only human body to run into could report to the police, but also not exclusively reliable sometimes, particularly subjects to artificial destruction, alarm is malfunctioning, does not reach to take precautions against the warning purpose; Mostly anti-theft net is to have a lot of problems by metal boom net.At first be fire fighting problem, in case there is fire to take place, owing to there is iron bar to intercept, personnel are difficult to escape, and the fire fighter also is difficult to rescue, but also because the help of iron bar is arranged, the burglar is able to climb last layer resident family by anti-theft net and steals, and anti-theft net is also dangerous, and the waste resource.Mixed and disorderly anti-theft net is very ugly, influences appearance of the city ring scape, and the high-rise difficulty of installing is difficult to effective application.

The purpose of this utility model is exactly to provide a kind of novel infrared anti-theft alarm at the needs of the problems referred to above and reality, to solve the safe antitheft problem effectively.

The purpose of this utility model is achieved like this, the alarm operating circuit that dress is made of modulation transmitter, reception amplifying circuit, control delay circuit and power circuit in housing, its housing is outer to be equipped with infrared head and infrared receiving terminal through lead, form the modulation transmitter device by vibration IC1 integrated package and corresponding resistor, electric capacity and infrared emission tube, amplifier IC2 integrated package and corresponding resistor, electric capacity, diode and red line receiving tube are formed the reception amplifying circuit; Form the control delay circuit by switching transistor and relay and corresponding resistor, electric capacity and alarm; By commutation diode, transformer, electric capacity and integrated package of pressure-stabilizing IC3 and electric battery are formed power circuit, modulation transmitter is serially connected with between power supply and the IC1 by current-limiting resistance and infrared emission tube, receiving amplifying circuit links to each other with the IC1 of modulation transmitter by resistance, constitute gating circuit, be connected between the negative pole of IC2 and detector diode through electric capacity again, the control delay circuit is connected between relay control end and the ground through electric capacity, resistance is connected between electric capacity and the transistor base, constitute delay circuit, the negative pole parallel connection of the switching diode of power circuit, be connected to IC3 and modulation transmitter, receive amplifying circuit, the power end of control delay circuit is borrowed each circuit power and is realized alternating current and battery-powered conversion.

Its novel structure uniqueness of the utility model, easy to install, safe and reliable, cost is low, easily produces, and it is promoted the use of, and can protect resident's safety effectively, and good economic and social benefit is arranged.

Below in conjunction with accompanying drawing structure of the present utility model and working condition are elaborated.

Fig. 1 is structural drawing of the present utility model (opening the vertical view of loam cake).

Fig. 2 is a circuit diagram of the present utility model.

Provide by Fig. 1, the utility model is to be made of housing and its circuit, the circuit board 1 of circuit is housed, transformer 2, battery 3 is contained in the housing 4 successively, the power end of circuit connects external power supply plug 5 through lead, loudspeaker 6 is contained in housing 4 outsides, infrared 7 is equipped with in housing 4 outsides, infrared receiving terminal 8, said circuit is by modulation transmitter, receive amplifying circuit, the control delay circuit, power circuit constitutes, the current-limiting resistance R3 of modulation transmitter and infrared emission tube TLN104 are connected in series between 3 pin of power supply and oscillator IC1,3 pin of IC1 are through 2 pin of resistance R 13 with amplifier integrated circuit (IC) 2, resistance R 12 is joined, 2 pin that receive the IC2 of amplifying circuit link to each other with 3 pin of the IC1 of modulation transmitter by resistance R 13, constitute gating circuit, the capacitor C 8 that receives amplifying circuit is connected to 1 pin and the detector diode D4 of IC2, between the node of D5, the capacitor C 10 of control time-delay electricity is connected between relay control end and the ground, resistance R 19 is connected between capacitor C 10 and the transistor T4, the switching diode D1 negative pole of power circuit and the negative pole of switching diode D2 link to each other, be connected to the integrated regulator IC3 and the modulation transmitter of power circuit, receive amplifying circuit, the power end of control delay circuit is realized exchanging and battery-powered conversion for each circuit power and through bridge rectifier B1.

In foregoing circuit, its IC1 adopts NE555 type oscillator integrated circuit (piece), and IC2 is made up of IC2:A, IC2:B, IC2:C, adopts LM324 type computing amplification circuit (piece), and IC3 adopts 7812 integrated regulators (piece).Infrared emission tube TLN104 among Fig. 2 is installed in the infrared 7 among Fig. 1, and infrared receiver tube TLP104 is installed in the infrared receiving terminal 8.Loudspeaker S1 is a loudspeaker 6 among Fig. 1 among Fig. 2.

It is constructed as follows to provide said modulation transmitter, reception amplifying circuit, control delay circuit and power circuit by Fig. 2:

1, modulation transmitter is made up of ic chip 1, resistance R 1, resistance R 2, current-limiting resistance R3, capacitor C 2, capacitor C 3 and infrared emission tube TLN104, wherein current-limiting resistance R3 and infrared emission tube TLN104 are connected in series between 3 pin and power supply of IC1, resistance R 1 and resistance R 2 are connected in series between 4 pin and 2 pin of IC1, and the node of resistance R 1 and resistance R 2 links with 7 pin of IC1 again, capacitor C 3 is connected between 5 pin and ground of IC1, capacitor C 2 is connected between 2 pin and ground of IC1,2 pin and 6 pin of IC1 link, after linking, 4 pin and 8 pin connect power supply, 1 pin ground connection.

2, receive amplifying circuit by ic chip 2, resistance R 4, capacitor C 4, capacitor C 5, resistance R 5, capacitor C 6, infrared receiver tube TLP104, resistance E8, resistance R 9, resistance R 6, resistance R 7, capacitor C 7, resistance R 10, resistance R 11, resistance R 12, resistance 13, capacitor C 8, detector diode D4, detector diode D5, capacitor C 9, resistance R 16, resistance R 14, resistance R 15 is formed, wherein resistance R 4 and capacitor C 4 are connected in series between power supply and the ground, capacitor C 5 is connected between the node and ground of resistance R 4 and capacitor C 4, resistance R 5 and infrared receiver tube TLP104 are connected in series between capacitor C 5 and the ground, resistance R 6 and resistance R 7 are connected in series between capacitor C 5 and the ground, capacitor C 6 and resistance R 8 are connected in series between 6 pin of the node of resistance R 5 and infrared receiver tube TLP104 and IC2:B, the node of 5 pin of IC2:B and resistance R 6 and resistance R 7 links, resistance R 9 is connected between 6 pin and 7 pin of IC2:B, capacitor C 7 is connected between 3 pin of 7 pin of IC2:B and IC2:A, resistance R 10 and resistance R 11 are connected in series between power supply and the ground, and resistance R 10 links with the node of resistance R 11 and 3 pin of IC2:A, resistance R 12 and resistance R 13 are connected in series between 3 pin of power supply and IC2:A, and resistance R 12 links with the node of resistance R 13 and 2 pin of IC2:A, 4 pin of IC2:A connect power supply, 11 pin ground connection, detector diode D4 and D5 are connected in series between 10 pin and ground of IC2:C, capacitor C 8 is connected between the node of 1 pin of IC2:A and detector diode D4 and D5, capacitor C 9 is connected between 10 pin and ground of IC2:C, and resistance R 14 links with the node of resistance R 15 and 9 pin of IC2:C.

3, the control delay circuit is made up of resistance 17, resistance 18, switching transistor T3, relay J 1, resistance 19, electric capacity 10, transistor T 4, resistance R 20, transistor T 5, transistor T 6, relay J 2 and speaker S1.Wherein resistance 17 and resistance R 18 are connected in series between 8 pin and ground of IC2:C, the base stage of switching transistor T3 and resistance R 17 link with the node of resistance R 18, the grounded emitter of switching transistor T3, relay J 1 is connected between the collector of power supply and switching transistor T3, capacitor C 10 is connected between the control end and ground of relay J 1, resistance R 19 is connected between the base stage of the control end of relay J 1 and transistor T 4, resistance R 20 is connected between the collector of power supply and transistor T 4, the emitter of transistor T 4 connects the base stage of transistor T 5, the collector of transistor T 5 connects the collector of transistor T 4, the emitter of transistor T 5 connects the base stage of transistor T 6, resistance R 21 is connected between the emitter and ground of transistor T 5, the coil of relay J 2 is connected between the collector of power supply and transistor T 6, the grounded emitter of transistor T 6, loudspeaker S1 is connected between the control end and ground of relay J 2.

4, power circuit is made up of transformer TRANS, bridge rectifier B1, capacitor C 1, integrated package of pressure-stabilizing IC3, switching diode D1, electric battery BATTERY and switching diode D2.The output terminal of the input termination transformer TRANS of bridge rectifier B1 wherein, capacitor C 1 connect and the output terminal and ground of bridge rectifier B1 between, 1 pin of integrated package of pressure-stabilizing IC3 links to each other with the output terminal of bridge rectifier B1, the 2 pin ground connection of integrated package of pressure-stabilizing IC3, the positive pole of switching diode D1 connect integrated package of pressure-stabilizing IC3 3 pin, the minus earth of electric battery BATTERY, the positive pole of electric battery BATTERY connects the positive pole of switching diode D2, the negative pole of the negative pole of switching diode D1 and switching diode D2 links, output DC.

Principle of work of the present utility model is as follows: in normal operating conditions, after the power circuit energising, IC1 starting of oscillation in the modulation transmitter, the 3 pin mains ripples of IC1, infrared emission tube TLN104 launches the infrared pulse light wave, after this infrared pulse light wave is received infrared receiver tube TLP104 in the amplifying circuit and receives, just convert pulse signal to.This signal is exaggerated in second operational amplifier of IC2, and first operational amplifier that is admitted to IC2 then carries out gating relatively.Because the 3 pin mains ripples of IC1 change, therefore the 2 pin voltages of IC2:A change synchronously, make the signal of the 3 pin input of IC2:A convert the 1 pin output of square wave to from IC2:A by sine wave, press detection fully through detector diode D4 and detector diode D5 again, form a high level, this high level the comparative voltage of 9 pin of the 3rd operational amplifier of IC2 and IC2:C relatively after, output low level, the base stage no signal of switching transistor T3 in the control delay circuit, transistor T 3 is in cut-off state, the control delay circuit is failure to actuate, in the warning duty, be that the infrared ray loop is when being interdicted, because the infrared receiver tube TLP104 that receives in the amplifying circuit can not receive the infrared pulse light wave, then second operational amplifier of IC2 is output as zero, therefore first operational amplifier of IC2 is output as low level, so the 3rd operational amplifier of IC2 output high level, the base stage of switching transistor T3 in the control delay circuit gets signal, transistor T 3 conductings, relay J 1, the control end action of relay J 1, capacitor C 10 begins charging, transistor T 4, transistor T 5, transistor T 6 conductings simultaneously, relay J 2, the control end action, loudspeaker SI gets electric sounding, if recover immediately in the infrared ray loop, receives amplifying circuit and also recovers normal operating conditions, switching transistor T3 in the control delay circuit is in cut-off state again, relay J 1 dead electricity, the control end of relay J 1 disconnects, and capacitor C 10 stops charging, but capacitor C 10, capacitor C 10 is in discharge condition, transistor T 4, transistor T 5, crystal T6 still wants conducting a period of time, and relay J 2 is adhesive a period of time more also, loudspeaker SI has been put until capacitor C 10 still at sounding.

The utility model position of its installation in use is that infrared head and infrared receiving terminal point-blank are installed under balcony or the windowsill, apart from wall 30CM.Can prevent effectively that the burglar is by balcony or window burglary.

Claims

1, a kind of infrared anti-theft alarm, be to constitute by housing and circuit thereof, the circuit board (1) of circuit is housed, transformer (2), battery (3) is contained in the housing (4) successively, the power end of circuit connects external power supply plug 5 through lead), loudspeaker (6) is contained in housing (4) outside, it is characterized in that, infrared head (7) is equipped with in housing (4) outside, infrared receiving terminal (8), said circuit is by modulate emission electrical equipment, receive amplifying circuit, the control delay circuit, power circuit constitutes, the current-limiting resistance R3 of modulation transmitter and infrared emission tube TLN104 are connected in series between 3 pin of power supply and oscillator IC1,3 pin of IC1 are through 2 pin of resistance R 13 with amplifier integrated circuit (IC) 2, resistance R 12 is joined, 2 pin that receive the IC2 of amplifying circuit link to each other with 3 pin of the IC1 of modulation transmitter by resistance R 13, constitute gating circuit, the capacitor C 8 that receives amplifying circuit is connected to 1 pin and the detector diode D4 of IC2, between the node of D5, the capacitor C 10 of control delay circuit is connected between relay control end and the ground, resistance R 19 is connected between capacitor C 10 and the transistor T4, the switching diode D1 negative pole of power circuit and the negative pole of switching diode D2 link to each other, and are connected to the integrated regulator IC3 and the modulation transmitter of power circuit, receive amplifying circuit, the power end of control delay circuit.

2, infrared anti-theft alarm according to claim 1, it is characterized in that said modulation transmitter is by ic chip 1, resistance R 1, resistance R 2, current-limiting resistance R3, capacitor C 2, capacitor C 3 and infrared emission tube TLN104 form, wherein current-limiting resistance R3 and infrared emission tube TLN104 are connected in series between 3 pin and power supply of IC1, resistance R 1 and resistance R 2 are connected in series between 4 pin and 2 pin of IC1, and the node of resistance R 1 and resistance R 2 links with 7 pin of IC1 again, capacitor C 3 is connected between 5 pin and ground of IC1, capacitor C 2 is connected between 2 pin and ground of IC1,2 pin and 6 pin of IC1 link, after linking, 4 pin and 8 pin connect power supply, 1 pin ground connection.

3, infrared anti-theft alarm according to claim 1, it is characterized in that said reception amplifying circuit is by ic chip 2, resistance R 4, capacitor C 4, capacitor C 5, resistance R 5, capacitor C 6, pipe TLP104 is received in infrared combustion, resistance R 8, resistance R 9, resistance R 6, resistance R 7, capacitor C 7, resistance R 10, resistance R 11, resistance 12, resistance R 13, capacitor C 8, detector diode D4, detector diode D5, capacitor C 9, resistance R 16, resistance R 14, resistance R 15 is formed, wherein resistance R 4 and capacitor C 4 are connected in series between power supply and the ground, the node that capacitor C 5 is connected to resistance R 4 and capacitor C 4 and ground with, resistance R 5 and infrared receiver tube TLP104 are connected in series between capacitor C 5 and the ground, resistance R 5 and resistance R 7 are connected in series between capacitor C 5 and the ground, capacitor C 6 and resistance R 8 are connected in series between 6 pin of the node of resistance R 5 and infrared receiver tube TLP104 and IC2:B, the node of 5 pin of IC2:B and resistance R 6 and resistance R 7 links, resistance R 9 is connected between 6 pin and 7 pin of IC2:B, capacitor C 7 is connected between 3 pin of 7 pin of IC2:B and IC2:A, resistance R 10 and resistance R 11 are connected in series between power supply and the ground, and resistance R 10 links with the node of resistance R 11 and 3 pin of IC2:A, resistance R 12 and resistance R 13 are connected in series between 3 pin of power supply and IC2:A, and resistance R 12 links with the node of resistance R 13 and 2 pin of IC2:A, 4 pin of IC2:A connect power supply, 11 pin ground connection, detector diode D4 and D5 are connected in series between 10 pin and ground of IC2:C, capacitor C 8 is connected between the node of 1 pin of IC2:A and detector diode D4 and D5, capacitor C 9 is connected between 10 pin and ground of IC2:C, resistance R 16 is connected between 10 pin and ground of IC2:C, resistance R 14 and resistance R 15 are connected in series between power supply and the ground, and resistance R 14 links with the node of resistance R 15 and 9 pin of IC2:C.

4, infrared anti-theft alarm according to claim 1 is characterized in that said control delay circuit is made up of resistance 17, resistance 18, switching transistor T3, relay J 1, resistance 19, electric capacity 10, transistor T 4, resistance R 20, transistor T 5, transistor T 6, relay J 2 and loudspeaker SI.Wherein resistance R 17 and resistance R 18 are connected in series between 8 pin and ground of IC2:C, the base stage of switching transistor T3 and resistance R 17 link with the node of resistance R 18, the grounded emitter of switching transistor T3, relay J 1 is connected between the collector of power supply and switching transistor T3, capacitor C 10 is connected between the control end and ground of relay J 1, resistance R 19 is connected between the base stage of the control end of relay J 1 and transistor T 4, resistance R 20 is connected between the collector of power supply and transistor T 4, the emitter of transistor T 4 connects the base stage of transistor T 5, the collector of transistor T 5 connects the collector of transistor T 4, the emitter of transistor T 5 connects the base stage of transistor T 6, resistance R 21 is connected between the emitter and ground of transistor T 5, the coil of relay J 2 is connected between the collector of power supply and transistor T 6, the grounded emitter of transistor T 6, loudspeaker SI is connected between the control end and ground of relay J 2.