CN87208923U

CN87208923U - Cipher electronic theft-defencing means for vehicle

Info

Publication number: CN87208923U
Application number: CN198787208923U
Authority: CN
Inventors: 胡超凡; 方澄
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-06-06
Filing date: 1987-06-06
Publication date: 1988-02-24

Abstract

The utility model relates to a cipher electric alarm lock used for theft-defending for a vehicle, comprising a cipher unlocking triggering circuit, a relay control loop, a noise controlling switch circuit, a squealer and a switch alarm triggering circuit of the vehicle door, wherein, the normal open contact of the relay is connected with a power supply loop for the vehicle, the switch alarm triggering circuit of the vehicle door is composed of a switch control voltage divider of the vehicle door, an RC integrator, a double-end input and gate, a monostable circuit, and a drive gate circuit, and a hidden switch is connected in the relay control loop and the switch alarm triggering circuit of the vehicle door. The theft-defending appliance has the theft-defending functions of the cipher and the hidden switch used for controlling the power supply switch for the vehicle.

Description

Cipher electronic theft-defencing means for vehicle

The utility model relates to a kind of electronic cipher alarm lock that is used for automobile burglar.

In prior art, having delivered one on 1984 the 4 phases radio magazine has in limited time and the cipher electronic lock circuit of pseudo-key function, it is by the password unlocking trigger circuit, relay control circuit and unblank to carry out loop three parts and form, referring to Fig. 2, wherein the password unlocking trigger circuit comprise decade counter (1), password input button K1～K8, unblank to start button K0, monostable (2) in limited time, counting triggers monostable (3), unblank to trigger monostable (4), multiple unit tube direct current amplifier (5) and joint denial gate (6) and not gate (7) that counting machine (1) reset terminal R is controlled.A relay (10) is connected on the collecting electrode of amplifier (5), and formed the relay control circuit that constitutes by amplifier (5), relay (10) and power supply, an open contact of relay (8) and an electromagnet and power supply join and constitute an execution loop, when open the contact, dead bolt is kept latch mode by spring, when the closing of contact, electromagnet holds dead bolt and unblanks.

The password of this circuit is made up of five digit number, the bits per inch word can be in 1～8 conversion arbitrarily, for the principle of work of this circuit is described, if password is 12345 bit digital, ABCDE end and Q0～Q4 end should be joined so, the FGH end joins with F ' G ' H ', and K6～K8 is pseudo-key.When energized, the mouth of monostable (2) (3) (4) is low level, the R end of counting machine (1) is put high level and is in reset mode, amplifier (5) is an off condition simultaneously, there is not electric current in the relay control circuit, therefore relay (10) is failure to actuate, and contact (8) are normally open, and the Q0 of this hour counter (1)～Q4 end removes Q ₀End is outside the high level, and all the other each ends are low level; When unblanking, click K0 earlier, the input end that the positive pulse that makes width of monostable (2) upset output be about 7 seconds is added to joint denial gate (6) makes the joint denial gate upset, the R end of counting machine (1) is placed low level, make it be in count status, holding time is about 7 seconds, then import password by 12345 order, at first click K1, monostable (3) are triggered and export a count pulse, and the high level of Q0 end moves to the Q1 end, then press K2, a count pulse is triggered and exported in monostable (3) again, and the high level that Q1 is held moves to the Q2 end, continues input then, make the high level of Q0 end move to the Q5 end, thereby trigger positive pulse of monostable (4) upset output, to cause amplifier (5) conducting, relay (10) moves and unblanks.If by pseudo-key, not gate (7) upset output high level places high level, counting machine to stop counting immediately at the R end of counting machine in input password mistiming.The password of this circuit also can be made as 6 or 4, and the input end of password input button sum counter is done corresponding increase and decrease.

The field of application of this cipher electronic lock circuit is narrower, particularly is not used for car alarm at present as yet.

The purpose of this utility model is in order to open up the application of cipher electronic lock, a kind of cipher automotive electronic anti-theft device to be provided.

Solution of the present utility model is as follows: at first the open contact with relay connects the automobile power source current supply circuit, make it play source switch, then above-mentioned relay control circuit is improved, this is because automobile power source should be in power supply state in automotive use, so require relay control circuit just should have electric current to flow through, make open contact be in closure state all the time always once triggering.Improved concrete way is to set up a silicon control, relay control circuit is by silicon control, relay and power supply connect formation, the mouth of the multiple unit tube direct current amplifier in described silicon controlled trigger end and the password unlocking trigger circuit joins, through after this improvement, the source switch of automobile becomes the source switch by the control of password unlocking trigger circuit.In order to increase anti-theft feature, hide switch in one of the earth point access of relay control circuit, as not closing this switch, be equivalent to relay control circuit and open circuit, even importing correct relay, password can not move yet.

Set up audible alarm circuit according to theft-proof needs, referring to Fig. 1, this circuit is made up of sound master cock circuit and squealer, the input end of described sound master cock circuit joins with the non-gate output terminal that the reset terminal R of counting machine is controlled, if mistake is by pseudo-key, then this not gate output high level is added to the input end of sound master cock circuit, makes the switch circuit conducting, the squealer sounding.Wherein squealer can be used horn trumpet, also can adopt other electric vocalization device.

In order further to increase some anti-theft featuries, the utility model has also been set up the door contact interrupter alarm trigger circuit, again referring to Fig. 1, this circuit has a both-end input and door, its input end joins with door contact interrupter control bleeder and a RC integrator, the trigger end of its mouth and a monostable circuit joins, another RC integrator of the output termination of monostable circuit, the output termination driving gate circuit of this integrator, the mouth of driving gate circuit and sound master cock circuit join, be connected to a shared bypass resistance at the electric capacity two ends of two RC integrators, this resistance is hidden switch ground connection by described, in the discharge that this effect of hiding switch is a control capacitance, the door contact interrupter alarm trigger circuit does not shut at car door, and the people is when about 45 meters of car, meeting output alarm energizing signal, if return into the car, in time not close and hide switch, this circuit is also with the output alarm energizing signal.

Describe in detail according to embodiment below.

Fig. 1 block scheme of the present utility model.

Fig. 2 circuit diagram of the present utility model.

Referring to Fig. 2,, at first should and hide switch (11) closure with source switch (36) if start automobile, can input password then, the password input is correct, and amplifier (5) is a conducting state, triggers silicon control (9) conducting simultaneously, relay (10) action, open contact (8) closure, the automobile power source current supply circuit is connected, and automobile can start, in relay control circuit, also be connected to an indicator lamp (19), as the correct indication of password input.

Again referring to Fig. 2, described squealer is made up of a horn trumpet and a piezoceramic (18), described sound master cock circuit is made of silicon control (15) (16) and multiple unit tube direct current amplifier (17), silicon controlled triggers the mouth of termination amplifier (17), and wiring S is connected on the non-bonding end of horn trumpet.If mistake is by on pseudo-key, not gate (7) output high level is added to the base stage of amplifier (17), makes its conducting, triggers silicon control (15) (16) conducting simultaneously, and horn trumpet and piezoceramic yowl and report to the police.

See also Fig. 2 again, door contact interrupter control bleeder is made of resistance (20) (21) and switch (23), this bleeder carries out dividing potential drop to power supply, switch (23) is connected on the open contact of door contact interrupter, it is opened during car door opening, during closing of the door, its closure, described both-end input connects formation with door by NAND gate (24) and not gate (25), described monostable circuit is by joint denial gate (26), not gate (27), resistance (28) and electric capacity (29) constitute, described driving gate circuit is made of not gate (30) (31), and the shared bypass resistance (13) of described integrating capacitor (32) (33) is by hiding switch (11) ground connection.In running car, hide switch and car door is closed, i.e. switch (23) and to hide switch (11) be closure state, two input ends of NAND gate this moment (24) are low level, and not gate (31) is output as low level; When the parking people will leave, to hide switch opens, relay control circuit is opened circuit, meanwhile, the RC integrator of being made up of resistance (22) and electric capacity (32) begins integration, be about 40 seconds integration time, when opening car door, switch (23) is opened, making the dividing potential drop mouth of door contact interrupter control bleeder is high level, if closed door not in 40 seconds, then the positive terminal potential of electric capacity (32) will reach the on-level of NAND gate (24) when 40 seconds, makes NAND gate (24) upset output low level, and the output high level triggers monostable circuit behind not gate (25), the monostable circuit positive pulse of output of overturning is immediately carried out integration to the RC integrator by resistance (35) and electric capacity (33) formation, be 7 seconds integration time, and when the positive terminal potential of electric capacity (33) reaches the on-level of not gate (30), it will overturn, and be added to the base stage of amplifier (17) by not gate (31) output high level, audible alarm circuit is triggered and report to the police.This function mainly is the situation stolen in order to prevent car door from not shutting, and through more than 40 seconds time-delay, this circuit sent alerting signal and makes the acoustic alarm sounding, and at this moment, the people walks out approximately from 45 meters in car far away, hear the sound after, can return to shut car door.After car door shut, the mouth of car door control bleeder was a low level, and the mouth of NAND gate (24) is a high level, and the mouth of not gate (31) is a low level; When the people returns to open car door, NAND gate (24) output low level of overturning immediately, trigger monostable circuit through not gate (25), positive pulse of monostable circuit upset output is to the RC integrator integration of resistance (35) and electric capacity (33) composition, if the not closed switch of hiding in 7 seconds forces electric capacity (33) discharge, then when 7 seconds, not gate (30) will be triggered, through not gate (31) output alarm energizing signal.This function plays further theft-proof effect.

Diode plays a part to isolate or unidirectional conducting among the figure, and the filtering of power supply can be adopted pi filter, and the power supply voltage stabilizing can be adopted stabilivolt.

Claims

1, car alarm, comprise password unlocking trigger circuit and relay control circuit, wherein the password unlocking trigger circuit are by decade counter (1), password input button K1～K8, unblank to start button KO, monostable in limited time (2), counting trigger monostable (3), unblank to trigger monostable (4), multiple unit tube direct current amplifier (5) and joint denial gate (6) and not gate compositions such as (7) that counting machine (1) reset terminal R controls be is characterized in that:

The open contact of a, relay (8) connects the automobile power source current supply circuit, described relay control circuit connects formation by a silicon control (9), relay (10) and power supply, the mouth of the trigger end of silicon control (9) and multiple unit tube direct current amplifier (5) joins, and hides switch (11) in one of the earth point access of described relay control circuit.

B, set up audible alarm circuit, this circuit is made up of sound master cock circuit and squealer, and the input end of described sound master cock circuit joins with the mouth of the not gate (7) that reset terminal R to counting machine (1) controls.

C, set up the door contact interrupter alarm trigger circuit, this circuit has a both-end input and door, its input end joins with door contact interrupter control bleeder and a RC integrator, the trigger end of its mouth and a monostable circuit joins, another RC integrator of the output termination of monostable circuit, the output termination driving gate circuit of this integrator, the mouth of driving gate circuit and sound master cock circuit join, and the electric capacity of described RC integrator (32) (33) two ends are connected to a shared bypass resistance (13), this resistance by hiding switch (11) ground connection.

2, Car Burglar Alarm as claimed in claim 1, it is characterized in that: described squealer is made up of a horn trumpet and a piezoceramic (18), described sound master cock circuit is made of silicon control (15) (16) and multiple unit tube direct current amplifier (17), and silicon controlled triggers the mouth of termination amplifier (17).