CN2231635Y - Anti-theft apparatus for automobile - Google Patents

Abstract

The utility model relates to a signal device for preventing an automobile from stealing, comprising a far end control device used for emitting an infrared code signal and a receiving alarm device arranged in the automobile. The receiving alarm device comprises an infrared code signal receiver, an air pressure detector used for detecting the variation of air pressure in the automobile, a battery voltage drop detector used for detecting the variation of the battery voltage drop, a central processing unit, an acoustic alarm, a flashing alarm, and a relay driver used for cutting the power supply of an ignition coil. An emitting device is used for setting or canceling the alert state. In the alert state, when glass is broken to lead the pressure change, or a lighting lamp is lighted because the door is opened to lead the battery voltage to drop, the utility model can be triggered to send out an alarm.

Description

Car alarm

The utility model relates to a kind of signalling apparatus, relates to a kind of signalling apparatus that is used for automobile burglar or rather.

Along with the raising of China's rapid development of economy, living standards of the people, national consumption to automobile requires also growing, and the class of bus, private car is also improving constantly, thereby the automobile burglar problem also becomes increasingly conspicuous, and causes the common concern of various social aspect.Existing automobile antikijacking burglar device, the drone version antitheft alarm system that is made of projector and receptor is for example arranged, by the mechanical type anti-joyride device at kayser T type link place between vehicle steering runner and runner strut bar, adopt the electronic on-off-type antitheft alarm system of cipher key control ignition coil etc., these car alarms respectively have merits and faults, but the problem of ubiquity function singleness.

The purpose of this utility model also is a kind of car alarm of design, makes it have the reliable in action of being swift in response, anti-theft effect outstanding feature.

Car alarm of the present utility model, with the central processing unit CPU is core control part, integrate multiple advanced person and actv. anti-theft measure, comprise emission and reception, the induction detection of car internal gas pressure and the reduction detection of automobile batteries voltage etc. of code signal, and utilize multiple means such as flash of light, the sound, the power supply of point of cutoff fire coil to stop and steal the continuity that garage is, thereby tangible anti-theft alarm effect is arranged.

Car alarm of the present utility model, comprise the far-end control device of launching code signal and the receiving alarm device that constitutes by code signal receptor, robber's car sensing receptor, central processing unit, the relay drive circuit of control ignition coil power supply, acoustic alarm, visual alarm, it is characterized in that:

Described robber's car sensing receptor comprises baroceptor and the air pressure sensing testing circuit thereof that induction automobile internal gas pressure changes, detect cell pressure down detection circuit and driving circuit that cell pressure descends, baroceptor, air pressure sensing testing circuit and driving circuit are linked in sequence, the output of cell pressure down detection circuit connects the input end of driving circuit, and driving circuit output connects an input port of described central processing unit;

Described visual alarm is the flash lamp circuit that is linked in sequence and is constituted by oscillator, booster circuit, thyristor gating circuit and flash light, and the input control end of flash lamp circuit connects a delivery port of described Central Processing Unit (CPU).

Described far-end control device is linked in sequence by password preselected circuit, coding and modulation circuit and infrared transmitter and constitutes; Described code signal receptor is an infrared ray receiving demodulation demoder, and the output of infrared ray receiving demodulation demoder connects an input port of described central processing unit.

Comprise that also one is used for the LED driving circuit that password receives demonstration, LED driving circuit input control end is connected with a delivery port of described Central Processing Unit (CPU).

The car owner leaves the preceding all door and windows of closing automobile of automobile, the receiving alarm device that utilizes far-end control device will be located in the car places the state of alert, described LED driving circuit orders about luminotron work and indicates this state, change when detecting the car internal gas pressure that (door glass is crashed to pieces, the vibration of burst etc.) or because of the room light lamp is bright cause when cell pressure descends (car door is opened the illuminating lamp that ignites), the central processing unit controls flash lamp circuit, sound circuit work, send strong flashing signal and audible indication, control relay driving circuit action simultaneously, the power supply of point of cutoff fire coil can not be driven away car robber person.

Further specify technology of the present utility model below in conjunction with the embodiment accompanying drawing

Fig. 1. the far-end control device frame principle figure

Fig. 2. the enforcement circuit diagram of far-end control device shown in Figure 1

Fig. 3. receiving alarm device frame principle figure

Fig. 4. the enforcement circuit diagram of signal reception and flash of light warning circuit in the receiving alarm device shown in Figure 3

Fig. 5. the enforcement circuit diagram of receiving alarm device centring control shown in Figure 3 and Ignition Control

Referring to Fig. 1, being linked in sequence by password preselected circuit 11, coding and modulation circuit 12 and infrared transmitter 13 constitutes far-end control device (remote controller), and password has set when password preselected circuit 11 is made.

Referring to Fig. 2, integrated IC1 of central process unit (PIC16C54 * T/P) connect and compose password preselected circuit and coding and modulation circuit, exportable 128000 kinds of coded combinations with resistance R 1-R16.Infrared emission tube L1 adopts high frequency (300MHZ) power valve, and S1 is the emission button among the figure, closed S1, and the preliminary election password that is stored among the IC1 amplifies driving L1 emission through Q1.

Referring to Fig. 3, connect and compose the receiving alarm device by signal reception and glisten warning circuit 20 and centring control and ignition control circuit 30,40 is the ignitor coil feed circuit among the figure.

Wherein, signal receives and flash of light warning circuit 20 comprises infrared ray receiving demodulation decoder circuit 21, the output decoded signal send centring control and ignition control circuit 30 through 3 ends (CODE), 22 is the air pressure inductor, 23 are air pressure induction testing circuit, resitstance voltage divider and cell pressure down detection circuit 24 by cell pressure (B-) connect and compose battery voltage detection circuit, 25 is driving circuit, driving circuit 25 outputting alarm control signals send centring control and ignition control circuit 30 through 4 ends (PRESS) when having pressure variation or cell pressure to descend in detecting car.26 is LED driving circuit, the state that glittering indication is operating after receiving the antitheft warning instruction of being sent by centring control and ignition control circuit 30, antitheft warning instruction is drawn by 2 ends (LEDS), at the password of far-end control device emission is the password that stores in password and the central control circuit of the output of infrared ray receiving demodulation demoder when consistent, and central control circuit is controlled LED driving circuit work by 2 ends and opened whole anti-theft system simultaneously.27 is flash lamp circuit, sends flash control signal by central control circuit 5 ends (FLASH).28 is built-in alarm device, sends warning signal by central control circuit 6 ends (PIEZO).Among the figure 1 end be battery just, O is that battery is negative.

Centring control and ignition control circuit 30 comprise central process unit 31, relay drive circuit 32, with external sounding component bonded assembly sound driving circuit 33 and in connect alarm element bonded assembly alarm amplifying circuit 34.

When signal receiving circuit detects pressure variation or battery change in pressure drop, the PRESS end (4 end) of central process unit has the signal input, then by FLASH (5 end), PIEZO (6 end) control flash of light and alarm, the power supply of control relay driving circuit point of cutoff fire coil feed circuit 40 simultaneously, control external, built-in warning circuit 33,34 and drive alarm element actions such as the sound, related built-in alarm device can be that the lamp alarm also can be the light alarm by the free decision of user.

Referring to Fig. 4, be the enforcement circuit diagram of signal reception among Fig. 3 and flash of light warning circuit 20, infrared ray receiving demodulation decoder circuit is a major part with integrated IRD1 PIC-12043LM, output decoded signal CODE (3).Air pressure induction and detector adopt PS1AS102, resistance R 3, R4 stabilivolt Z2 and integrated IC2 (GL358) etc. constitute cell pressure down detection circuit and driving circuit, outputting alarm control signal PRESS (4), aerotron Q1, Q2 (9014C) and light-emitting diode L1, L2 etc. constitute LED driving circuit, when LEDS end (2 end) had the control signal input, Q1, Q2 alternate conduction were ended, L1, L2 are alternately glittering.Aerotron Q3, Q4, Q5, Q6, voltage transformer T1, T2, controllable silicon SCR 1 and la lampe 1 etc. constitute flash lamp circuit, and being linked in sequence by oscillator, booster circuit, thyristor gating circuit constitutes, when FLASH (5) end has the control signal input, the Q4 conducting, the work of control flash lamp circuit.When P1EZO (6 end) has control signal when input, drive that X1 is a buzzer phone among X1 alarm, the figure, can pass through P1, the P2 two-end-point is external.

Referring to Fig. 5, enforcement circuit for centring control among Fig. 3 and ignition control circuit 30, with central process unit IC3 (PIC16C54XT/P) is core component, aerotron Q2, Q3, Q4 among the figure, voltage transformer T1, T2 etc. constitute the alarm boost pressure circuit, make PIEZO (6 end) and P3, P4 output have enough power to remove to drive built-in alarm device.The collector connection relay coil of aerotron Q6 (RELAY COIL) drives the actuating of relay, makes the power supply of point of cutoff fire coil.Aerotron Q8, Q9 are connected into Darlington transistor, and its collecting electrode EXT SIREN connects outside squealer and sends alarm call.7,8 (SPARE IGNITION INTERLOCK) are the backup ignition interlock among the figure.Aerotron Q5, Q7 etc. constitute mu balanced circuit.

Car Burglar Alarm of the present utility model can be made into three parts when implementing, comprise the remote controller of carrying, and fixes on receiving alarm device on the driver driving platform and the battery case of being located under a concealment part such as the bearing circle in the automobile with the double faced adhesive tape cementation.Leave before the automobile and remote controller to be aimed at the receiving alarm device across vehicle glass press emission and make by strong S1 and be in the warning alarm status, again remote controller is aimed at the receiving alarm device across vehicle glass when returning and press emission button S1, make to remove and guard against alarm status.When the warning alarm status, light-emitting diode alternately flicker and the indication of the several times sound are arranged, when removing the warning alarm status, then flicker stops to transfer to the normal bright and once indication of ringing of a lamp.

The utility model adopts multiple advanced person, rational antitheft detection technique and scientific and effective secrecy provision, makes car alarm dependable performance, easy to use, flexible operation.

Claims (3)

1, a kind of car alarm, comprise the far-end control device of launching code signal and the receiving alarm device that constitutes by code signal receptor, robber's car sensing receptor, central processing unit, the relay drive circuit of control ignition coil power supply, acoustic alarm, visual alarm, it is characterized in that:

Described robber's car sensing receptor comprises baroceptor and the air pressure sensing testing circuit thereof that induction automobile internal gas pressure changes, detect cell pressure down detection circuit and driving circuit that cell pressure descends, baroceptor, air pressure sensing testing circuit and driving circuit are linked in sequence, the output of cell pressure down detection circuit connects the input end of driving circuit, and driving circuit output connects an input port of described central processing unit;

Described visual alarm is the flash lamp circuit that is linked in sequence and is constituted by oscillator, booster circuit, thyristor gating circuit and flash light, and the input control end of flash lamp circuit connects a delivery port of described Central Processing Unit (CPU).

2, car alarm according to claim 1 is characterized in that:

Described far-end control device is linked in sequence by password preselected circuit, coding and modulation circuit and infrared transmitter and constitutes; Described code signal receptor is an infrared ray receiving demodulation demoder, and the output of infrared ray receiving demodulation demoder connects an input port of described central processing unit.

3, car alarm according to claim 1 is characterized in that:

Comprise that also one is used for the LED driving circuit that password receives demonstration, LED driving circuit input control end is connected with a delivery port of described Central Processing Unit (CPU).

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