CN2178370Y - Theft-proof alarm device for vehicle - Google Patents

Abstract

The utility model relates to a theftproof and anti-theft alarm device for a vehicle which can be installed on various vehicles and fixed objects. The utility model not only has theftproof alarm function, and a man which is stolen can be reminded to take anti-theft measure timely when the stolen man goes away form the theft site. The utility model is characterized in that a transmitter is installed on the stolen object and is composed of a sensor, a controller, a coding circuit, an emitting electrode and a stabilized voltage supply; a receiver is composed of a host portability receiving circuit, a shaping amplified circuit, a decoding circuit, a control circuit and an alarm circuit. The utility model is suitable to be installed on various vehicles, motorbikes and high-grade bicycles. The utility model can also be installed on the valuables or theftproof gates which are difficult to move.

Description

Theft-proof alarm device for vehicle

The utility model belongs to the anti-alarm technical field of stealing of vehicle anti-theft.

In recent years, increasing along with car, motorcycle, high gear bicycle, the stolen incident of vehicle also increases thereupon, although therefore anti-theft measure also becomes inventor's popular project, the new product of various theftproof locks, burglar alarm and the two combination constantly comes out, no matter but adopt which kind of measure, also only played the effect opening and alarm of being difficult to, the thief that this gets up for " clever " day by day, if not having corresponding anti-robber's measure catches up with, the car owner away from or leave the scene of parking car for a long time, the thief still can go smoothly.

The purpose of this utility model is, provide a kind of car owner of making in time to take counter antitheft anti-robber's alarm of stealing measure, and it is easy for installation to make every effort to make this alarm to have, be easy to carry about with one, simple in structure, superiority such as cost is lower, so that rising of can being equipped with of most of car owner, and can really play effectively antitheft effect.

Now the utility model design and technical solution are described below:

The antitheft anti-robber's alarm of the utility model is formed by being installed on by the transmitter on the monitoring vehicle with by the receiver two large divisions that the guardian carries.The transmitter (see figure 1) is made up of sensor (1) controller (2), scrambler (3), emitting stage (3) and stabilized voltage supply (4) five parts, when sensor (1) is experienced vibration that vehicle produces when stolen or displacement.Export control signal immediately, trigger controller (2), enter duty thereby control other parts, ten thousand sets of numbers surplus scrambler (3) can control 400 transmit in order to control, not disturb mutually between the assurance user.Sensor (1) is a core component of the present utility model, has adopted the piezoelectric type vibration transducer, can guarantee that vehicle is when being subjected to touching, output alarm signal immediately, once invade termination outward, signal also stops output, therefore makes the guardian can judge in time whether vehicle is subjected to stolen threat.The receiver (see figure 2) is made up of receiver (6), shaping amplifier, demoder (8), control (11) and audible alarm (10) five parts.After the alerting signal that wireless receiving sends to transmitter, export restituted signal at receiving unit (6) through efficient, mixing, intermediate frequency filtering, amplification, amplitude limit, frequency discrimination, after the shaping processing and amplifying, deliver to demoder again, the coded signal that demodulates goes to control sonic alarm, sends audible alarm so that make the people in time take the anti-measure of stealing.

Existing combined circuit figure is described the concrete technical solution of the utility model.Fig. 3 is the utility model radiating portion circuit theory diagrams, control circuit is by BG4, BG5, BG6 forms, YZ is a sensor, the signal that picks up is coupled to the base stage of BG4 by C15, amplify the back by BG4 and deliver to D1 through C17 from collector, the voltage doubling rectifing circuit that D2 forms is carried out rectification, after C18 filtering by R10,11 dividing potential drops, deliver to the base stage of BG5, make BG5 be tending towards conducting, when the BG6 base potential drops to a certain degree, the BG6 conducting, connected emission, code power, make BG1,2 through IC2 voltage stabilizing dividing potential drop, at this moment IC1 gets, produce coded signal according to the coding that presets, export from " 17 " pin, through R2, C3 sends into oscillator stage and modulates, and modulation signal is added on the collector junction of BG1, causes that the variation of junction capacity reaches the purpose of frequency modulation, through the high-frequency signal of ovennodulation by C5, L1 filters harmonic wave, be coupled to two frequency multiplier circuits of forming by BG2 through C8 and carry out the frequency multiplication amplification, by C10, L2 selects two frequency multiplication useful signals, leaches to be coupled to BG3 Class C power amplifier by L3 behind the unnecessary harmonic wave and to carry out power amplification, by L4, after C1 selects useful signal and filters surplus harmonic wave, be coupled to antenna through C14 and send out.

Fig. 4 is the utility model receiving unit circuit theory diagrams, the high-frequency signal that antenna induction goes out is coupled to IC3 by C16 and carries out the high frequency amplification, frequency conversion, after intermediate frequency amplifies frequency discrimination filtering, export by " 2 " pin, C8 filtering multifrequency nubbin, deliver to IC1a " 3 " pin through R9, the remaining high frequency of C7 filtering simultaneously, after amplifying, IC1a delivers to R by " 1 " pin, C is coupled to the VR upper end, after the VR dividing potential drop, send into IC1b " 5 " pin and carry out the shaping amplification second time, pass through R2, C2 is coupled to IC2's " 14 " pin and decodes, if with reception preset the sign indicating number not simultaneously, no-output then, if differentiating through four times, IC2 inside confirms that errorless mistake " 17 " pin will become high level (being low level by high level when using the UM350 integrated package) from low level and make BG1 be tending towards conducting, when the current potential of BG2 base stage also rose to high level to certain value, BG2 is saturation conduction also, and YMD gets the electric chimes of doom that sends.

Now that description of drawings is as follows:

Fig. 1: the utility model radiating portion theory diagram.

Fig. 2: the utility model receiving unit theory diagram.

Fig. 3: the utility model radiating portion circuit theory diagrams.

Fig. 4: the utility model receiving unit circuit theory diagrams.

Wherein: (1) Sensor section (2) control section (3) radiating portion

(4) stabilized voltage supply (5) coded portion (6) receiving unit

(7) (8) decoded portion (9) power supply is amplified in shaping

(10) audible alarm (11) control section

The utility model is compared with prior art, has the following advantages:

1) code capacity is big, can reach 400 surplus ten thousand groups, this can satisfy the demand basically for big, a medium city;

2) in the state of alert, transmitter has only partial circuit in work, so power consumption is few;

3) receiver adopts micro module, and volume is little, and is in light weight, is easy to carry;

4) receiver adopt the work of special-purpose monolithic FM reception integrated circuit, reliable, debugging is simple,

5) surely covering property is strong during alarm work, not only can be antitheft, and the function that catches a thief;

6) except that the minority key element, adopt general part, can reduce cost.

Development along with China's communication, increasing of vehicle, especially motorcycle, high gear bicycle develop rapidly, the antitheft anti-task of top priority that surreptitiously just becomes, broad masses urgently wish to have a kind of inexpensive antitheft anti-alarm of stealing to come out, and the every cover of the utility model product also has only dozens of yuan, and is with low cost, all can be equipped with on each car, its market outlook and economic benefit, social benefit are conspicuous.

Claims (2)

1, the anti-alarm of stealing of a kind of vehicle anti-theft has transmitter and receiver, it is characterized in that: transmitter is by sensor, and control circuit, scrambler, emitting stage and stabilized voltage supply are formed; Receiver is by receiving circuit, shaping amplification circuit, and decoding circuit, control circuit and warning circuit are formed.

2, the anti-alarm of stealing of vehicle anti-theft according to claim 1, it is characterized in that: the control circuit of transmitter is made up of triode BG4, BG5, BG6, capacitor C 15, C17, two utmost points and D1, D2, resistance R 10, R11; The collector of BG5 connects the base stage of BG6; Coding is finished by ic chip 1; Frequency modulation is joined frequently and is amplified, and power amplification is finished by triode BG1, BG2, BG3; Be connected to inductance L 2, L3 between BG2 and the BG3; The high frequency of receiver, frequency conversion, in put, frequency discrimination is finished by ic chip 3, from " 2 " pin output low frequency signal, amplifies shaping by IC1a, IC1b, sends into ic chip 2 decodings through R2, from " 17 " pin output signal, control BG1, BG2 send alerting signal.

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