CN2530847Y

CN2530847Y - Anti-theft device for vehicles

Info

Publication number: CN2530847Y
Application number: CN02225581U
Authority: CN
Inventors: 刁加文
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-02-05
Filing date: 2002-02-05
Publication date: 2003-01-15
Anticipated expiration: 2012-02-05

Abstract

The utility model relates to an anti-theft device for vehicles for preventing breaking interlink of major-minor machines, which belongs to an anti-theft alarm device. The utility model comprises a major machine provided with a long-wave band emitter, a remote controller, a minor machine (s long-wave band acceptor) which are connected with each other by receiving and dispatching radio wave signals. The long-wave band emitter is connected with a low-frequency signal generator, a buffer, a modulation oscillator and a long-wave band transmitting circuit by respective signal line. The long-wave band acceptor is connected with a receiving circuit, a phase-locked loop decoder, the buffer, an alarming horn and executive components by the respective signal line and a power line. The utility model adds the interlink anti-theft function, so the anti-theft and alarm can be realized after the major machine and the circuit are broken. The minor machine has cabinet volume and easy concealment and installation, so burglars are impossible to break the device in a short time. The major machine is connected with the minor machine by receiving and dispatching the radio wave, so the connecting circuitry can not be broken. The utility model has the advantages of simple circuitry structure, low cost and superior price ratio.

Description

The a chain of tamper-proof car alarm of major-minor machine

(1) technical field:

The utility model is a chain of tamper-proof car alarm of major-minor machine, belongs to the anti-theft alarm technical equipment.

(2) background technology:

Existing various car alarms have all just lost anti-theft alarm function after cutting off host power supply circuit or the destroyed dismounting of main frame at present.Enter operator's compartment for the burglar by sled automobile door glass or picking lock, cutting host line or dismounting main frame are easy to do things, in case this thing happens, automobile just loses anti-theft alarm function, just take place stolen easily.

(3) summary of the invention:

The purpose of this utility model is exactly to have the car alarm main frame now and circuit is cut off, removes destruction easily in order to overcome and to solve, make automobile lose anti-theft alarm function, easy stolen etc. shortcoming and problem, research and design is a kind of to be need not circuit and connects, and the volume that increase transmitting/receiving wireless electricity long wave device, has an a chain of warning function is small and exquisite, be convenient to be installed on hidden place in the car, be difficult for being found and removing a chain of tamper-proof car alarm of major-minor machine of destruction.

The utility model is realized by following technical proposals: the profile unitized construction scheme drawing of the tamper-proof car alarm of major-minor machine connection ring as shown in Figure 1; The ratio long wave section transmitter circuit block scheme that is increased in the original host as shown in Figure 2, secondary machine, be ratio long wave section acceptor circuit block scheme as shown in Figure 3, the schematic circuit diagram of one of its ratio long wave projector embodiment as shown in Figure 4, secondary machine, promptly the schematic circuit diagram of one of embodiment of ratio long wave receptor as shown in Figure 5.It is connected by transmitting/receiving wireless electricity electric wave signal jointly by remote controller 2, the ratio long wave section receptor 3 of the main frame 1 of host printed circuit board that includes former car alarm and the ratio long wave section transmitter line plate that increases newly, former car alarm and constitutes; Wherein: ratio long wave section transmitter circuit is connected and composed jointly by low frequency generator 4, energy disperser 5, modulating oscillator 6, long-wave band transmission circuit 7, and its interconnected relationship is: energy disperser 5 is electrically connected with low frequency generator 4, modulating oscillator 6 respectively mutually by low frequency signal output line, low frequency buffering signals line respectively; Long-wave band transmission circuit 7 is electrically connected formation with modulating oscillator 6, antenna respectively mutually by modulating oscillation signal wire (SW), the line that transmits respectively; Each circuit of whole ratio long wave section projector is connected with the original host voltage-stabilized power supply circuit respectively by power lead; Wireless long-wave band acceptor circuit is connected and composed jointly by acceptor circuit 8, phaselocked loop demoder 9, energy disperser 10, alarming horn 11, execution unit 12, and its interconnected relationship is: acceptor circuit 8 is electrically connected with receiving wire, phaselocked loop demoder 9 respectively mutually by signal input line, received signal output line respectively; Energy disperser 10 is electrically connected with lock lock ring demoder 9, alarming horn 11, execution unit 12 respectively mutually by phase-locked decoded signal line, alerting signal line, execution signal wire (SW) respectively; Wireless each circuit of long-wave band receptor is connected with battery supply respectively by power lead respectively.Wherein: low frequency generator 4 connects and composes LFO jointly by phase inverter integration member IC1, IC2, resistance R 1, R2, capacitor C 1; Energy disperser 5 is made of phase inverter integration member IC3; Modulation oscillator 6 is connected and composed jointly by resistance R 3, aerotron Q1; Long-wave band transmission circuit 7 is connected and composed jointly by modulation concussion inductance L 1, capacitor C 2, resistance R 4; The resonant tank that acceptor circuit 8 is connected and composed jointly by inductance L 2, capacitor C 3 and aerotron Q2, Q3, resistance R 2～R8, capacitor C 4～C6 are electrically connected jointly and constitute; Phaselocked loop demoder 9 is electrically connected jointly by integration member IC4, resistance R 9～R10, capacitor C 7～C9 and constitutes; Energy disperser 10 is made of aerotron Q4; Alarming horn 11 and execution unit 12 are made of loudspeaker S and relay J 1, J2.

Style of work principle of the present utility model: its groundwork be secondary machine away from annunciator and with the ingenious combination of former car alarm, realize a chain of anti-theft alarm function.This burglar alarm adopts the transceiving technology, installs long-wave band (about 150KHZ) transmitting set in main frame additional, and its emissive power is effective in 10 meters of milliwatt levels.Owing to work in the long wave frequency range, can not cause interference to other electrical equipment in the car, also be difficult to be disturbed by other electrical equipment, miniature long-wave band receptor is installed in the shelter arbitrarily in car.When the main frame normal operation, receptor is received the long-wave signal that main frame is launched, by signal conditioning, and long-wave band receptor output low level, alarming horn and execution unit are inoperative.When host power supply was cut off or removes, secondary machine promptly worked.Because the long-wave band receptor do not receive the long-wave signal that main frame sends, through processing of circuit, receptor output high level drives alarming horn and reports to the police, and drives execution unit and make the car engine outage, and reaches a chain of theft-proof purpose.Because receptor is by radiowave and main frame contact, be connected without any circuit with main frame, and its volume is very little, can be installed on any concealment part in the automobile, even can be loaded in the instrument carrier panel or the bearing circle strut bar in, the criminal is difficult to find the receptor installation site at short notice and destroys.Remote controller is identical with common Car Burglar Alarm with the connection of main frame, is connected by the transmitting/receiving wireless electric wave.The utility model can be installed among any type of car alarm.Burglar alarm in the host circuit is constant substantially, only increases the projector of the long wave frequency range of separate branches, and frequency is 150KHZ, power milliwatt level.Whole long wave projector is installed in the main frame.Secondary machine is a receptor, is a compact electronic device, reaches a chain of theft-proof purpose by receiving the long wave radio ripple with control alarming horn and cut-off relay.Determine the mode of operation of alarming horn and execution unit according to the output signal of receptor, L2 in the long wave receiver and C3 receive and transmit, after frequency-selecting, amplification and demodulation, send into Phase Lock Loop IC 4, adjust resistance R 10, make it accurately receive the 10KHZ signal, treated by 8. output low level of pin.Removal transmits, and acceptor circuit does not receive the radiowave that projector sends, and makes the phaselocked loop demoder IC4 can not normal decoder, and it is pin output high level 8., and loudspeaker S is reported to the police, and relay J 2 is cut off the car engine circuit, and the burglar can't be committed a crime.

The utility model is just added long wave frequency range transceiver in original car alarm, compare with existing Car Burglar Alarm, have the following advantages and beneficial effect: the general volume of (1) common Car Burglar Alarm main frame is all bigger, be installed on below the Automobile instrument, the burglar enters operator's compartment by the window of forcing open the door, and is easy to dial remove host power supply and commit a crime.The utility model is directed to this and has increased a chain of anti-theft feature.Even the cut-out host circuit, even main frame is destroyed, secondary machine still can play the anti-theft alarm effect, and the burglar still can't start automobile; (2) long-pending small and exquisite because of secondary body of the present utility model, easy hidden installation makes the burglar be difficult to destroy simultaneously at short notice main frame and secondary machine; (3) secondary machine is connected by radiowave with main frame, can needn't stick to certain privileged site by car owner's random installation any position on car, makes the burglar be difficult to find; (4) the utility model circuit is simple, cheap, installation is easy, cost performance is superior.

(4) description of drawings:

Below Figure of description is further specified as follows: Fig. 1 is the utility model---the profile unitized construction scheme drawing of a chain of tamper-proof car alarm of major-minor machine; Fig. 2 is the ratio long wave section transmission circuit block scheme that increases in the original host; Fig. 3 is its ratio long wave section acceptor circuit block scheme; Fig. 4 is the schematic circuit diagram of one of ratio long wave section projector embodiment; Fig. 5 is the schematic circuit diagram of one of its ratio long wave section receptor embodiment.Among the figure: the 1st, main frame of the present utility model, the 2nd, its remote controller, the 3rd, its receptor.

(5) concrete embodiment:

The contriver thinks that realization optimal way of the present utility model can be as follows: (1) is by shown in Figure 1, the remote controller 2 of choosing existing car alarm 1 and using, for example main frame 1 can be selected the remote controller 2 of digital type car alarm and corresponding same model thereof for use; Select for use engineering plastics to adopt the shell of injection moulding process injection molded ratio long wave receptor 3; (2) according to Fig. 2 and shown in Figure 4, draw printing wireless electricity long wave transmitter circuit board, rescreen select element install and be fixed on the pcb board of original host or the components and parts direct mount of screening on original host pcb board limit, the optional CD4011 type of IC1～IC3 for example; Aerotron Q1 optional 9013; (3) press Fig. 3 and shown in Figure 5, draw ratio long wave section receiver printed circuit board, rescreen and select components and parts that connection is installed, for example optional 9013 types of aerotron Q2, Q3; The optional LM567 type of IC4 phaselocked loop demoder; The chip loud speaker of optional high resistant 600 milliwatts of alarming horn; The optional HLS-CMA3 type of execution unit J1, J2 relay; No matter ratio long wave section projector, or ratio long wave section receptor, their all components and parts are preferably selected SMD components and parts for use, so that volume of the present utility model is reduced to minimum.After above-mentioned ratio long wave section projector and receptor install, power up, just can implement the utility model preferably through simple debugging.It should be noted that ratio long wave section projector of the present utility model is the derived circuit of whole car alarm, must power with same power supply with original host, and preferably be assemblied on the same pcb board; And ratio long wave section receptor is a self contained system, can not power with the same power supply of original host, otherwise can not embody its a chain of anti-theft alarm function.But during debugging, must the long wave projector is accurately consistent with the adjustment of receptor frequency, to strengthen its reception, strengthen its a chain of anti-theft alarm function characteristic.

Claims

1, the car alarm that still can report to the police after destroyed of a kind of main frame and circuit is characterized in that: it is by main frame (1), the remote controller (2) of former car alarm, the ratio long wave section receptor of host printed circuit board that includes former car alarm and the ratio long wave section transmitter line plate that increases newly---and secondary machine (3) is jointly by the transmitting/receiving wireless electricity electric wave signal formation that is connected; Wherein: ratio long wave section transmitter circuit is connected and composed jointly by low frequency generator (4), energy disperser (5), modulating oscillator (6), long-wave band transmission circuit (7), and its interconnected relationship is: energy disperser (5) is electrically connected with low frequency generator (4), modulating oscillator (6) respectively mutually by low frequency signal output line, low frequency buffering signals line respectively; Long-wave band transmission circuit (7) is electrically connected formation with modulating oscillator (6), antenna respectively mutually by modulating oscillation signal wire (SW), the line that transmits respectively; Each circuit of whole ratio long wave section projector is connected with the original host voltage-stabilized power supply circuit respectively by power lead; Wireless long-wave band acceptor circuit is connected and composed jointly by acceptor circuit (8), phaselocked loop demoder (9), energy disperser (10), alarming horn (11), execution unit (12), and its interconnected relationship is: acceptor circuit (8) is electrically connected with receiving wire, phaselocked loop demoder (9) respectively mutually by signal input line, received signal output line respectively; Energy disperser (10) is electrically connected with lock lock ring demoder (9), alarming horn (11), execution unit (12) respectively mutually by phase-locked decoded signal line, alerting signal line, execution signal wire (SW) respectively; Wireless each circuit of long-wave band receptor is connected with battery supply respectively by power lead respectively.