CN2185704Y - Theft-proof alarm device for motor-driven vehicle - Google Patents

Abstract

The utility model discloses a theft-proof alarm device for motor vehicles, which comprises an alarm disarming device 1 which is composed of an encoder and an infrared code emitter, an infrared code receiver 2, a decoder 3, a pulse detector 4, a key position key voltage detector 5, a multiplex electronic switching circuit 6, a misfire and alarm tone controller 7, an alarm tone signal generator 8, an OR gate and time delay holding circuit 9, etc. When whoever except the owner of a motor vehicle starts the key position switch, the starting ignition of the motor vehicle fails, and an acoustic horn sounds for a long time. The utility model with the advantages of simple structure, convenient operation, low cost, and high reliability can be used for anti-theft alarm of motor vehicles.

Description

Theft-proof alarm device for motor-driven vehicle

The utility model relates to warning device, and more particularly, the utility model relates to the antitheft alarm system of automobile-use.

The antitheft alarm system of reporting in the various documents and materials, sell on the market is of a great variety, the usefulness that also can be used as the self-propelled vehicle warning that wherein has.Its weak point is, the complex structure that has, costs an arm and a leg; The then user who has uses trouble, inconvenience; Flase alarm, poor reliability then easily take place in what have.

The purpose of this utility model is to overcome shortcoming of the prior art, and a kind of simple in structure, easy operating, easy to use, motor vehicle antitheft warning device that reliability is high and with low cost are provided.

Formation of the present utility model is summarized as follows:

The utility model comprises the de-warner ［ 1 ］ that is made of coder and infrared ray code generator, infrared line code receptor ［ 2 ］ demoder ［ 3 ］, and described demoder ［ 3 ］ connects pulse detector ［ 4 ］; Pulse detector ［ 4 ］ also connects key position switch piezoelectric detector ［ 5 ］, multiplexer electronic switching for space ［ 6 ］ respectively; Key position switch piezoelectric detector ［ 5 ］ also connects contact, fire extinguishing position, cold run and the alert sound controller ［ 7 ］ and the multiplexer electronic switching for space ［ 6 ］ of source switch in the key position switch ［ 10 ］ respectively; Multiplexer electronic switching for space ［ 6 ］ also connects respectively or door and time-delay lock-out circuit ［ 9 ］, cold run and alert sound controller ［ 7 ］; Also receive a crime report the respectively contactless ignition of ignition lock in sound signal generator ［ 8 ］, the key position switch ［ 10 ］ of cold run and alert sound controller ［ 7 ］; Or door and time-delay lock-out circuit ［ 9 ］ also connect the contactless ignition of source switch in the key position switch ［ 10 ］.

Key position switch piezoelectric detector of the present utility model ［ 5 ］ also can be connected with tilting of car body detector ［ 11 ］ respectively with the fire extinguishing contact of the middle source switch of key position switch ［ 10 ］, and described pulse detector ［ 4 ］ and key position switch piezoelectric detector ［ 5 ］ are the best to adopt each 556 time meter of 1/2nd as univibrator.In described or door and time-delay lock-out circuit ［ 9 ］ or door also can connect the oil level contact of source switch in the key position switch ［ 10 ］.Described alert sound signal generator ［ 8 ］ preferably adopts the horn trumpet of self-propelled vehicle.

The utility model will be further described below in conjunction with accompanying drawing and embodiment.

Fig. 1 is that the circuit of the utility model warning device constitutes block diagram;

Fig. 2 is the circuit diagram of de-warner ［ 1 ］, infrared line code receptor ［ 2 ］ and the demoder ［ 3 ］ of the utility model warning device;

Fig. 3 is the circuit diagram of the utility model warning device remainder.

In Fig. 2, de-warner ［ 1 ］ is by coder integrated circuit MC145026, infrared ray diode D5 and D6, single key stroke K switch 4, resistance R 17, R18, R19, and capacitor C 9 is formed.De-warner ［ 1 ］ can provide nearly 20,000 different codings, and it is fixed that the sign indicating number type is put by the different coupled condition of address end A1～A9 of MC145026.Infrared line code receptor ［ 2 ］ is made up of infrared ray aerotron BG5 and resistance R 14.Demoder ［ 3 ］ is made up of integrated circuit MC145028, resistance R 15, R16 and capacitor C 7, C8.The coupled condition of address end A1～A9 of MC145028 should be with coder identical; Resistance R 15, R16 and capacitor C 7, C8 also will have definite cooperating with coder.

In Fig. 3, the monostable that pulse detector ［ 4 ］ is connected into by 1/2nds timers triggers and clamors 2, aerotron BG1 and resistance R 4, R5 form.Key position switch piezoelectric detector ［ 5 ］ is made up of univibrator 1 and diode D7, resistance R 20 that another 1/2nds timer is connected into.Multiplexer electronic switching for space ［ 6 ］ is made of 4066 integrated circuit.Cold run and alert sound controller ［ 7 ］ be by aerotron BG2, BG3, BG4, relay J 1 and J2, and diode D3 and D4, controllable silicon SCR, resistance R 8, R9, R10, R11, R12, R13 form.That this enforcement is adopted is two hilted broadsword relay J 1 and J2, also can adopt a two keys relay certainly.Alert sound signal generator ［ 8 ］ adopts the vehicle loudspeaker of blowing a trumpet.Or door is made up of diode D1 and D2, resistance R 6, R7, capacitor C 6 with time-delay lock-out circuit ［ 9 ］.Key position switch ［ 10 ］ is the startup and the fire extinguishing switch of vehicle.Tilting of car body detector ［ 11 ］ is made of mercury switch K3.

Introduce principle of work of the present utility model and method of operation below, so that the utility model is done more deep understanding.

The key position switch of vehicle itself ［ 10 ］ is made up of the gang switch SW1 and the SW2 of three of two double-poles (or two) usually.Ignition position shows that vehicle is to start or running state, at this moment Vehicle Power process or door and time-delay lock-out circuit ［ 9 ］ add to the 13rd pin of multi-channel electronic switch ［ 6 ］, cause its 1st pin and 2 pin to be connected, power line voltage adds to the 6th pin of 556 integrated circuit, be stabilized conditions by 1/2nds univibrators of forming like this, its mouth the 5th pin is a low level, the controllable silicon SCR blocking-up, BG3, BG4 in cold run and the alert sound controller ［ 7 ］ end, relay J 1 and J2 do not work, and warning device is non-alarm condition.

Behind the vehicle parking, the switch contact of key position switch ［ 10 ］ places fire extinguishing position because or the effect of door and time-delay lock-out circuit ［ 9 ］, the contact is in switching process, the 6th pin that still can keep integrated circuit 556 is a high level, univibrator 1 is a stabilized conditions.In the fire extinguishing position, power supply adds to 556 the 6th pin through R20, diode D7, and by above-mentioned as can be known described, univibrator 1 is a stabilized conditions, and whole warning device is in non-alarm condition.

When non-car owner dials key position switch ［ 10 ］ to ignition position, because or the time-lag action of door and time-delay lock-out circuit ［ 9 ］, the 13rd pin voltage that adds to multi-channel electronic switch ［ 6 ］ can not instantaneously be set up, and promptly adding to 556 the 6th pin voltage by multi-channel electronic switch ［ 6 ］ can not instantaneously set up.And when key position switch ［ 10 ］ leaves the fire extinguishing position, 556 the 6th pin voltage reduces to zero, and monostable 1 upset is unsteady state, and its 5th pin becomes high level, SCR is triggered and conducting, power line voltage is by its 10th pin, through the 11st pin, and controllable silicon SCR and resistance R 11, R12 adds to the base stage of aerotron BG3 and BG4 respectively, cause their saturation conductions, relay J 1 and J2 adhesive, its corresponding contact switch K1 and K2 swing to ground state.K2 moving contact ground connection makes the horn for vehicle energising and sends the loudspeaker chimes of doom, and K1 moving contact ground connection makes vehicle ignition device ground connection, causes cold run.According to the triggering and conducting characteristic of controllable silicon SCR, this warning will not be subjected to monostable trigger to turn to stable state by unstable state and change.

When the car owner starts vehicle, should press the single key stroke switch SW 4 of de-warner ［ 1 ］ earlier, and the infrared ray window that makes de-warner ［ 1 ］ shines the infrared ray aerotron BG5 of infrared receiver ［ 2 ］, demoder this moment ［ 2 ］ will be exported the positive alert pulse of separating, and pass through the 8th pin that 556 integrated circuit are delivered in aerotron BG1 paraphase, that is the trigger end of univibrator 2.The result, the univibrator upset becomes unstable state, and 556 the 9th pin becomes high level, and 4066 the 5th and the 6th pin is a high level simultaneously, power supply can add to 556 the 6th pin through 4066 the 9th and 8 pin, and then transfers ignition position with car key startup key position switch to by the fire extinguishing position.Leave when position fire extinguishing at key position switch, because 556 the 6th pin are added with high level earlier, so univibrator 1 can not triggered and overturn, and annunciator is not reported to the police.Also can find out by figure, separate alert pulse and also have and make device get back to the function of non-alarm condition fast by alarm condition.When the car owner send separate alert instruction after, 556 integrated circuit 2 are subjected to trigger upset, 556 the 9th pin becomes high level, 4066 the 5th, 6 pin also become high level, power supply by its 3rd, 4 pin to C1 fast charge (if this moment monostable 1 be in astable words), make monostable 1 get back to stable state rapidly, 556 the 5th pin is low level; Simultaneously because the paraphase of aerotron BG2, make 4066 the 12nd pin become low level, the electronic switch blocking-up between the 10th, 11 pin, controllable silicon SCR loses supply current and is blocked, thereby causes BG3, BG4 to end, relay J 1 and J2 blocking-up, warning stops.

When the utility model is used for motor bike, also can on the node between R20 and the diode D7, insert mercury switch K3 to ground, its effect is that the theft mode of moving car body is reported to the police.When motor bike was moved, K3 connected, the positive ground of diode, and causing 556 the 6th pin is low level, univibrator 1 is triggered and overturns, thereby reports to the police.Such circuit connecting mode only makes K3 work when stopping the fire extinguishing position, and inoperative when operation, this is because the buffer action of diode D7.

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

1. simple in structure, be easy to make, be easy to use.

2. the reliability height is difficult for producing false alarm.

3. with low cost, be easy to apply.

Claims (5)

1, a kind of antitheft alarm system of automobile-use comprises the de-warner [1], infrared line code receptor [2] and the demoder [3] that are made of coder and infrared code emitter, and its technical characterictic is that described demoder [3] connects pulse detector [4]; Pulse detector [4] also connects key position switch piezoelectric detector [5], multiplexer electronic switching for space [6] respectively; Key position switch piezoelectric detector [5] also connects contact, source switch fire extinguishing position, cold run and alert sound controller [7] and the multiplexer electronic switching for space [6] in the key position switch [10] respectively; Multiplexer electronic switching for space [6] also connects respectively or door and time-delay lock-out circuit [9], cold run and alert sound controller [7]; Also receive a crime report the respectively contactless ignition of the ignition lock in sound signal generator [8], the key position switch [10] of cold run and alert sound controller [7]; Or door and time-delay lock-out circuit [9] also connect the contactless ignition of the source switch in the key position switch [10].

2, antitheft alarm system according to claim 1, its technical characterictic are that described key position switch piezoelectric detector ［ 5 ］ is connected with tilting of car body detector ［ 11 ］ respectively with the fire extinguishing contact of the middle source switch of key position switch ［ 10 ］.

3, antitheft alarm system according to claim 1 and 2, its technical characterictic are that described pulse detector ［ 4 ］ and key position switch piezoelectric detector ［ 5 ］ respectively adopt 1/2nd 556 timers as univibrator.

4, antitheft alarm system according to claim 1, its technical characterictic be, in described or door and the time-delay lock-out circuit ［ 9 ］ or door also connect source switch oil level contact in the key position switch ［ 10 ］.

5, antitheft alarm system according to claim 1, its technical characterictic are that described alert sound signal generator ［ 8 ］ adopts the loudspeaker of blowing a trumpet of self-propelled vehicle.

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