CN2056136U

CN2056136U - Multi-azimuth burglar alarm for vehicle

Info

Publication number: CN2056136U
Application number: CN89205440U
Authority: CN
Inventors: 朱华锷; 许伟健
Original assignee: Individual
Current assignee: Individual
Priority date: 1989-10-19
Filing date: 1989-10-19
Publication date: 1990-04-18

Abstract

The utility model relates to a multi-azimuth burglar alarm for a vehicle, which is used for the burglar alarm of a vehicle, such as a bicycle, a motorcycle, etc. The utility model is mainly composed of a sensing part, a switch part, an audio generator and a sound production component, wherein, the sensing part has two sets of leading wires which are mutually independent, and the two sets of leading wires are respectively connected to two parts of a vehicle. When a loop formed from any leading wire of the two sets of leading wires is damaged, the leading wires form short circuit with a vehicle body and form self open circuit, the alarm can send alarm in time, and the danger that a vehicle is stolen is effectively prevented. The alarm has the advantages of small size, light weight, low cost and reliable working, and the utility model can be widely used for various vehicles.

Description

Multi-azimuth burglar alarm for vehicle

The utility model is a kind of warning device that vehicle anti-theft alarms such as bicycle, motor bike are used that is used for, and belongs to the technical field of home electronics.

Bicycle, electric assisted bicycle, motor bike etc. all are equipped with mechanical lock at present, when this lock is pried open by other people, the effect of lock has also just lost, and the car owner can't know that also the car of oneself stolen by other people, owing to these reasons, though each one car all is equipped with mechanical lock, but all can not prevent the lawbreaking activities of stealer, so,, all can not fundamentally solve the behavior of stealing of preventing although occur the lock that a kind of another mechanical strength is strengthened on the market.

Goal of the invention of the present utility model is exactly that practical problems at above existence designs, thereby made the multi-faceted burglar alarm of a kind of vehicle, it has been installed on the vehicle, when the behavior of stealing this vehicle takes place, it can in time send warning, thereby makes the safety of vehicle that guarantee arranged.

The multi-faceted burglar alarm of vehicle of the present utility model mainly is made up of sense line part, electronic switch part, audio-frequency generator and pronunciation part.Switch sections is with operational amplifier A ₁Be core, its in-phase input end is connected on the mid-point voltage between power supply and the ground, promptly is connected on two 510k resistance R between power supply and the ground ₃, R ₄Between, its reverse input end is connected on resistance R ₁With R ₂Between, simultaneously, also be connected to two diode D between two input ends of this op amp ₁, D ₂, these two diode headtotails are attempted by operational amplifier A ₁Two input ends between, operational amplifier A ₁Two power ends pass through resistance R respectively ₅And resistance R ₆Link to each other with power supply.One of invention characteristics of the present utility model are to utilize resistance R ₁To operational amplifier A ₁The line L of backward end ₁And resistance R ₅To operational amplifier A ₁The line L of power end ₂Make sense line, saved the sensor in the common annunciator.Operational amplifier A ₁Mouth by a resistance R ₇With driving transistors T ₂Base stage link to each other transistor T ₂Collecting electrode by a resistance R ₉Join with power supply, simultaneously also direct the and relay J of its collecting electrode ₁Current coil link to each other relay J ₁The other end of current coil is by its open contact J _1-1Join with power supply.In addition, at open contact J _1-1Two ends also and meet a reset switch K ₁

Audio-frequency generator is served as by integrated circuit " 9541 ", its Q ₁End and Q ₂Be connected to a resistance R between the end _*The resistance that changes this resistance can change the frequency of its pronunciation, at the O/P of this integrated circuit end, by a resistance R ₈With driving transistors T ₁Base stage link to each other, this transistorized grounded emitter, collecting electrode is that loudspeaker link to each other with power supply by pronunciation part, wherein the power supply of pronunciation part and integrated circuit " 9541 " is by relay J ₁Normally closed contact J _1-2Control, i.e. J _1-2A direct power connection, the other end joins with integrated circuit " 9541 " and pronunciation part respectively.

Principle of work of the present utility model and working process are:

Beginning, operational amplifier A ₁Both-end input by behind the electric resistance partial pressure, make it be output as high level, transistor T ₂Saturation conduction, J ₁Electricity and self-locking are arranged, its normally closed interlock J _1-2Open, the pronunciation part of annunciator is mute.When sense line has signal input, i.e. short circuit, open circuit or link to each other.At this moment, changed operational amplifier A ₁The input state of equilibrium, making its mouth is low level by the high level saltus step, through aerotron T ₂After anti-phase, its current collection is high level very, and at this moment, the two ends of relay current coil are high level, and therefore, relay discharges, and its normally closed contact closes, alarm equipment alarm, and open contact is opened, and loses the self-locking state to relay.After the warning because reset switch do not close, therefore, though eliminated " fault " (being about to sense line restores to the original state) at this moment annunciator also reporting to the police the reset switch k that will often lock until the car owner always ₁Close, at this moment could eliminate warning.

Advantage of the present utility model is that this annunciator structure is very simple, volume is little, in light weight, and cost is also lower, but its performance is all very good.At first structurally saved the sensor in the common annunciator, replaced with circuit connection lines.In use, sense line is passed from wheel, connect then, what way the people who no matter steals vehicle adopts steal car, as long as sense line is broken, or and ground (being vehicle body) between short circuit etc., annunciator all can send warning, and if sense line is not broken out, wheel can't rotate, so guaranteed the safety of vehicle.

Fig. 1 is schematic circuit diagram of the present utility model.

Embodiment of the present utility model is as follows: all circuit component all is contained on the printed circuit board, and in the box of packing into, with sense line L ₁, L ₂Draw operational amplifier A ₁The model that adopts is " CA3094 " transistor T ₁And T ₂Be respectively " 3DG12 and 3DG6 ", relay J ₁Model be " 4100 ", power line voltage is 3V, reset switch K ₁Be switch with lock, this switch with lock be one can not self-sustaining reset switch, according to the above, just can produce the multi-faceted burglar alarm of vehicle of the present utility model.

Claims

1, a kind of vehicle anti-theft annunciator is made up of institutes such as Sensor section, processing of circuit parts, it is characterized in that this annunciator is made up of transducing part, electronic switch part, audio-frequency generator and pronunciation device, and transducing part is with two sense line L ₁And L ₂Replace common sensor; The electronic switch part is mainly by operational amplifier A ₁, transistor T ₂, relay J ₁Form, the mouth of its op amp is by resistance and transistor T ₂Base stage link to each other transistor T ₂Collecting electrode directly and relay J ₁Current coil join; Audio-frequency generator is served as by integrated circuit " 9541 ", its Q ₁With Q ₂Be connected to one between the end only to change the resistance R of pronouncing frequency _*

2, the multi-faceted burglar alarm of vehicle according to claim 1 is characterized in that described sense line L ₁A connecting resistance R ₁, the other end connects operational amplifier A ₁Reverse input end, sense line L ₂A connecting resistance R ₃, the other end connects operational amplifier A ₁Power input.

3, the multi-faceted burglar alarm of vehicle according to claim 1 and 2 is characterized in that in relay J ₁Open contact J _1-1Two ends also are connected to a reset switch K ₁, this K switch ₁Be one can not self-sustaining reset strap lock-switch.