CN201249737Y

CN201249737Y - Automotive anti-theft alarm

Info

Publication number: CN201249737Y
Application number: CN 200820050322
Authority: CN
Inventors: 黄育明
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-07-04
Filing date: 2008-07-04
Publication date: 2009-06-03
Anticipated expiration: 2018-07-04

Abstract

The utility model relates to an automotive anti-theft alarm, which comprises a radio frequency or fingerprint identification module with a power module, an anti-theft alarm module and a starting module. The anti-theft alarm module is respectively electrically connected with the radio frequency or fingerprint identification module, the power module and the starting module, and the radio frequency or fingerprint identification module is also connected with the starting module. The anti-theft alarm module comprises a high-loudness buzzer and a control circuit thereof; wherein, one end of the buzzer is grounded; and another end of the buzzer is connected with a post-engine-starting charging voltage output end through the normally closed contact of a control relay; and the control ends of the relay are respectively connected with a power supply and a triode circuit. The utility model has anti-theft alarm and anti-restarting protection functions; alarm can be automatically stopped when an automobile is legitimately started; after the automobile is parked, the doors and windows of the automobile are automatically closed, the alarm circuit is started, so that the automotive anti-theft alarm can enter into an anti-theft state without being set by the user; and therefore the automotive anti-theft alarm has the advantages of convenience, safety and high reliability.

Description

Automobile anti-theft alarm

Technical Field

The utility model relates to an automobile automatic control and theftproof technical field specifically indicate an automobile burglar alarm with automatic control and automatic burglar alarm function.

Background

At present, the automobile anti-theft means are many, and are roughly divided into a mechanical type and an electronic type, and in practice, the mechanical type and the electronic type are mostly combined for use. The mechanical lock mainly comprises various steering wheel locks, wheel locks and the like, and is easy to be sleeved and unlocked because of being a common mechanical lock head, and has no alarm function. The electronic anti-theft device has complete functions relatively and is more convenient to use. The following disadvantages still remain: manual operation is needed, for example, a remote controller is used for turning on and off the anti-theft state of the electronic anti-theft device, if a user leaves the automobile and forgets to start the anti-theft device of the automobile, the electronic anti-theft device is similar to a nominal one, and the automobile is easy to be stolen; in addition, the remote controller is generally integrated with a car key, and the car can be driven away only by stealing the key.

SUMMERY OF THE UTILITY MODEL

To the prior art shortcoming, the utility model aims to solve the problem of providing an automobile burglar alarm with automatic opening and closing antitheft function and combining automatic control technique, safe and reliable.

According to the above problem the utility model discloses take following scheme:

the automobile anti-theft alarm comprises a starting module, a radio frequency or fingerprint identification module and a power supply module thereof, and also comprises an anti-theft alarm module which is electrically connected with the radio frequency or fingerprint identification module and the power supply module thereof as well as the starting module.

The radio frequency or fingerprint identification module is used for providing a warning-solving triggering signal for the alarm module when the vehicle is normally started.

The power supply module is used for controlling the on-off of the working power supply of the radio frequency or fingerprint identification module, so that the radio frequency or fingerprint identification module is powered on only at the moment of starting a vehicle, and the power supply is automatically cut off after the vehicle is started, thereby prolonging the service life of the module and enhancing the working stability of the module.

The starting module is used for providing an alarm signal when the vehicle is abnormally started and an alarm-solving maintaining signal when the vehicle is normally started for the alarm module.

The anti-theft alarm module comprises a high-loudness buzzer, one end of the high-loudness buzzer is grounded, and the other end of the high-loudness buzzer is connected with the buzzer control circuit.

The buzzer control circuit is composed of a relay circuit, a long closed contact of the relay circuit is connected with the buzzer, an intermediate contact of the relay circuit is connected with the starting module, and a long open contact of the relay circuit is connected with the radio frequency or fingerprint identification module. One end of two control ends of the relay is connected with a 12V power supply, and the other end is connected with the triode circuit.

The collector of the triode in the triode circuit is connected with the control end of the relay, the emitter is grounded, and the base is connected to the radio frequency or fingerprint identification module sequentially through the current-limiting resistor and the filter inductor; a charging capacitor, a filter capacitor and a resistor are connected in parallel between the base electrode and the emitter electrode of the triode.

When correct fingerprint or radio frequency key signals are triggered, the trigger signals control the middle contact of the relay to be disconnected with the long closed contact through the triode circuit, the middle contact is connected to the long open contact, and the alarm is automatically released.

Meanwhile, a fingerprint or radio frequency key signal also controls the starting module to start the vehicle, the charging voltage after the engine is started is led back to the triode circuit through the long-open contact, the conduction of the triode is maintained, the relay is kept in the state, and the buzzer does not give an alarm. When a user stops and turns off the engine, the charging voltage of the engine is zero, the triode cannot be kept conducted, the relay loses power, the contact is reset, and the anti-theft state is automatically entered.

When a vehicle is tried to start by disconnecting a starting circuit without a key or without fingerprint identification, the charging voltage obtained after the engine is started directly drives the buzzer to sound for alarming.

The engine protection circuit is connected with the charging voltage input end of the engine, once the vehicle is started, the charging voltage of the engine is increased to 14V, so that the voltage stabilizing diode is conducted reversely, the relay is controlled by the control circuit to disconnect the engine circuit, and the repeated ignition starting of the engine is avoided.

The utility model is used for the automobile staring circuit, the automatic warning of removing when the vehicle legally starts can self-closing door window after stopping, gets into the theftproof state, need not the user operation, and convenience, safety, reliability are high. The utility model discloses still combine automatic control technique to set up engine protection circuit in the start module, set up control circuit at the power supply unit of radio frequency or fingerprint identification module, effectively protected radio frequency or fingerprint identification module and engine, prolong its life.

Drawings

FIG. 1 is a schematic diagram of the components of the anti-theft alarm module of the present invention and the specific circuit thereof;

fig. 2 is a schematic circuit diagram of the power module of the present invention;

fig. 3 is a schematic circuit diagram of the starting module of the present invention.

Detailed Description

To facilitate understanding of those skilled in the art, the present invention will be described in further detail below with reference to the accompanying drawings:

as shown in fig. 1, the alarm module comprises a high-loudness buzzer BZ1 and a control circuit thereof. One end of the BZ1 is grounded, the other end of the BZ1 is connected with a long closed contact of a relay K1, and an intermediate contact of the relay is connected with the starting module through a diode D11; one end of the relay is connected with a 12V power supply, and the other end of the relay is connected with a collector of a triode Q6; the emitter of the Q6 is grounded, and the base is connected with the fingerprint circuit or the radio frequency identification circuit through a resistor R12, an inductor L2 and a resistor R10; a filter capacitor C10, a charging delay capacitor C11 and a resistor R11 which are connected in parallel are connected between the emitter of the Q6 and the intersection point of the R12 and the L2.

When the correct fingerprint or radio frequency signal is triggered, one path of the trigger signal passes through a diode D10 to a starting module to start the vehicle; the other path charges a capacitor C11 through a resistor R10 and an inductor L2, when the charging voltage reaches the conduction voltage of Q6, the resistor R12 provides conduction current for Q6, Q6 is conducted, two control ends of the relay are electrified, and the contact is switched to be opened for a long time. The long-open contact of the relay is connected to a resistor R10, the charging voltage after the engine of the starting module is started is led back to the triode circuit through D11, the conduction of the triode is maintained, and no alarm is given.

When the vehicle is abnormally started without being triggered by a fingerprint circuit or a radio frequency identification circuit, the charging voltage obtained after the engine is started directly drives the buzzer to sound and alarm through the diode D11, the relay K1 intermediate contact and the long closed contact.

The other contact of the relay K1 shown in FIG. 1 is used for controlling the on-off of the power circuit of the fingerprint or radio frequency circuit.

As shown in fig. 2, the power module is used to control the power of the rf or the fingerprint recognition module. The power supply circuit comprises a triode Q3 circuit, wherein a collector of a Q3 circuit is connected with a 12V power supply, and an emitter of the Q3 circuit is connected with a power supply conversion chip U1.

When the door lock is opened, a high level signal or a low level signal passes through the resistor R5, the connector A, the triode Q4, the diode D6 or the resistor R5, the connector A, the triode Q5 and the diode D7, and finally the current-limiting resistor R6 enables the Q3 to be conducted, so that a 12V power supply is applied to the input end of the power conversion chip U1, and the U1 outputs a proper voltage to supply power for the radio frequency or fingerprint identification module.

After the vehicle is started by the radio frequency key or the fingerprint, one path of contact of the relay K1 acts to cut off the alarm loop, and the other path of contact acts to cut off the supply of the 12V power supply of the radio frequency or fingerprint identification module. At this time, the Q4 or the Q5 is powered off, the Q3 cannot be kept on, and after a period of time, the Q3 is turned off, and the radio frequency key or the fingerprint identification module is powered off, so that the service life of the radio frequency key or the fingerprint identification module is prolonged.

As shown in FIG. 3, the start control module includes two portions, a start circuit and an engine protection circuit.

The starting circuit comprises relays J1 and J3, a door and window opening and closing relay circuit controlled by J1 and J3, an oil circuit relay circuit and an engine relay circuit. Fingerprint or radio frequency trigger signals are transmitted to a triode Q1 driving circuit through a diode D1, a resistor R1 and a filter inductor L1, a delay capacitor C1 is charged, when the charging voltage reaches the conduction voltage of Q1, the Q1 is enabled to be conducted through a current-limiting resistor R3, and then the relays J1 and J3 act to control the door and window relay, the oil circuit relay and the engine relay to act, and a vehicle is started. At this time, the

contacts

5, 6, and 7 of the relay J1 are connected 5 and 7 after operation.

The engine protection circuit comprises a triode Q2 circuit and a relay J2 circuit controlled by Q2, after a vehicle is started, the charging voltage of an engine is introduced by a diode D2, sequentially passes through contacts 5 and 7 of the relay J1, and then is reversely conducted by a resistor R1, a filter inductor L1 and a resistor R2 through a voltage regulator ZD1, so that a starting current is provided for a base of Q2 to conduct Q2, and then the relay J2 acts to cut off the engine relay circuit. The repeated ignition of the engine is prevented, and the engine is protected.

Claims

1. The utility model provides an automobile burglar alarm, includes start module, radio frequency or fingerprint identification module and power module, its characterized in that: the anti-theft alarm module is electrically connected with the radio frequency or fingerprint identification module, the power supply module and the starting module; wherein,

the radio frequency or fingerprint identification module is used for providing an alarm-solving triggering signal for the anti-theft alarm module when the vehicle is normally started;

the power supply module is used for providing and controlling a working power supply of the radio frequency or fingerprint identification module;

the starting module is used for providing an alarm signal when the vehicle is abnormally started and an alarm-removing maintaining signal when the vehicle is normally started for the alarm module.

2. The car burglar alarm according to claim 1, wherein: the alarm module comprises a high-loudness buzzer BZ1, one end of the high-loudness buzzer BZ1 is grounded, and the other end of the high-loudness buzzer BZ1 is connected with a buzzer control circuit.

3. The car burglar alarm according to claim 2, wherein: the buzzer control circuit comprises a relay K1, a long closed contact of K1 is connected with a buzzer, an intermediate contact is connected with a starting module, a long open contact is connected with a triode circuit, and two control ends of K1 are respectively connected with a 12V power supply and the triode circuit.

4. The automobile burglar alarm according to claim 3, wherein: the triode circuit comprises a triode Q6, wherein a collector electrode of the triode Q6 is connected with a control end of a relay K1, an emitter is grounded, and a base electrode of the triode Q6 is connected to the radio frequency or fingerprint identification module through a current-limiting resistor R12, a filter inductor L2 and a resistor R10 in sequence; a charging delay capacitor C11, a filter capacitor C10 and a resistor R11 are connected in parallel between the intersection point of the L2 and the R12 and the emitter stage of the triode Q6.

5. The car burglar alarm according to claim 1, wherein: the power supply module comprises a power supply control circuit and a power supply conversion circuit which are sequentially connected.

6. The automobile burglar alarm according to claim 5, wherein: the power conversion circuit comprises a power conversion chip U1, the input end of U1 is connected with a filter capacitor C5, and the output end of the U1 is connected with filter capacitors C6 and C7.

7. The car burglar alarm according to claim 6, wherein: the power supply control circuit comprises a triode Q3 circuit, a collector of a Q3 is connected with a 12V power supply, and an emitter of the Q3 is connected with a power supply conversion chip U1; when the door lock is opened, a high level signal or a low level signal charges a delay capacitor C3 through a resistor R5, a connector A, a triode Q4, a diode D6 or a resistor R5, a connector A, a triode Q5 and a diode D7, and finally the resistor R6 conducts the Q3 to connect the power supply of the radio frequency or fingerprint identification module.

8. The car burglar alarm according to claim 1, wherein: the starting module is internally provided with an engine protection circuit which comprises a triode Q2 circuit and a relay J2 circuit controlled by Q2, after the vehicle is started, the engine charging voltage is introduced by a diode D2, and the Zener diode ZD1 is reversely conducted through contacts 5 and 7 of the relay J1, a resistor R1, a filter inductor L1 and a resistor R2 in sequence to provide conduction current for a base of Q2, and the Q2 is conducted to control the action of the relay J2 to cut off the starting circuit.