CN1519147A - Vehicle burglar alarm system - Google Patents

Abstract

A vehicle immobilizer system includes an immobilizer body mounted on a vehicle, and a remote controller carried by an authorized operator. The burglar alarm main body comprises an antitheft detection circuit, a control device, a receiver connected with the control device and a transmitter. The receiver is used for receiving a signal with a first frequency. The transmitter can continuously transmit signals with a second frequency. The remote controller comprises a receiving circuit and a transmitting circuit. When the receiving circuit of the remote controller receives a signal with a second frequency transmitted by the transmitter of the burglar alarm main body, the transmitting circuit can send out a signal with a first frequency, and when the receiver of the burglar alarm main body receives the signal with the first frequency, the preset function of the control device can be automatically started.

Description

vehicle immobilizer system

technical field

The invention relates to a vehicle anti-theft device system, in particular to a vehicle anti-theft device system which automatically releases the anti-theft state.

Background technique

Vehicle anti-theft systems have been widely used to prevent vehicle theft, prevent theft of valuables in vehicles, prevent vehicles from being destroyed and protect the safety of drivers and passengers in vehicles. A typical vehicle anti-theft system mainly includes a central processing unit or a controller connected to a plurality of sensors, which can be used to detect whether the vehicle's doors, windows, trunk and/or hood are opened, Vehicles and movement within them. Such sensors may include ultrasonic and microwave motion detectors, vibration detectors, differential pressure detectors and voice identifiers. In addition, radar can also be used to monitor the location of the vehicle. When these sensors are triggered, the central processing unit or controller immediately sends out an alarm signal, such as flashing lights, honking the horn or siren. In addition, if the vehicle is in an anti-theft state, the oil supply pipeline or ignition circuit of the vehicle can be cut off to prevent the vehicle from being started illegally.

A typical vehicle anti-theft system usually includes a receiver connected to a central processing unit or controller, and one or several remote control transmitters cooperate with the receiver. For example, it is disclosed in US Pat. No. 4,383,242. The remote control transmitter can be used to set and release the anti-theft state of the central processing unit or the controller, or remotely control the function of the central processing unit or the controller within a predetermined distance outside the vehicle.

However, the above-mentioned remote control transmitter must be actively controlled by the user to passively set and remove the anti-theft state of the central processing unit or controller, so it is inconvenient for the user to actively control the remote control (for example, both hands are holding heavy objects and cannot free one hand to control the remote control), there is a problem that the anti-theft state of the vehicle cannot be removed.

Contents of the invention

The main purpose of the present invention is to provide an intelligent vehicle anti-theft device system, which is characterized in that the system can detect the approach of an authorized operator (authorized operator) and actively release the anti-theft state.

Another object of the present invention is to provide an intelligent vehicle anti-theft device system, which can automatically open the vehicle door after the system detects the approach of an authorized operator.

To achieve the above and others, the vehicle anti-theft system according to the embodiment of the present invention mainly includes an anti-theft device body installed on a vehicle, and a remote controller that can be carried by an authorized operator. The main body of the anti-theft device contains:

a control device;

A receiver is connected to the control device, the receiver is used to receive a signal with a first frequency; and

a transmitter is capable of continuously emitting a signal having a second frequency that is different from the first frequency; and

A remote controller includes a receiving circuit and a transmitting circuit, wherein when the receiving circuit of the remote controller receives a signal with a second frequency from the transmitter of the anti-theft device main body, the transmitting circuit sends out a signal with a first frequency , when the receiver of the main body of the anti-theft device receives a signal with the first frequency, it will cause the control device to execute a preset function.

The main body of the anti-theft device further includes an anti-theft detection circuit, and the preset function of the control device includes closing the anti-theft detection circuit.

The pre-programmed functions of the control unit include automatic door opening.

The signal sent by the transmitter of the main body of the anti-theft device covers a radius of about 2-3 meters with the vehicle as the center of the circle.

The transmitter of the anti-theft device main body only sends out a signal when the anti-theft detection circuit is opened.

The first frequency is in a frequency band of about 433.92 MHz.

The second frequency is in a frequency band of about 13.56 MHz.

The main body of the anti-theft device includes an anti-theft detection circuit, a control device, a receiver connected with the control device and a transmitter. The receiver is capable of receiving signals with a first frequency. The transmitter can continuously send out a signal with a second frequency, and the signal sent by it covers a radius of about 2-3 meters with the vehicle as the center. Preferably, the transmitter sends out a signal only when the anti-theft detection circuit is turned on.

The remote controller includes a microprocessor, and the microprocessor includes a receiving circuit and a transmitting circuit. When the receiving circuit receives a signal with the second frequency from the transmitter of the anti-theft device body, the transmitting circuit will send a signal with the first frequency to the receiver, thereby enabling the control device to execute the preset function, such as closing the anti-theft detection circuit and opening the door.

In an embodiment of the present invention, the first frequency is selected at a frequency band of about 433.92 MHz, and the second frequency is selected at a lower frequency band of about 13.56 MHz, so as to continuously transmit the signal with the second frequency.

In order to make the above and other objects, features, and advantages of the present invention more apparent, preferred embodiments of the present invention will be described in detail below with accompanying drawings.

Description of drawings

Fig. 1a is a block diagram of the main structure of the anti-theft device of the vehicle anti-theft system according to an embodiment of the present invention;

Fig. 1b is a structural block diagram of a remote controller of a vehicle anti-theft system according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of signal transmission using the anti-theft system according to an embodiment of the present invention.

Implementation

Figure 1a and Figure 1b show a vehicle anti-theft system according to an embodiment of the present invention, the system mainly includes an anti-theft device main body 100 (as shown in Figure 1a) installed on a vehicle, and a remote controller 200 (as shown in Figure 1a) 1b) can be carried by an authorized operator. The anti-theft device body 100 includes an anti-theft detection circuit 108 , a control device 102 , a receiver 104 and a transmitter 106 . The remote control 200 includes a microprocessor 202, and the microprocessor includes a receiving circuit (not shown in the figure) and a transmitting circuit (not shown in the figure).

The control device 102 may have a central processing unit or a microprocessor, and is controlled and executed by a program preset and stored in the central processing unit or microprocessor 110 . Generally speaking, the control device 102 has an input interface 112 and an output interface 114 connected to the microprocessor 110 . The input interface 112 is connected to the anti-theft detection circuit 108, and the anti-theft detection circuit 108 includes several sensors, such as: start switch (ignition switch) sensor 116, car door sensor 118, trunk sensor 120, engine cover The sensor 122 and the vibration sensor 124 . Those skilled in the art should understand that the sensor of the present invention is not limited to the aforementioned sensors, and other vehicle anti-theft sensors can also be connected to the input interface 112 to achieve the function of anti-theft sensing. The output interface 114 is connected to various anti-theft devices of the vehicle, including: an alarm 126 , a central lock 128 , a direction light 130 , a parking light 132 , a start-off device 134 and a pager 136 . Those skilled in the art should understand that the anti-theft device of the present invention is not limited to the above-mentioned anti-theft device, and other anti-theft devices for vehicle anti-theft can also be connected to the output interface 116 of the present invention to achieve the anti-theft function of the present invention.

Referring to FIG. 1 a , the receiver 104 is provided on the control device 102 and connected to the microprocessor 110 . The receiver 104 is used for receiving a signal with a first frequency f1 (as shown in FIG. 2 ).

Referring to FIG. 1 a, the transmitter 106 continuously sends out a signal having a second frequency f2 (as shown in FIG. 2 ), wherein the second frequency is different from the first frequency. According to an embodiment of the present invention, the first frequency is in a frequency band of about 433.92 MHz, and the second frequency is in a frequency band of about 13.56 MHz. Referring to Fig. 2, the signal sent by the transmitter 106 can at least cover the range of about 2-3 meters with the vehicle as the center radius, that is to say, within the range of about 2-3 meters with the vehicle as the center radius, the The strength of the signal sent by the transmitter 106 is sufficient to be sensed by the receiving circuit of the remote controller 200 .

Referring to Fig. 1b and Fig. 2, when the receiving circuit receives the signal with the second frequency f2 transmitted by the transmitter 106 of the anti-theft device main body 100, the transmitting circuit sends a signal with the first frequency f1, when the anti-theft device When the receiver 104 of the main body receives the signal with the first frequency f1, it will send a signal to the microprocessor 110, so that the control device 102 automatically performs a preset function, such as closing the anti-theft detection circuit 108 and opening Car door (open central lock 128).

The feature of the vehicle anti-theft device system of the present invention is that the main body of the anti-theft device and the remote controller actively communicate with each other by using the exchange of signals of two different frequencies, so as to achieve the purpose of intelligent automatic control. This automatic control mechanism not only does not need the authorized operator who carries the remote control to take the initiative but can automatically release the anti-theft mechanism of the anti-theft device, and can have the function of automatically opening the door to help the authorized operator who is inconvenient to operate the remote control, such as a portable People who are full of goods can easily board the vehicle and then unload the goods in their hands, without having to put down part of the goods in advance to operate the remote control.

Although the present invention has been disclosed with the aforementioned preferred embodiments, it is not intended to limit the present invention. Any skilled person can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore The protection scope of the present invention should be defined by the claims.

Claims (7)

1, a kind of anti-theft device for vehicle system, it comprises:

One Car Burglar Alarm main body is installed on the vehicle, it is characterized in that this Car Burglar Alarm main body comprises:

One control setup;

One receptor is connected with this control setup, and this receptor has the signal of a first frequency in order to reception; And

One projector can continue to send the signal with a second frequency, and this second frequency is to be different from this first frequency; And

One remote controller comprises an acceptor circuit and a transmission circuit,

Wherein when the acceptor circuit of this remote controller receives that the projector of this Car Burglar Alarm main body spreads out of the signal with second frequency, this transmission circuit is sent the signal with first frequency, when the receptor of this Car Burglar Alarm main body is received the signal with first frequency, can make this control setup carry out predefined function.

2, anti-theft device for vehicle according to claim 1 system is characterized in that this Car Burglar Alarm main body comprises a burglar detection loop in addition, and the predefined function of this control setup comprises closes this burglar detection loop.

3, anti-theft device for vehicle according to claim 1 system is characterized in that the predefined function of this control setup comprises the self-opening car door.

4, anti-theft device for vehicle according to claim 1 system is characterized in that it is the scope of the about 2-3 meter of center of circle radius that signal that the projector of this Car Burglar Alarm main body sends is contained with this vehicle.

5, anti-theft device for vehicle according to claim 1 system, the projector that it is characterized in that this Car Burglar Alarm main body sends signal when only opening in this burglar detection loop.

6, anti-theft device for vehicle according to claim 1 system is characterized in that the frequency band of this first frequency at about 433.92MHz.

7, anti-theft device for vehicle according to claim 1 system is characterized in that the frequency band of this second frequency at about 13.56MHz.

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