JP2003120097A - Vehicle theft preventive system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To release the lock of a vehicle without using an exclusive medium such as IC card. SOLUTION: When a driver leaves the vehicle after locking a door, a feeble radio wave is regularly transmitted from an on-vehicle machine 1, and a portable terminal 21 is programmed so as to receive this feeble radio wave, when pressing a call button, and transmit a call signal. Accordingly, when a regular driver gets close to the vehicle and presses the call button, the on-vehicle machine 1 receives the call signal, detects the ID number of the portable terminal 21 included therein, judges whether it is right or not, and transmits a matching signal a to an electronic control device 10 when it is right, and the electronic control device 10 transmits a lock release signal b to an electronic lock 11 to release the door lock. Thus, only the regular driver can release the door lock, and the theft of the vehicle can be prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle antitheft system for preventing vehicle theft.

[0002]

2. Description of the Related Art Theft of a vehicle may occur when the driver leaves the vehicle with the engine running, or when the engine is stopped and the driver leaves the vehicle without removing the ignition key. Further, even if the door key is locked, the door lock may be unlocked with the duplicate key, or the vehicle may be stolen by unlocking the ignition key with the duplicate key. For this reason, a vehicle theft prevention device by electronic control has been developed, and a device for releasing a door key lock by an IC card has been put into practical use. This IC card
A non-contact card in which an IC and an antenna are embedded in the card, receives a radio wave transmitted from an antenna of a reader / writer provided in a vehicle, and activates electric power from the radio wave.
When the D signal is emitted, the reader / writer on the vehicle side receives and confirms it, and sends a signal to the electronic control unit (ECU) of the vehicle, and the electronic control unit sends a release signal to the electronic door key to unlock. It is supposed to do.

[0003]

However, in the conventional vehicle theft prevention device using the IC card, if the user forgets to bring the IC card, the door key of the vehicle cannot be unlocked. There was a problem that I had to get my IC card back.

The present invention solves such a conventional problem, and provides a vehicle antitheft system capable of unlocking a vehicle without using a dedicated medium such as an IC card. With the goal.

[0005]

In order to achieve the above object, a vehicle antitheft system of the present invention includes a portable terminal having a function of transmitting and receiving radio waves, and a vehicle provided to control lock of a door key of the vehicle. And an in-vehicle device that transmits a radio wave to the mobile terminal and sends an unlock signal to the electronic control device when a signal including an ID number is received from the mobile terminal. . With this configuration, when an authorized user of the vehicle approaches the vehicle with the mobile terminal, the mobile terminal receives the radio wave from the vehicle-mounted device and transmits, for example, a call signal including the ID number. The ID number is detected from the calling signal,
When the ID number is a correct ID number, a signal is sent to the electronic control unit to unlock the door, so that a dedicated medium such as an IC card is not used.
The lock can be released using the mobile terminal carried by the driver, and convenience can be improved.

Further, the vehicle theft prevention system of the present invention is
The electronic control unit can control the lock of the ignition key of the vehicle, and unlocks the ignition key by a lock release signal from the vehicle-mounted device, wherein the door key is locked for some reason. Even if it is not, since the ignition key is locked, it is possible to prevent the vehicle from being stolen by an unauthorized person.

The vehicle antitheft system of the present invention is
The vehicle-mounted device receives a signal including the ID number from the mobile terminal, a unit for detecting an ID number in the received signal, the detected ID number and an ID number stored in a memory. And a means for sending out a coincidence signal to the electronic control unit when they match each other, and a vehicle theft prevention system can be realized with a simple device configuration.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the configuration of a vehicle antitheft system according to an embodiment of the present invention. In FIG. 1, an in-vehicle device 1 mounted on a vehicle includes a weak radio wave generation unit 2, a transmission unit 3, a reception unit 4, and a control unit 5. The weak radio wave generation unit 2 generates a radio wave having a transmission distance of about 5 m and transmits it from the transmission unit 3 through the antenna. The receiving unit 4 receives a radio wave from the mobile terminal 21.
The control unit 5 includes a calling signal detection unit 6 that detects a calling signal from the radio waves received by the receiving unit 4, an ID number detection unit 7 that detects an ID number in the received calling signal, and An ID number collating unit 8 is provided which collates the detected ID number with the ID number stored in the ID number storage unit 9 and sends a coincidence signal to the electronic control unit 10 when they coincide with each other. The calling signal detector 6 stores the frequency (calling control channel) of the calling signal acquired from the mobile terminal 21, and controls the receiver 4 to receive this frequency. The ID number storage unit 9 acquires the unique ID number assigned to the mobile terminal 21 from the mobile terminal 21 and stores it. Electronic control unit (E
The CU) 10 controls the entire electronic system including the engine of the vehicle in which the vehicle-mounted device 1 is mounted, and can control the opening and closing of the electronic lock 11 such as a door key or an ignition key.
The electronic lock 11 is manually operated when locked and electrically driven by a solenoid or a motor when unlocked. The mobile terminal 21 includes a transmission / reception unit 22 and a control unit 23 for communicating with the base station 31, and further includes a card adapter 24, and by inserting a memory card 25 recording an anti-theft program, You can add stolen programs to your programs.
The anti-theft program is a procedure to synchronize a weak radio wave of a specified frequency when the call button is pressed without entering a telephone number and to send a call signal when the weak radio wave is received. Is recorded. Mobile terminal 21
When making a call request to the base station 31, the mobile station originates using a transmission control channel of a predetermined frequency, and the base station that receives the mobile station belongs to the control zone of the base station 31. If it belongs, a response signal designating a communication channel is transmitted. Upon receiving this response signal, the mobile terminal dials the other party's number and pushes the call button to send a call signal, and when the line is connected, a call becomes possible.

Next, the operation of this embodiment will be described with reference to the flow chart of FIG. When putting the vehicle in a parking lot or a garage, the driver turns on the power supply of the vehicle-mounted device 1 to transmit the weak radio waves from the weak radio wave generation unit 2 and the transmission unit 3, and the control unit 5 is carried by the reception unit 4. The terminal 21 is controlled so as to be tuned to the frequency of the calling signal, and enters the standby state (step S1). When the driver locks the ignition key and the door key, the lock signal is sent from the electronic lock 11 to the electronic control unit 10 (step S2). In this standby state, when the driver approaches the vehicle with the portable terminal 21 having the anti-theft program installed as described above, the transceiver 22 receives a weak radio wave from the vehicle-mounted device 1, and the driver When the calling button is pressed, a calling signal including the ID number is transmitted from the antenna (step S3). When the receiving unit 4 receives the radio wave carrying the calling signal in the vehicle-mounted device (step S4), the calling signal detecting unit 6 detects the calling signal (step S5), and the ID number detecting unit 7 detects the calling signal. The ID number of the mobile terminal 21 is extracted (step S6), and its ID
I and the ID number read from the ID number storage unit 9
The D number collating unit 8 collates (step S7), and only when they coincide (step S8), the coincidence signal a is sent to the electronic control unit 10 (step S9). Electronic control unit 10
When receiving the coincidence signal a, the unlocking signal b is sent to the electronic lock 11 of the door to unlock the door, and the unlocking signal b is also sent to the electronic lock 11 of the ignition key to insert the ignition key. Yes (step S1
0). As a result, only an authorized driver can unlock the door, insert the ignition key and start the engine.

As described above, according to the present embodiment, when the driver locks the door and leaves the vehicle, a weak radio wave is always transmitted from the vehicle-mounted device 1, while the driver carries it. Since the mobile terminal 21 is programmed to receive the weak radio wave and transmit a call signal when the call button is pressed, an authorized driver carrying the mobile terminal 21 approaches the vehicle. And press the call button, the in-vehicle device 1
Receives the call signal, and the mobile terminal 2 included therein
The ID number of 1 is detected, it is checked whether it is correct, and if it is correct, the coincidence signal a is sent to the electronic control unit 10, and the electronic control unit 10 sends the lock release signal b to the electronic lock 11. Since the door lock is released by only the authorized driver, only the authorized driver can release the door lock, and the vehicle can be prevented from being stolen.

In the above-described embodiment, the calling signal detector 6 stores the frequency of the calling signal sent from the mobile terminal 21 (originating control channel). It can be acquired by the mobile terminal 21 by receiving the incoming control channel that is constantly transmitted from the base station 31, so if the mobile terminal 21 moves to another control zone and enters another control zone, it is transmitted from the base station in that control zone. It is necessary to receive the incoming control channel that is specified and obtain the outgoing control channel specified there. For this reason, when moving to another area and changing to another transmission control channel, it is necessary to rewrite the frequency stored in the calling signal detection unit 6, and this is searched for the radio wave transmitted from the mobile terminal 21. Alternatively, the frequency with the highest received electric field may be selected and rewritten as the transmission control channel.

In the above embodiment, I
Although the calling signal is used as the signal including the D number, since the ID number is also included in the position registration signal, this may be used. Further, the case where the PDC mobile phone is used as the mobile terminal has been described, but the same can be performed when the PHS is used.

In addition, the function of the vehicle-mounted device 1 in the above-described embodiment is set to Bluetooth (short-range wireless data communication technology).
The present invention can be implemented by implementing the above and installing the Bluetooth in the mobile terminal 21 and installing the anti-theft program.

[0014]

As described above, the vehicle antitheft system of the present invention is a portable terminal having a function of transmitting and receiving radio waves, and an electronic control device provided in the vehicle and capable of unlocking the door key of the vehicle. And a vehicle-mounted device that transmits a radio wave to the mobile terminal and sends an unlock signal to the electronic control unit when a signal including an ID number is received from the mobile terminal. When the user approaches the vehicle with the mobile terminal, the mobile terminal receives the radio wave from the vehicle-mounted device and transmits a signal including the ID number, so the vehicle-mounted device detects the ID number from the signal, When the ID number is the correct ID number, the electronic control unit unlocks the door lock.
The lock can be released using the portable terminal carried by the driver without using a dedicated medium such as a card, and convenience can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a vehicle theft prevention system according to an embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of the vehicle theft prevention system according to the embodiment of the present invention.

[Explanation of symbols] 1 In-vehicle device 2 Weak radio wave generator 3 transmitter 4 Receiver 5 control unit 6 Calling signal detector 7 ID number detector 8 ID number collation unit 9 ID number storage 10 Electronic control unit (ECU) 11 electronic lock 21 Mobile terminal 22 Transmitter / receiver 23 Control unit 24 card adapter 25 memory card 31 base stations

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Claims (4)

[Claims] 1. A mobile terminal having a function of transmitting and receiving radio waves,
An electronic control device that is provided in a vehicle and that controls a lock of a door key of the vehicle, and that locks the electronic control device when transmitting a radio wave to the mobile terminal and receiving a signal including an ID number from the mobile terminal A vehicle theft prevention system including an in-vehicle device that sends a release signal. 2. The electronic control unit is capable of controlling lock of an ignition key of the vehicle, and unlocks the ignition key by a lock release signal from the vehicle-mounted device. Vehicle anti-theft system. 3. The in-vehicle device receives a signal including the ID number from the portable terminal, a unit for detecting an ID number in the received signal, and the detected ID.
The vehicle theft prevention system according to claim 1 or 2, further comprising: a unit that collates the number with the ID number stored in the memory and sends a coincidence signal to the electronic control unit when they coincide with each other. 4. An in-vehicle device used in the vehicle antitheft system according to any one of claims 1 to 3.