JP2573058Y2 - Anti-theft device - Google Patents

Description

[Detailed description of the invention]

[0001]

The present invention relates to an anti-theft device for vehicles such as automobiles, so-called car security, that is, arming or disarming is performed by remote control operation using a security code (ID code) without using a key. The present invention relates to a device for locking or unlocking a door of a vehicle such as an automobile.

[0002]

2. Description of the Related Art Conventionally, when a door of an automobile or the like is locked or unlocked, it is general to use a key. However, since this method can be unlocked relatively easily using another key or the like, the occurrence of theft accident has not always been small.

[0003] Therefore, a certain code (a password) is stored in a control device mounted on the vehicle, and a command relating to locking or unlocking of the door and the like is transmitted from outside the vehicle using a remote control device. An automatic arming device for unlocking or locking a door has been developed and put into practical use.

[0004] Such a conventional device is configured such that a door unlock signal is output at the same time as a disarming operation is performed by a remote control device to unlock the door.

[0005]

In the conventional apparatus as described above, there is no problem at all when the passenger gets on and off the vehicle according to a predetermined procedure, but it is very convenient. There was a problem in the case where the procedure of getting on and off was irregular. For example, when arming the vehicle, temporarily leaving the vehicle, and then returning, approaching the vehicle and transmitting a disarm signal from the remote controller, the door is unlocked at the same time as described above. At this time, there is no problem if you get on immediately, but for example, if you do not get on and talk with friends etc. and leave the vehicle again, the door remains unlocked. So this is very likely to be stolen. The present invention seeks to provide an automatic arming device for car security having an anti-theft device effective in such cases.

[0006]

According to the present invention, the object of the present invention is to provide a main body of the anti-theft device installed on the vehicle side with a receiving means and a remote control device for receiving a signal such as a radio wave from a separate remote control device. Means for transmitting a signal, a control unit for controlling arming including control of a door lock unit and a door unlock unit of the vehicle based on a reception signal received by the reception unit, and an approach detection unit for detecting approach of a person to the vehicle. The separate remote control device includes a transmitting unit that transmits a signal to the anti-theft device main body installed on the vehicle side, and a receiving unit that receives a signal from the anti-theft device main unit. When a disarm signal is transmitted from the anti-theft device to the main body of the anti-theft device, and the receiving means of the anti-theft device receives the signal, the control unit unlocks the vehicle door. Performs part disarmed of excluding, by detecting the presence or absence of a person approaching the said vehicle, for a time presence detection even ID code check signal originating from said transmitting means by said proximity detection means,
The control unit operates the door unlocking unit to unlock the vehicle only when the reception unit and the transmission unit of the remote control device transmit the ID code of the remote control device and confirms the ID code. Is done.

[0007]

Since the anti-theft device installed on the vehicle has both receiving and transmitting means and a separate remote control device has both receiving and transmitting means, two-way communication is possible. By disassembling the door other than the door at the time of disarming, the door is unlocked after performing a two-step check of approach detection and ID code confirmation. As a result, the effect of preventing theft is significantly improved.

[0008]

FIG. 1 is a block diagram showing an embodiment of the present invention.
Reference numeral 1 denotes a main body of the anti-theft device mounted on a vehicle, and reference numeral 20 denotes a separate remote controller. The anti-theft apparatus main body 1 according to the present embodiment includes, as receiving means, a high-frequency amplifier circuit 11, a mixer 12, a local oscillation circuit 13 for receiving a signal input from the antenna 1a, and demodulates a received signal. A detector 14, a waveform shaping circuit 15 for shaping the demodulated signal waveform, and a microcomputer-based control unit 16 for controlling a door lock unit and a door unlocking unit, which will be described later, based on an input from the waveform shaping circuit 15, etc. It is composed of a memory 17 connected to the control unit 16, and as a transmitting means,
The modulation circuit 18 and the oscillation circuit 19 connected to the control unit 16
And transmitted from the antenna 1b.

Further, reference numeral 2 denotes a door sensor unit for detecting the open / closed state of a vehicle door, and 3 denotes a radar sensor unit as approach detection means for detecting the presence of a person around the vehicle. Anti-theft device body 1
, Respectively.

Reference numeral 4 denotes a door lock unit for locking the door of the vehicle, 5 an unlock unit for unlocking the door, and 6 a siren unit for issuing an alarm when a theft occurs. It operates under the control of No. 16.

The remote control device 20 according to the present embodiment includes, as transmission means, an operation unit 21 having various keys and the like, a control unit 22 having a microcomputer configuration, a memory 23 connected therewith, a modulation circuit 24, and an oscillation circuit 25. , Oscillation circuit 25
Is connected to the antenna 20a. On the other hand, as a receiving means, a signal received from the antenna 20b passes through a high-frequency amplifier circuit 26, the signal is frequency-converted by a mixer 27a and a local oscillator circuit 27b, demodulated by a detector 28, and then shaped by a waveform shaping circuit 29. Is input to the control unit 22.

Next, the operation of this embodiment will be described with reference to the flowchart of FIG. First, the vehicle is stopped, the engine is turned off, the arm is in an arming state (step 101), and a user (hereinafter simply referred to as a person) of the vehicle tries to return to the vehicle from a state away from the vehicle. By operating the operation unit 21 of the remote control device 20 carried by the user, the control unit 22 reads the ID code and the disarming command from the memory 23, activates the modulation circuit 24 and the oscillation circuit 25, and transmits a signal from the antenna 20a.

This signal is received by the antenna 1a of the anti-theft device 1 installed in the vehicle, and the receiving means, that is, the high-frequency amplifier 11, the mixer 12, the local oscillator 1
3. Waveform shaping circuit 15 which is received and demodulated by detector 14
Is input to the control unit 16. Control unit 1
No. 6 continuously checks whether or not a disarm signal has been received (step 102). If there is this input, it is determined that the disarm signal has been received (step 103).
The arming portion (not shown) other than the door unlocking portion 6 is disarmed (step 104).

Next, the radar sensor unit 3 is operated for a predetermined time to detect a person approaching the vehicle. Then, the control unit 16 operates a timer to check whether or not a detection signal is input from the radar sensor unit 3 for a predetermined time (step 1).
05) If there is a signal input, a radar sensor signal is received (step 106). Here, if there is no signal input within the set time, it is determined that the approach to the vehicle has been delayed or stopped for some reason, or that the disarm signal has been transmitted erroneously in step 101. And arm the vehicle.

If a radar sensor signal is received in step 106, the control section 16 transmits an ID check signal to the remote control device 20 carried by the approaching person (step 107). This is the control unit 16
Is performed by reading a predetermined command from the memory 17, activating the modulation circuit 18 and the oscillation circuit 19, and transmitting the command from the antenna 1b.

The received ID check signal is received and demodulated by the antenna 20b, the high frequency amplifier circuit 26, the mixer 27a, the local oscillator circuit 27b, and the detector 28, and the receiving means of the remote controller 20 outputs the output to the waveform shaping circuit 29. The control unit 22 reads out its own ID code stored in the memory 23, activates the modulation circuit 24 and the oscillation circuit 25, and transmits a signal from the antenna 20a.

This signal is received by the antenna 1a of the anti-theft device main body 1 installed in the vehicle, and is input to the control section 16 which checks the presence or absence of the input of the ID transmission signal via the above-mentioned receiving means (step 108). Therefore, if an input is detected, an ID transmission signal is received (step 109),
A collation check with the ID code stored in the memory 17 connected to the control unit 16 is performed (step 110). ID
If it is confirmed that the codes are the same, a door unlock signal is output here (step 111), and the door unlock section 5 is operated to unlock the door of the vehicle.

In step 108, the control unit 16
If the ID transmission signal is not input even after waiting for a predetermined time,
In step 110, if the result of the ID code confirmation / collation does not match, in any case, the process returns to step 101 to arm the vehicle.

FIG. 3 shows a reach area A of the radar sensor detection signal and a reach area B of the ID check signal from the vehicle C equipped with the anti-theft device including the radar sensor unit 2 in the embodiment of the present invention. As described above, if there is no signal input in step 105, that is, if the radar sensor unit 2 does not detect the presence of a person in the area A, arming is performed.
At 08, if no signal is input, that is, if the presence of a person in the area B is not detected by the input of the ID transmission signal, arming is performed.

In the above embodiment, the radar sensor is used as means for detecting the approach of a person, but the signal is intermittently transmitted (for example, at intervals of several seconds) by limiting the reach of the ID check signal. By doing so, it can be used as approach detection means.

[0021]

As described above, according to the present invention, as an automatic arming device for car security, the door is unlocked at the same time by the disarm operation, so that there is a problem in a case where the passenger does not immediately get on. Using a remote control device with a two-way communication function,
Since the relationship between the disarm and the door unlock is configured in two stages, the effect of preventing theft is remarkably improved.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is a flowchart of the operation of the embodiment of the present invention;

FIG. 3 is an explanatory diagram of a signal reaching area according to an embodiment of the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Theft prevention device main body 1a Antenna 1b Antenna 11 High frequency amplifier circuit 12 Mixer 13 Local oscillation circuit 14 Detector 15 Waveform shaping circuit 16 Control unit 17 Memory 18 Modulation circuit 19 Oscillation circuit 2 Door sensor unit 3 Radar sensor unit 4 Door lock unit 5 Door unlocking unit 6 Siren unit 20 Remote control device 20a Antenna 20b Antenna 21 Operation unit 22 Control unit 23 Memory 24 Modulation circuit 25 Oscillation circuit 26 High frequency amplification circuit 27a Mixer 27b Local oscillation circuit 28 Detector 29 Waveform shaping circuit

Claims (1)

(57) [Scope of request for utility model registration] 1. A remote control device having a first transmitting unit and a first receiving unit, a second transmitting unit, a second receiving unit, and an approach detecting unit detecting an approach of a person to a vehicle. An anti-theft device capable of transmission and reception comprising an anti-theft main unit, wherein the anti-theft main unit controls door unlocking of a vehicle when a second receiving unit receives a disarm signal from a first transmitting unit. Means for performing disarm control excluding the above, and after the disarm control, an ID code request signal for requesting transmission of an ID code of the remote control device when presence or absence of a person approaching the vehicle is detected by the approach detection means. Transmitting the ID code request signal from the second transmitting means to the first receiving means; and receiving the ID code request signal from the second transmitting means at the first receiving means, and transmitting the ID code request signal from the second transmitting means to the first receiving means. When the second receiving means receives the ID code of the device, the received ID code and the I
A control unit comprising: a unit for comparing with a D code; and a unit for performing unlock control of a door of a vehicle when the ID codes match each other as a result of the comparison of the ID codes. Anti-theft device.