JP2002362318A - Vehicle theft detecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle theft detecting device capable of detecting a theft of a vehicle, and tracking a stolen vehicle. SOLUTION: This device is provided with a theft detecting state setting means 22 to set for a theft detecting action state for the vehicle as a subject to monitoring, a tire air pressure abnormality detecting means 24 to send an air pressure abnormality detecting signal when air pressure detected by a vehicle tire air pressure sensor 31 is changed to be reduced for a prescribed value or more, a vehicle position move detecting means 26 to monitor a vehicle position by a GPS 30, and send a vehicle position move signal when it is moved for more than a predetermined distance, a vehicle theft determining means 23 to determine the vehicle as stolen when the tire air pressure abnormality detecting means 24 sends the air pressure abnormality signal, and when the vehicle position move detecting means 26 sends the position move signal, as the theft detecting state setting means 22 is in the action state, and an automotive telephone device 27 to notify generation of the theft to a prescribed place.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a vehicle theft detection device for detecting theft of a vehicle such as an automobile and tracking the stolen vehicle.

[0002]

2. Description of the Related Art Conventional vehicle antitheft devices include a vehicle theft determining device and a vehicle antitheft device disclosed in Japanese Patent Application Laid-Open No. 9-240432. This conventional example is an anti-theft device capable of coping with systematic theft carried by a tow truck or a trailer, in addition to a case where the engine is started and moved by an illegal key operation to move and steal. A specific example of this conventional example will be described with reference to FIG.

As shown in FIG. 4, a key 1 in which a transponder 2 is incorporated and a key 1 of a vehicle (not shown) are transmitted from the transponder 2 when a start operation of inserting and rotating the key is performed. An antenna 3 incorporated in a key cylinder for receiving a key ID number signal, an amplifier 4 for amplifying and outputting a key ID number signal received by the antenna 3, and a key ID number registered in advance And a key ID number registered in the immobilizer unit 5, and an engine control unit 6 for starting the engine when the collation matches.

[0004] Further, a GPS 8 for providing planar position information on the ground surface of the vehicle (own vehicle) and a vehicle-mounted communication device 7 which receives the position information of the GPS 8 and the key ID number collation result of the immobilizer unit 5 as inputs. Have. This in-vehicle communication device 7 includes a control circuit 7a, a locator circuit 7b, and a modem circuit 7c.
Plane position information PA from GPS 8 when vehicle is off
Is stored in the locator circuit 7b.
b.

The locator circuit 7b compares the current vehicle position information PA at the time of key-off with the current vehicle position information PB every time the current vehicle position information PB is inputted, and determines whether the plane position is longer than a predetermined distance LH. It monitors whether a typical distance movement has occurred. When the control circuit 7a receives a notification that a plane movement exceeding a predetermined distance has occurred from the locator circuit 7b, the control circuit 7a obtains a key ID number verification result from the immobilizer unit 5 at that time and determines whether or not verification has been established. Is satisfied, it means that the vehicle is traveling by normal driving, and it is not determined that the vehicle has been stolen. This detection operation is repeated.

If the locator circuit 7b is notified that a plane movement exceeding a predetermined distance has occurred, and if the immobilizer unit 5 has not verified the key ID number, it is determined that the vehicle has been stolen and the in-vehicle communication device is determined. The mobile phone device 9 is operated by 7 to automatically send a call to a preset report destination to report the occurrence of theft. In addition, instead of reporting the occurrence of theft, the in-vehicle communication device 7 sends an alarm activation signal to the alarm unit 12 and continuously sounds the horn 10 or blinks the flasher lamp and the headlamp 11 to light the surrounding people. This is to notify the theft occurrence.

Instead of detecting the plane moving distance of the vehicle, an inclination sensor is attached to the vehicle, and the inclination of the vehicle generated when the vehicle is lifted during theft is detected by the inclination sensor. If the angle detection signal is detected by the in-vehicle communication device 7 and this tilt detection is generated from the immobilizer unit 5 in a state where the collation of the key ID number has not been established, a notification destination set in advance is set in the same manner as described above. The horn 10 or the like is used to automatically report the occurrence of theft, or to notify the surrounding people of the occurrence of theft using the horn 10 or the like.

[0008]

However, in order to start the vehicle engine, the conventional vehicle theft determination device and the vehicle antitheft device described above require at least the key 1 incorporating the transponder chip 2 and the immobilizer unit 5. However, there is a problem that the cost is high. In addition, the means for detecting the occurrence of theft only needs to detect one phenomenon, such as when the planar moving distance of the vehicle is equal to or more than the reference distance, or when the inclination angle of the vehicle is equal to or more than the reference angle. Therefore, it is necessary to increase the detection accuracy due to this one phenomenon. That is, the movement detection accuracy of the GPS 8 is about several meters (2 to 3 m) under favorable conditions, but varies depending on the conditions. Therefore, it is necessary to set the detection movement distance to a certain distance. In addition, the inclination angle may also be inclined due to the accuracy of the inclination sensor or the swing of the vehicle due to an external pressure other than theft, and it is very difficult to set a reference detection angle for detecting occurrence of theft without error. . The present invention is to solve such a problem of the conventional device and to provide a vehicle theft detection device capable of detecting theft of a vehicle without error.

[0009]

In order to achieve this object, a vehicle theft detection device according to a first aspect of the present invention sets whether or not a vehicle to be monitored is in an operating state for detecting theft. A theft detection state setting means, and when the air pressure detected by the tire air pressure sensor attached to the tire of the vehicle changes by a predetermined amount or more from a predetermined air pressure, a tire air pressure abnormality detection signal is output. Tire pressure abnormality detecting means to be transmitted and a vehicle position for monitoring a planar position on the ground surface of the vehicle by GPS and transmitting a vehicle position movement signal when the vehicle moves beyond a predetermined distance. When the movement detection means and the theft detection state setting means are in the operating state, the tire pressure abnormality detection means sends a tire pressure abnormality signal; A vehicle theft determining means for determining that the vehicle has been stolen when the position movement detecting means has transmitted the vehicle position moving signal; and a predetermined theft occurrence notification when the vehicle theft determining means determines that the theft has occurred. And a car telephone device for notifying the occurrence of theft of the vehicle.

A vehicle theft detection device according to a second aspect of the present invention includes a theft detection state setting means for setting whether or not a vehicle to be monitored is in an operation state for detecting theft, A tire rotation detection signal that sends a tire rotation detection signal when the rotation of the tire exceeds a predetermined rotation angle by detecting a rotation generation signal of the tire from an attached tire rotation detection sensor. Means for monitoring the planar position of the vehicle on the ground surface by GPS, and transmitting a vehicle position movement signal when the vehicle moves beyond a predetermined distance; When the detection state setting means is in the operating state, the tire rotation detection means sends a tire rotation detection signal, and the vehicle position movement detection means sends the vehicle position movement signal. Vehicle theft determining means for determining that the vehicle has been stolen, and an automobile telephone for notifying a predetermined theft occurrence notification destination of the theft of the vehicle when the vehicle theft determining means determines that the theft has occurred. And a device.

A vehicle theft detection device according to a third aspect of the present invention includes a theft detection state setting means for setting whether or not a vehicle to be monitored is in an operating state for detecting theft, Tire air pressure abnormality detecting means for transmitting a tire air pressure abnormality detection signal when an air pressure detected by an attached tire air pressure sensor decreases by a predetermined amount or more from a predetermined air pressure; A tire rotation detection signal from a tire rotation detection sensor attached to the tire is detected, and when it is detected that the rotation of the tire exceeds a predetermined rotation angle, a tire rotation detection signal is transmitted. Tire rotation detection means, and a planar position on the ground surface of the vehicle is monitored by GPS, and when the vehicle moves beyond a predetermined distance, the vehicle position shifts. Vehicle position movement detecting means for transmitting a signal, and when the theft detection state setting means is in the operating state, when the tire air pressure abnormality detecting means transmits a tire air pressure abnormality signal, or the tire rotation detecting means Sends a tire rotation detection signal, and when the vehicle position movement detection means sends the vehicle position movement signal, the vehicle theft determination means for determining that the vehicle has been stolen; and the vehicle theft determination means. When the vehicle is determined to have been stolen, a vehicle telephone device that reports the theft of the vehicle to a preset theft notification destination is provided.

[0012]

FIG. 1 is a block circuit diagram showing an embodiment of a vehicle theft detecting apparatus according to the present invention. In FIG. 1, reference numeral 21 denotes a vehicle theft detection unit mounted on a vehicle, which includes a theft detection state setting circuit 22 and a vehicle theft occurrence determination circuit 2
3, a vehicle tire pressure abnormality detection circuit 24, a tire rotation detection circuit 25, and a vehicle position movement detection circuit 26. Reference numeral 27 denotes an automobile telephone device mounted on the vehicle, which normally communicates with a fixed telephone, a mobile telephone, or a PHS via a wireless base station 29 connected to a public telephone line 28 by an exchange (not shown) or the like. Can be. Further, the on / off of the theft detection state setting circuit 22 can be controlled from an external portable telephone or the like via the car telephone device 27. When the theft occurrence determination circuit 23 determines that the theft has occurred, it is also used to notify the occurrence of the theft from the automobile telephone device 27 to a predetermined report destination.

Reference numeral 30 denotes a GPS (Global Positioning System).
m) to measure the position of a vehicle or the like equipped with the GPS based on the delay time of radio waves received from a plurality of mobile satellites. Reference numeral 31 denotes a tire air pressure sensor mounted on any of the tires of the vehicle, and transmits a detection output of the air pressure sensor 31 to the tire air pressure abnormality detection circuit 24 by a radio frequency signal. The air pressure sensor 31 is disclosed in, for example, Japanese Patent Application Laid-Open No. 5-126666.
A pressure signal transmission circuit section embedded in the tire / wheel of the vehicle, a pressure indicator for receiving the tire pressure information signal and displaying the pressure, as in a “tire pressure detection device”, and reporting abnormal pressure. And a pressure signal receiving circuit having an abnormal pressure alarm and the like.

Japanese Patent Application Laid-Open No. 8-178784 entitled "Tire Pressure Alarm" shows a specific structure to be mounted on a tire valve. This tire pressure alarm device is provided with a function of injecting air into the tire, and is of a wireless impeccable type. The switch unit A detects that the tire air pressure has fallen below a predetermined value. The antenna is electrically connected to the transmitting unit C via B, and the antenna of the transmitting unit C transmits an abnormal signal as a radio frequency signal to the receiving device in the vehicle compartment. The air pressure sensor 31 according to the present invention is of a type having a wireless function that has been conventionally existing as described above, and an air pressure signal transmitted from the air pressure sensor 31 by a radio frequency is a tire air pressure abnormality detection circuit 24. Received at.

Reference numeral 32 denotes a tire rotation sensor which is mounted on any tire of the vehicle, detects rotation of the tire, and transmits the detected signal to the tire rotation detection circuit 25 as a radio frequency signal. As an example of the tire rotation sensor 32,
As disclosed in JP-A-11-248725 "Tire rotation sensor", for example, a rod-shaped piezoelectric element is attached to a radially inner surface of a tread portion of a tire as a contact member having two separate attachment portions, and the contact member (piezoelectric sensor) is provided. An output pulse is generated for each rotation of the tire by utilizing the fact that the mounting portion of the element) is deformed in a ground contact area with the ground and returns to a normal shape by detachment from the ground contact area. Is counted and the number of revolutions is stored, and is transmitted to a receiver outside the tire or a vehicle outside the vehicle to which the tire is attached in response to a request.

As another example, see Japanese Patent Application Laid-Open No. 9-508.
488 "Active integrated circuit transponder and sensor device for transmitting vehicle tire variable data"
Transponder 10 installed in the tire inner liner
Is provided with a tire rotation detector 120. The rotation detector 120 is like a magnetic detector that responds to an externally generated magnetic field generated every time the tire rotates 360 °. The output of the rotation detector 120 is input to a counter 122 that stores the total number of rotations of the tire. You.
Upon receiving a signal from the radio frequency identification communicator 18, the counter 122 outputs the C signal via the digital I / C port 26.
The total number of rotations of the tire is sent to the PU 20. These data are intended to be transmitted to a remote question source unit 80.

Further, instead of the tire rotation sensor 32, the rotation of the tire may be detected as the rotation of the axle and detected from a mechanism coupled to a speedometer. 33 is a lock sensor for detecting the lock of the door for getting on and off the vehicle,
On / off of the theft detection state setting circuit 22 can be controlled also by the lock information from the lock sensor 33. Although not shown, a power supply for operating the circuits and various sensors is provided commonly or individually.

Next, the operation of the block circuit diagram shown in FIG. 1 will be described with reference to the flowchart shown in FIG. First, in order to put the vehicle theft detection unit 21 into an operating state, the mobile phone 2
7 is turned on, and the password for control is transmitted to turn on the theft detection state setting circuit 22, or the theft detection state setting circuit 22 is turned on by the lock information (signal) from the lock sensor 33 in conjunction with locking. State, and can be turned off by unlocking. Further, a switch can be directly provided in the theft detection state setting circuit 22 and the switch can be controlled by an on / off operation. This theft detection state setting circuit 22
Is turned on, a start mode (step S01 in the flowchart) is set, and the theft occurrence determination circuit 23, the tire air pressure abnormality detection circuit 24, the tire rotation detection circuit 25, and the position movement detection circuit 26 are set to the operation state (S02).

In this theft monitoring state, the rotation of the tire is monitored by the tire rotation sensor 32 (S03), and the state where the rotation is not detected is measured for S seconds, for example, about 10 seconds (S04). The tire pressure AP 'is measured by the sensor 31 (S05). The measured tire air pressure AP 'is compared with a preset air pressure AP by the tire air pressure abnormality detection circuit 24 (S0
6) If there is no change, the state is returned to the state before the tire rotation was detected. When the tire air pressure AP 'does not match the preset air pressure AP and the state in which the pressure is reduced is measured for T seconds, for example, about 60 seconds (S07), the position movement detection circuit 26 The position measurement data LP ′ from the GPS 30 (S08) is compared with the reference position data LP at the beginning of the theft detection state setting by this device (S09).

When the rotation of the tire is detected by monitoring the tire rotation sensor 32 (S03), the rotation is measured for T seconds, for example, about 60 seconds (1 minute) (S30).
07), position movement detection (S
Move on to step 08). Initial vehicle position measurement data LP set to the theft detection state and current vehicle position measurement data L
P 'is compared with the previous position measurement data LP (after the measurement comparison), and when both coincide with each other, the period of the coincidence is measured (S10). 6
Until about 00 seconds (10 minutes) elapse, the tire returns to the position at which the change in the air pressure of the tire or the rotation of the tire is detected. If this coincidence has elapsed X seconds, the start mode (S
01) Return to the position after.

In the comparison between the previous position measurement data LP and the current position measurement data LP '(S09), if the difference between the two measurement data differs by a predetermined distance, for example, 20 m or more, that is, the movement of the vehicle is detected. In this case, the theft occurrence determination circuit 23 determines that the theft has occurred (S11), activates the automobile telephone device 27, and sets in advance by the automatic dialing device, for example, the owner's house of the vehicle, a police station, vehicle management. The report destination such as the center is notified of the occurrence of theft (S12).

The relationship between the above-described operation and the stolen state will be described. If the rotation of the tire is detected, the brake is released by any method and the engine is started to move or the vehicle is moved by another vehicle or the like. When the vehicle is towed, it is detected by the tire rotation sensor 32 and used as a trigger for the occurrence of theft. Further, the presence or absence of the movement of the vehicle is monitored, and when the movement is detected, it is determined that theft has occurred. . In addition, when a large theft team steals a vehicle by lifting it with a crane, it detects a decrease in tire air pressure due to the removal of the weight of the vehicle body that had been applied to the tire and used as a trigger for theft, Further, in the same manner as described above, it is determined that theft has occurred when the movement of the position of the vehicle is detected.

An example of preliminary notification of the sign of vehicle theft will be described with reference to the flowchart shown in FIG. The flowchart of FIG. 3 is obtained by adding a report point to the flowchart of FIG. That is,
When it is detected that the tires of the vehicle in the theft detection state have rotated, or when it has been detected that the air pressure of the tires has decreased, it is notified that some sort of status change has occurred in the vehicle at the destination. This is a notification 1 (S06 ').

Thereafter, when the movement of the vehicle position is detected by the position measurement, it is determined that the theft has occurred, and the occurrence of the theft is transmitted to the report destination as a report 2 (S12). Also,
After the notification 1 (S06 ') to the notification destination that the status change of the vehicle has occurred, if the position movement of the vehicle is not detected after X seconds, the transmission of the notification 1 is mischief. Report 3 (S10 ')
). By reporting in such a procedure, it is possible to quickly respond to the occurrence of theft of the vehicle.

According to the present invention, after the occurrence of theft is detected and the occurrence of theft is reported to a predetermined report destination, the current position information of the vehicle from the GPS 30 is transmitted from the car telephone device 27 to the report destination at a required time interval. The transmission is continued so that the current position of the stolen vehicle can be tracked. In addition, after the vehicle is stolen, the tracking position of the vehicle is checked based on a request for transmission of the current position information by telephone from the side notified of the theft occurrence, from the vehicle telephone device 27 of the stolen vehicle to the reporting destination. Information may be transmitted.

[0026]

As described above in detail, according to the present invention, when the vehicle is stolen, the change in tire air pressure or the rotation of the tire is detected and the plane of the vehicle is detected. It detects the presence or absence of the target position movement, and determines that theft has occurred when two phenomena are detected, that is, the detection of the position movement and the change in the tire air pressure or the rotation of the tire. In addition, the accuracy of the change of the position movement can be reduced, and the occurrence of theft can be detected quickly and without error. In addition, since the moving state of the stolen vehicle after the theft has occurred can be tracked, the stolen vehicle can be reliably found.

[Brief description of the drawings]

FIG. 1 is a block circuit diagram showing an embodiment of a vehicle theft monitoring device according to the present invention.

FIG. 2 is a flowchart for explaining the operation of a block circuit diagram showing one embodiment of the present invention.

FIG. 3 is a flowchart for explaining another example of the notification in the vehicle theft monitoring of the present invention.

FIG. 4 is a circuit block diagram illustrating an example of a conventional vehicle anti-theft device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Key 2 Transponder chip 3 Antenna 4 Amplifier 5 Immobilizer unit 6 Engine control unit 7 Vehicle communication device 7a Control circuit 7b Locator circuit 7c Modem circuit 8 GPS 9 Car telephone device 10 Horn 11 Crusher headlamp 12 Alarm unit 21 Vehicle theft detecting unit 22 Theft detection state setting circuit 23 Theft occurrence determination circuit 24 Tire pressure abnormality detection circuit 25 Tire rotation detection circuit 26 Position movement detection circuit 27 Car telephone device 28 Public telephone line 29 Radio base station 30 GPS 31 Tire air pressure sensor 32 Tire rotation sensor 33 Locking sensor

Claims (6)

[Claims] 1. A theft detection state setting means for setting whether or not a vehicle to be monitored is in an operation state for detecting theft, and an air pressure detected by a tire air pressure sensor attached to a tire of the vehicle. A tire air pressure abnormality detecting means for sending a tire air pressure abnormality detection signal when the air pressure decreases by a predetermined amount or more from a predetermined air pressure; and monitoring a planar position on the ground surface of the vehicle by GPS. And a vehicle position movement detecting means for transmitting a vehicle position movement signal when the vehicle moves beyond a predetermined distance; and when the theft detection state setting means is in the operating state, the tire pressure abnormality is detected. The vehicle is stolen when the detection means sends a tire pressure abnormal signal and the vehicle position movement detection means sends the vehicle position movement signal. Vehicle theft detection means, comprising: a vehicle theft determining means for determining that the vehicle has been stolen; and a car telephone apparatus for notifying a predetermined theft occurrence notification destination of the occurrence of the vehicle when the vehicle theft determining means determines that the theft has occurred. . 2. A theft detection state setting means for setting whether or not the vehicle to be monitored is in an operation state for detecting theft, and rotation of the tire from a tire rotation detection sensor attached to the tire of the vehicle. A tire rotation detecting means for transmitting a tire rotation detection signal when the rotation of the tire exceeds a predetermined rotation angle by detecting the generated signal; A position monitoring unit that monitors a position by GPS and sends a vehicle position movement signal when the vehicle moves beyond a predetermined distance; and when the theft detection state setting unit is in the operating state, It is determined that the vehicle has been stolen when the tire rotation detection means sends a tire rotation detection signal and the vehicle position movement detection means sends the vehicle position movement signal. A vehicle theft detecting device comprising: a vehicle theft determining means; and an automobile telephone device for notifying a predetermined theft report destination of the theft occurrence of the vehicle when the vehicle theft determining means determines that the theft has occurred. 3. A theft detection state setting means for setting whether or not the vehicle to be monitored is in an operation state for detecting theft, and an air pressure detected by a tire air pressure sensor attached to a tire of the vehicle. However, when there is a change of more than a predetermined air pressure decreases by a predetermined amount or more, a tire air pressure abnormality detection unit that sends out a tire air pressure abnormality detection signal, and a tire rotation detection sensor attached to the tire of the vehicle. A tire rotation detecting means for detecting a rotation generation signal of the tire and transmitting a tire rotation detection signal when it is detected that the rotation of the tire has exceeded a predetermined rotation angle; Vehicle position movement detection means for monitoring the planar position of the vehicle by GPS, and transmitting a vehicle position movement signal when the vehicle moves beyond a predetermined distance; When the theft detection state setting means is in the operating state, when the tire pressure abnormality detection means sends a tire pressure abnormality signal, or when the tire rotation detection means sends a tire rotation detection signal. When the vehicle position movement detection means sends the vehicle position movement signal, the vehicle theft determination means determines that the vehicle has been stolen; and when the vehicle theft determination means determines that theft has occurred, the vehicle theft is set in advance. A vehicle theft detection device for notifying a theft occurrence report destination of the theft occurrence of the vehicle. 4. When the vehicle theft determining means of the vehicle determines that the vehicle has been stolen, the current position information of the vehicle detected by the GPS is determined at a required time interval by the car telephone apparatus of the vehicle. The vehicle theft detection device according to claim 1, wherein the vehicle theft detection device is transmitted to the theft occurrence notification destination via an external device. 5. The vehicle theft determination means of the vehicle determines that the vehicle has been stolen, and reports the theft occurrence to the theft report destination, and then reports the theft to the car telephone device of the vehicle from the report destination. The vehicle according to claim 1, 2 or 3, wherein the current position information of the vehicle detected by the GPS is transmitted to the theft occurrence report destination via the car telephone device based on a request for transmitting the current position information of the vehicle. The vehicle theft detection device according to any one of the preceding claims. 6. The tire air pressure abnormality detecting means of the vehicle detects that the tire air pressure has decreased by a predetermined value or more, or the tire rotation detecting means has detected that the rotation of the tire has exceeded a predetermined rotation angle. When it detects that
The vehicle theft detection device according to claim 1, wherein the destination of the theft occurrence is notified of a situation change in the vehicle.