JPH10138875A - Theft detection device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To carry out highly precise burglary detection in simple constitution by providing a comparison means to compare a bearing detected by a bearing detection means at the time of restarting a vehicle and a bearing memorized in a parking and stopping information memory means with each other. SOLUTION: A forwarding direction is detected by output of a bearing sensor 16 in the case when an ignition is ON. Thereafter, the detected forwarding direction is compared with a forwarding direction at the time of parking memorized in a memory 22. When they match with each other, a current position is taken in from output of a GPS device 14, and this current position is compared with the position at the time of parking memorized in the memory 22. When these positions match with each other, it is judged as normal and processing is finished. In the meantime, in the case when they don't match, that is, in the case when the bearing or the current position is different from that at the time of parking, it is judged as abnormal starting, ignition of a plug and fuel injection is prohibited on an engine ECU 26, and a vehicle is made in an immovable state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle theft detection device for detecting theft based on a change in vehicle status before and after parking and stopping.

[0002]

2. Description of the Related Art Conventionally, various anti-theft devices have been proposed. For example, a device that incorporates a transmitter that transmits a predetermined code to an ignition key and checks the code at the time of startup has been put to practical use.

In the device described in Japanese Patent Publication No. 7-509203, a GPS (Global Positioning System) is used.
The system shows a theft detection device that takes into account position information detected by the device and map information stored in advance.

[0004]

However, in the above-mentioned conventional example, when the detected value of the GPS device is used for theft detection, it takes some time to specify the position. Also, depending on the location, the GPS device may not be able to detect the position. Therefore, the theft could not be detected with sufficient accuracy.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a vehicle theft detection device capable of performing a highly accurate theft detection with a simple configuration.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a vehicle theft detecting device for detecting theft based on a change in the vehicle state before and after parking and stopping, and a direction detecting means for detecting the direction of the vehicle;
Parking and stopping information storage means for storing the direction at the start of parking and stopping, and comparing means for comparing the direction detected by the direction detecting means when the vehicle is restarted with the direction stored in the parking and stopping information storing means And detecting theft based on the comparison result of the comparing means.

As described above, according to the present invention, the azimuth is detected when the vehicle is restarted, and it is determined whether or not the azimuth is different from the time when the vehicle is parked and stopped. Therefore, when the vehicle is stolen and the vehicle is unjustly moved, it can be detected. Therefore, an alarm can be sounded or the engine can be immobilized based on the detection of the theft. The azimuth sensor may have a relatively simple configuration, and the device as a whole can be configured with a simple configuration.

Further, the present invention further provides a map information storage means for storing map information, a vehicle position detecting means for detecting a vehicle position, and other transportation means according to the vehicle position on the map. On-board movement detection means for detecting that the vehicle is moving with the own vehicle mounted thereon, wherein the theft is detected by recognizing the movement of the vehicle by another transportation means.

[0009] Since a movement by a ferry boat or a car train can be detected, erroneous detection of theft can be prevented.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention (hereinafter referred to as embodiments) will be described below with reference to the drawings. FIG. 1 is a block diagram showing the overall configuration of an anti-theft device using the anti-theft device of the present embodiment.

The navigation ECU 10 performs various processes for route guidance, and is connected to a map database 12 for storing map data, a GPS device 14 for detecting the current position, a direction sensor 16 for detecting the direction of the vehicle, and the like. Have been. Then, the navigation ECU 10 reads the map data including the current location from the map database 12 according to the current location detected by the GPS device 14, and displays this on the display together with the current location display. When the destination is set, the optimum route to the destination is searched for using the map data stored in the map database 12,
When the route is set, the set route is displayed to provide route guidance.

The direction sensor 16 includes a geomagnetic sensor, a gyro, and the like, and detects the direction (direction) of the vehicle. The navigation ECU 10 supplements the position data from the GPS device 14 based on the azimuth data from the azimuth sensor 16 and the mileage data from a mileage sensor (not shown).

The navigation ECU 10 includes a multimedia EC.
U20 is connected. This multimedia ECU2
0 controls various in-vehicle devices and detects theft of a vehicle. A memory 22 is connected to the multimedia ECU 20, and various data are stored therein. An IG switch 24 is connected to the multimedia ECU 20, and the ON / OFF state of the IG switch 24 is supplied to the multimedia ECU 20. Further, an engine ECU 26 is connected to the multimedia ECU 20, and when theft is detected, the engine ECU 26 immobilizes the engine.

Next, the operation of the multimedia ECU 20 for preventing theft will be described with reference to FIGS. First, the processing at the time of parking will be described with reference to FIG. In this process, first, it is determined whether a prohibition procedure for prohibiting the operation of the anti-theft device is performed (S11).
If the prohibition procedure has been performed, the process for preventing theft is unnecessary, and the process is terminated as it is. In this prohibition procedure, a dedicated button or the like may be provided, but it is preferable to use an operation of an existing device such as pressing a door lock twice.

If the prohibition procedure has not been taken,
It is determined from the state of the IG switch 24 whether the ignition is off (S12). If it is off, it is next determined whether the key is in the key cylinder (S13). If the ignition is off and the key is removed, the vehicle is considered to have stopped and the driver is away from the vehicle. Therefore, it is determined that the vehicle is parked (S14).

A current position A obtained by the GPS device 14 and a traveling direction B obtained by the direction sensor 16
Is received by the multimedia ECU 20 via the navigation ECU 10 and stored in the memory 22 (S15).

Next, the process at the time of starting the engine will be described with reference to FIG. First, it is determined whether the ignition is on (S21). If the ignition is on, the traveling direction C is detected from the output of the direction sensor 16 (S22). Then, the detected traveling direction C is compared with the traveling direction B during parking stored in the memory 22 (S23). If they match, the current position D is fetched from the output of the GPS device 14 (S24), and this current position D is compared with the parking position A stored in the memory 22 (S25). If the positions A and D match, it is determined that the position is normal (S26), and the process ends.

On the other hand, in the comparison between S23 and S25, if they do not match, that is, if the bearing or the current location is different from the parking time, it is determined that the vehicle has been started incorrectly (S23).
27) In the engine ECU 26, ignition of the plug and fuel injection are prohibited, and the vehicle is immobilized (S2).
8). It is also preferable to generate an alarm sound. Further, the position comparison can be omitted.

As described above, according to this embodiment, when the ignition is turned on to restart the engine, the traveling direction is determined. The determination of the direction of travel is
By comparing the output from the direction sensor 16 with the data stored in the memory 22, the operation can be immediately performed. Therefore, effective starting of the engine can be prohibited. That is,
It takes a certain amount of time to detect the current position by the GPS device 14, and there are cases where position detection cannot be performed. However, azimuth detection can basically be performed immediately at any time. In addition, GPS
When the vehicle is parked in a place where the position cannot be detected by the device 14, the position is undefined at the time of parking and at the time of starting, and it is determined that they match.

With such a configuration, for example, when the vehicle is carried away by the trailer, this can be detected and the start of the vehicle can be prohibited. Here, when the vehicle moves on a ferry boat or a car train, the direction and position are different. Therefore, it is also preferable to detect this and prohibit unnecessary immovable processing for the vehicle. For example, a process as shown in FIG. 4 can be added after S15 in FIG.

That is, it is determined whether a predetermined time (for example, 30 minutes) has elapsed (S31), and if it has elapsed, the position is detected, and it is determined whether this is on a railway (S32) or on a ferry route (S33). I do. Then, in the case of these, the processing at the time of starting in FIG. 3 is not performed (S34). Thereby, the inconvenience based on these movements can be eliminated.

Further, in the case where the engine is started using a valid key or the door is unlocked using a valid wireless key, it is possible not to perform such a theft prevention process. This prevents immovable processing from being performed during legitimate use.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an overall configuration of an apparatus according to an embodiment.

FIG. 2 is a flowchart showing an operation at the time of parking.

FIG. 3 is a flowchart showing an operation at the time of starting an engine.

FIG. 4 is a flowchart showing a determination of movement using another transportation means.

[Explanation of symbols]

10 Navi ECU, 12 Map database, 14 G
PS device, 16 direction sensor, 20 multimedia E
CU, 22 memory, 24 IG switch, 26 engine ECU.

Claims (2)

[Claims] 1. A vehicle theft detection device for detecting theft based on a change in vehicle state before and after parking and stopping, comprising: a direction detecting means for detecting the direction of the vehicle; Information storage means; and a comparison means for comparing the orientation detected by the orientation detection means when the vehicle is restarted with the orientation stored in the parking / stop information storage means, and a comparison result of the comparison means. A theft detection device for a vehicle, wherein the theft is detected based on a vehicle. 2. The apparatus according to claim 1, further comprising: map information storage means for storing map information; own vehicle position detection means for detecting an own vehicle position; And on-board movement detection means for detecting that the own vehicle is moving on another transportation means, and detecting the theft by recognizing the movement of the own vehicle by the other transportation means. Vehicle theft detection device.