Vehicle theft prevention device

• US 20030034915A1
• Filed: 08/15/2002
• Published: 02/20/2003
• Est. Priority Date: 08/16/2001
• Status: Active Grant

• Current Assignee: Fujitsu Ten Limited (DENSO Corporation)
• Original Assignee: Fujitsu Ten Limited (DENSO Corporation)
• Inventors: Sasaki, Yoshihiro, Yoshimura, Minoru
• Granted Patent: US 6,831,597 B2
• Time in Patent Office: Days
• US Class Current: 342/357.07
• CPC Class Codes: B60R 2325/205 Mobile phones
• CPC Class Codes: B60R 25/102 a signal being sent to a remote location, e.g. a radio signal being transmitted to a police station, a security company or the owner
• CPC Class Codes: B60R 25/33 of global position, e.g. by providing GPS coordinates
• CPC Class Codes: G01S 19/16 Anti-theft; Abduction

Abstract

There is provided a vehicle theft prevention device including a navigation device to detect the position of a vehicle on the earth, a security device to detect that the vehicle has been stolen, and an automobile telephone to transmit the position of the vehicle to a monitoring center after the detection of the theft of the vehicle. When the security device does not detect the theft of the vehicle, a position of the vehicle periodically detected by the navigation device is stored in a memory of the security device. When the theft of the vehicle is detected by the security device, the latest information of the vehicle stored in this memory is transmitted to the monitoring center by the automobile telephone, and the monitoring center can immediately determine the theft and the position of the stolen vehicle.

Claims

1. A theft prevention device comprising:

a position detecting means for detecting a position of a vehicle on the earth;

a theft detecting means for detecting theft of the vehicle; and

a transmitting means, wherein after the theft detecting means detects theft of the vehicle, a position of the vehicle is detected by the position detecting means and transmitted to a predetermined position by the transmitting means,

the theft prevention device further comprising a position storing means for periodically storing a position of the vehicle detected by the position detecting means, wherein when the theft detecting means detects theft of the vehicle, the transmitting means transmits the latest positional information stored in the position storing means.

2. A theft prevention device according to claim 1, further comprising an abnormal state detecting means for detecting an abnormal state of the position detecting means, wherein when the abnormal state detecting means detects an abnormal state of the position detecting means, the transmitting means transmits the latest positional information stored in the position storing means.

4. A theft prevention device according to one of claims 1 to 3, wherein at least the position storing means is accommodated in a casing which is separate from a casing in which the position detecting means is accommodated.

5. A theft prevention device according to one of claims 1 to 3, wherein the position detecting means turns on an electric power source of a circuit necessary for periodically detecting a position of a vehicle and detects the position of the vehicle even in an alert state of the vehicle after the vehicle has stopped or in a state in which the position detecting means does not operate.

6. A theft prevention device according to claim 5, wherein the transmitting means periodically transmits the latest positional information stored in the position storing means even after the completion of the first transmission.

7. A theft prevention device according to one of claims 1 to 3, the position detecting means including:

a first position detecting means in which GPS is utilized; and

a second position detecting means for detecting a position of the vehicle by using a movement parameter of the vehicle and also using an azimuth parameter based on terrestrial magnetism wherein, when the first positional detecting means is out of order, the second positional detecting means detects a position of the vehicle on the basis of the latest positional information stored in the positional storing means, and the transmitting means periodically transmits the position of the vehicle.

8. A theft prevention device according to claim 6, wherein a periodical transmitting period of transmitting a position of the vehicle by the transmitting means is different from a position detecting period of detecting the position of the vehicle by the position detecting means.

9. A theft prevention device according to claim 7, wherein a periodical transmitting period of transmitting a position of the vehicle by the transmitting means is different from a position detecting period of detecting the position of the vehicle by the position detecting means.

10. A theft prevention device according to one of claims 1 to 3, wherein the transmitting means transmits a signal to a monitoring center which monitors the vehicle theft and the abnormal state of the position detecting means at all times when a vehicle theft or the abnormal state of the position detecting device is detected.

11. A theft prevention device according to claim 5, wherein the theft detection means judges that the vehicle has been stolen when a position of the vehicle is greatly different from the previously detected position of the vehicle in the case of periodically detecting a position of the vehicle by the position detecting means.

12. A theft prevention device according to claim 5, wherein the theft detection means judges that the vehicle has been stolen when the position detecting means does not operate in the case of periodically detecting a position of the vehicle by the position detecting means.

3. A theft prevention device comprising:

a position detecting means for detecting a position of a vehicle on the earth;

a theft detecting means for detecting theft of the vehicle; and

a transmitting means, wherein after the theft detecting means detects theft of the vehicle, a position of the vehicle is detected by the position detecting means and transmitted to a predetermined position by the transmitting means,

the theft prevention device further comprising;

a position storing means for periodically storing the position of the vehicle detected by the position detecting means; and

an abnormal state detecting means for detecting an abnormal state of the position detecting means wherein, when the abnormal state detecting means detects an abnormal state of the position detecting means, the transmitting means transmits the latest positional information stored in the position storing means.