Vehicle antitheft system and vehicle antitheft method
First Claim
1. A vehicle antitheft system in which verification of encryption codes is made between a mobile unit that a driver carries and an on-vehicle unit that is mounted on a vehicle, and when the encryption codes for verification are coincident, said on-vehicle unit permits the vehicle to move, the vehicle antitheft system comprising:
- mobile unit verification encryption code transmission means for causing a mobile unit verification encryption code having preliminarily been stored in a storage part of said on-vehicle unit to be transmitted to said mobile unit by operation of said driver;
determination means of said mobile unit for determining whether or not said mobile unit verification encryption code having been received is the one that is transmitted from his own vehicle;
reply means of said mobile unit for replying a response signal corresponding to said mobile unit verification encryption code to said on-vehicle unit when the mobile unit verification encryption code that said determination means has received is determined to be transmitted from his own vehicle; and
on-vehicle unit control means for outputting a control signal permitting the vehicle to move in the case where said response signal having been replied corresponds to said mobile unit verification encryption code;
wherein during traveling of the vehicle, said on-vehicle unit control means transmits at regular intervals said mobile unit verification encryption code that is stored in the storage part of said on-vehicle unit to said mobile unit;
said reply means of said mobile unit replies said response signal to said on-vehicle unit every time when said mobile unit verification encryption code is received; and
said control means of said on-vehicle unit updates and stores vehicle environmental information in the storage part of said on-vehicle unit every time when said on-vehicle unit receives said response signal, and, in the case where said on-vehicle unit cannot receive said response signal from said mobile unit, the notification means notifies the driver that the response signal has not been received.
1 Assignment
0 Petitions
Accused Products
Abstract
During traveling a vehicle, an on-vehicle unit control circuit 22 transmits regularly a mobile unit verification encryption code stored in a storage part 23 of an on-vehicle unit 2 to a mobile unit 1; a transmission circuit 10 of the mobile unit 1 replies a response signal to the on-vehicle unit 2 every time the verification code is received; and the control circuit 22 of the on-vehicle unit 2 updates and stores vehicle environmental information in the storage part 23 upon receiving the response signal, and if the on-vehicle unit 2 cannot receive any response signal from the mobile unit 1, a driver is notified with display lamp 53, hazard lamp 54, or alarm buzzer 55 that the response signal has not been received.
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Citations
9 Claims
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1. A vehicle antitheft system in which verification of encryption codes is made between a mobile unit that a driver carries and an on-vehicle unit that is mounted on a vehicle, and when the encryption codes for verification are coincident, said on-vehicle unit permits the vehicle to move, the vehicle antitheft system comprising:
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mobile unit verification encryption code transmission means for causing a mobile unit verification encryption code having preliminarily been stored in a storage part of said on-vehicle unit to be transmitted to said mobile unit by operation of said driver; determination means of said mobile unit for determining whether or not said mobile unit verification encryption code having been received is the one that is transmitted from his own vehicle; reply means of said mobile unit for replying a response signal corresponding to said mobile unit verification encryption code to said on-vehicle unit when the mobile unit verification encryption code that said determination means has received is determined to be transmitted from his own vehicle; and on-vehicle unit control means for outputting a control signal permitting the vehicle to move in the case where said response signal having been replied corresponds to said mobile unit verification encryption code; wherein during traveling of the vehicle, said on-vehicle unit control means transmits at regular intervals said mobile unit verification encryption code that is stored in the storage part of said on-vehicle unit to said mobile unit; said reply means of said mobile unit replies said response signal to said on-vehicle unit every time when said mobile unit verification encryption code is received; and said control means of said on-vehicle unit updates and stores vehicle environmental information in the storage part of said on-vehicle unit every time when said on-vehicle unit receives said response signal, and, in the case where said on-vehicle unit cannot receive said response signal from said mobile unit, the notification means notifies the driver that the response signal has not been received. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A vehicle antitheft method in which verification of encryption codes is made between a mobile unit a driver carries and an on-vehicle unit mounted on a vehicle, and when encryption codes for verification are coincident, said on-vehicle unit permits the vehicle to move, the vehicle antitheft system comprising:
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a mobile unit verification encryption code transmission step for causing a mobile unit verification encryption code having preliminarily been stored in a storage part of said on-vehicle unit to be transmitted to said mobile unit by operation of said driver; a determination step of said mobile unit for determining whether or not said mobile unit verification encryption code having been received is the one that is transmitted from his own vehicle; a reply step of said mobile unit for replying a response signal corresponding to said mobile unit verification encryption code to said on-vehicle unit when a mobile unit verification encryption code received in said determination step is determined to be transmitted from his own vehicle; and an on-vehicle unit control step for outputting a control signal permitting a vehicle to move in the case where said response signal having been replied corresponds to said mobile unit verification encryption code; wherein during traveling of the vehicle, said mobile unit verification encryption code that is stored in a storage part of said on-vehicle unit is transmitted to said mobile unit at regular intervals; in the reply step of said mobile unit, said response signal is replied to said on-vehicle unit every time when said mobile unit verification encryption code is received; the vehicle environmental information is updated and stored in the storage part of said on-vehicle unit every time when said on-vehicle unit receives said response signal; and in the case where said on-vehicle unit cannot receive said response signal from said mobile unit, the driver is notified that the response signal has not been received.
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Specification