Patent ID: 7489049

Claim:
An antitheft system provided with: a control system arranged on a self-propelling movable object with an engine mounted thereon as a drive source and having a position detecting means for detecting a position of said movable object, a transmission/reception means for performing a transmission/reception to/from an outside and a processing means for performing predetermined processing operations including outputs of run commands to said position detecting means and said transmission/reception means, and a control server arranged at a place different from said movable object for controlling information on said movable object, said information comprising position information detected by said position detecting means and transmitted via said transmission/reception means, characterized in that said antitheft system comprises: a clocking means, a first power feeding means for performing feeding of power to at least said position detecting means, and a second power feeding means for performing feeding of power to at least said clocking means; and said processing means receives signals from said clocking means, allows said first power feeding means to continuously feed power until a first predetermined time elapses from a time point at which a stop signal for said engine is inputted, and after an elapse of said first predetermined time, repeatedly outputs an instruction signal, which permits feeding of power, at predetermined time intervals to said first power feeding means; and wherein said control system is provided with a storage means for storing said position information on said movable object as detected by said position detecting means; and said processing means compares position information, which has been detected subsequent to said input of said stop signal for said engine, with said position information stored in said storage means and, when a distance difference of at least a predetermined value is confirmed, determines that said movable object has been stolen, and instructs said transmission/reception means to transmit a theft signal together with said position information to said control server.