| 摘要 |
PURPOSE:To provide a security system using position information, detected by a GPS, as codes. CONSTITUTION:Position information computed by a receiving part 12 on the basis of radio wave transmitted from a GPS satellite 11 is stored in a GPS memory 13 and transmitted to a car stereo 20 through a data bus 30. In the car stereo 20, as long as judged to be connected to a battery 40 by a power monitoring part 24, a relay 26 is excited through a security part 25 to supply power to a body 26, and the storage of a memory 23 is updated, and at the time of judging the battery 40 to be detached, the contents of the GPS memory 13 and memory 23 are frozen. At the time of being connected again to the battery 40, the contents of the GPS memory and memory are collated, and only at the time of coincidence, the relay 261 is excited to release security. |
