| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electronic key system for monitoring a communication terminal taken out of a vehicle while an ignition switch of the vehicle is in an on state, whereby minimally causing a situation where the vehicle is started again with the communication terminal left outside the vehicle. <P>SOLUTION: A cellular phone 21 having a key function is provided with an acceleration sensor 32, movement of the cellular phone 21 is detected by the acceleration sensor 32, and the thus detected movement is sent through Bluetooth communication to a vehicle 1 as acceleration information Sra. The movement of the cellular phone 21 is monitored by the vehicle 1, and when the cellular phone 21 is taken out of the vehicle while an ignition switch 14 is in an on state, the vehicle 1 alerts a user to the cellular phone 21 taken out of the vehicle. <P>COPYRIGHT: (C)2012,JPO&INPIT |
