| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve security against illegal operation planned carefully. <P>SOLUTION: An antenna 91 is installed inside a region 81 being a regular LF communication area outside a vehicle to receive a request signal by an LF communication signal outside the vehicle transmitted from a door knob antenna 22 and supply the received request signal into an amplifier 92, which amplifies the request signal and transmits it through an antenna 93. Consequently, a region 82 as an illegal LF communication area outside the vehicle where the request signal by the LF communication signal outside the vehicle can be received is formed. When an answer signal corresponding to the request signal of the LF communication signal outside the vehicle is properly received, whether a door can be unlocked or not is controlled after determining whether an output value of the acceleration sensor exceeds the threshold value set in advance or not. <P>COPYRIGHT: (C)2010,JPO&INPIT |
