| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an anti-theft device for a vehicle and an anti-theft system using the device capable of precluding issuing of a mis-notification and of sensing a burglary of the vehicle with high precision. <P>SOLUTION: A judging part 31 is fed with an electric signal as the jack-up signal which is given by a jack-up sensing part 10 and complying with existence or absence of jack-up of a jack installed in the vehicle, and is fed with an electric signal as the tilt signal which is given by a tilt sensor 20 and complying with the level of the sensed output of the vehicle tilt. Under such a definition that the value showing the jack having been installed under the vehicle signifies a first threshold while the value showing the tilt angle of the vehicle when it is presumed as being stolen signifies a second threshold, judgement as the vehicle being stolen is passed in case the value indicated by the jack-up signal exceeds the first threshold and the value indicated by the tilt signal exceeds the second threshold. <P>COPYRIGHT: (C)2008,JPO&INPIT</p> |
