| 摘要 |
<p>An unauthorized use preventing device includes: a first measuring unit (11) that measures a global position thereof and outputs the global position as first position information (Ps); and a first transmission unit (12) that wirelessly transmits the first position information to an outside. The security section includes: a second measuring unit (22) that measures a global position thereof and outputs the global position as second position information (Pp); a first receiving unit (21) that receives the first position information; a position comparison unit (23) that determines whether an inter-instrument distance calculated based on the first and second position information is less than a threshold distance or equal to or more than the threshold distance, and outputs a result of the determination as a position comparison result signal (c); and a logical product calculation unit (24) that calculates and outputs a logical product of the position comparison result signal (c) and a power supply turning-on signal (Pon).</p> |
