| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a fence sensor exhibiting excellent detection stability without using a field generating current or infrared rays. SOLUTION: The fence sensor comprises one or more support 2, flexible detection electrodes 8, 9, 10 provided between the supports 2, a reference electrode insulated from the detection electrodes, and a circuit 20 for detecting the variation of capacitance between the detection electrode and the reference electrode caused by an object to be detected existing in a detectable region.</p> |
