| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a non-voltage contact signal from the final output of a sensor without the need for electric power from the outside of a sensor system itself by providing ground surface vibration detecting sensors to detect the vibration of the ground surfaces at a popularity of locations and detecting the occurrence of an avalanche of rocks and earth from their output signals. SOLUTION: Vibration is detected by vibrating plates and is transferred to gears for amplification via gear grooves to provide rotation for D.C. generators 80 and 81. The D.C. generator 80 to output electromotive force due to the rotating operation detecting the vibration of ground surfaces along the x-axis and the z-axis as electric signals and the D.C. generator 81 to output electromotive force due to the rotating operation detecting the vibration of the ground surfaces in the y-axis and the z-axis as electric signals are provided, and each output from them is supplied for a relay driving part via filter parts, a detection part D1, and detection part D2 and a charge-up condenser part common for both of them. A relay K1 is driven by inputting signals of power FET and Q1 to a base by a plurality of diodes.</p> |
