| 摘要 |
<p>PROBLEM TO BE SOLVED: To satisfactorily detect even a light landslide or precursory phenomenon of landslide. SOLUTION: The upper end part of a main wire 1 is fixed to the upper part of the ground having a danger of landslide, a weight 3 is mounted on the lower end part of the main wire 1 to give a downward tensile force to the main wire 1, a stopper 10 is fixed to the middle part of the main wire 1, and detectors 5a, 5b are supported by the stopper 10. A winding drum spring- energized in the winding direction is provided on the detectors 5a, 5b, and the end part of a detecting wire unwound from the winding drum is fixed to the ground, so that the rotating angle of the winding drum is taken out as a landslide detection signal through a speed increasing gear.</p> |
