| 摘要 |
PURPOSE:To obtain a sensor having a simple structure and excellent weather proofness by providing a detector to detect the deformation of a corrosion-resistant case capable of being deformed in response to the change of the distance between two points of slope in the inside of the case. CONSTITUTION:When the first wire 13 and the second wire 14 are pulled by the collapse of a slope, the forces are transmitted to the first band 22, the second band 23 and the third band 24 and a thermoplastic resin case 21 is deformed. When the distance between two points is further changed, the contact 28 where weak current flows is pushed by a pusher 29 and broken. If the distance S between the detector 26 and the case 21 is determined in advance, the collapse of the slope can be predicted from a change in the distance between two points of the slope surface by the distance S. |
