| 摘要 |
A bending sensor is provided to install a plurality of bending sensors with one cable and perform self temperature compensation and measure relative displacement by measuring angular variation due to bending measurement. A bending sensor comprises a bending part(7), an external protecting pipe fixture(6), an external protecting pipe(3), a connection rod fixture(12), and a bending sensor connection rod. An optical fiber strain sensor(2) and an electro-resistive strain gauge adhere to the bending part. The bending part is bent in case of physical quantity change including sagging, sinking, and slope. In the external protecting pipe fixture, the bending part and the external protecting pipe are fixed with a external protecting pipe anchoring bolt(5) and a nut(4). The external protecting pipe protects the sensing part from foreign material or external pressure from outside. The external protecting pipe prevents damage to the sensor by limiting the angle changed with bending. The bending sensor connection rod is set up at the connection rod fixture. The bending sensor connection rod is installed between a plurality of bending sensors.
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