INCLINOMETER USING FIBER BRAGG GRATING SENSOR

摘要

PURPOSE: A clinometer using a fiber bragg grating sensor is provided to enable gradient to be accurately measured at high precision since deformation rate according to gradient is measured using the fiber bragg grating sensor. CONSTITUTION: A clinometer using a fiber bragg grating sensor comprises optical fiber(10), circular frames(20), and a rotating pendulum(30). The optical fiber comprises a fiber bragg grating sensor for measuring deformation rate. The circular frames are arranged at a given interval. The optical fiber is wound on the circular frames in a tension state, and thus the circular frames maintain a free-strain state in the tension direction of the optical fiber. The rotating pendulum comprises a rotor(32). The rotating pendulum is able to rotate toward a vertical direction, in which gravity always is applied. One end of the rotating pendulum is coupled to two optical fibers, which are wound on the circular frames and are arranged side by side.