Monitoring Technology of Slope Internal Deformation Based on Distributed Optical Fiber

Distributed optical fiber sensing technology has been gradually applied in the field of safety monitoring in recent years due to its low cost, high sensitivity, strong immunity to interference and other advantages. In view of the shortcomings of traditional inclinometer in the practical application of slope internal deformation monitoring, a symmetrical distributed optical fiber inclinometer with four cores was designed and manufactured based on distributed optical fiber technology. The results of the landslide model test showed that the relative errors of the monitoring values of the distributed optical fiber inclinometer (DOFI) were within +/- 5% compared with the measured displacement values of the draw-wire displacement sensor (DWDS), which fully verifies the feasibility of the distributed optical fiber technology applied to the high-precision monitoring of the internal deformation of the slope.