DETECTOR FOR DETECTING SLOPE FAILURE IN ROAD

摘要

PROBLEM TO BE SOLVED: To make monitoring continued after slope failure occurs. ;SOLUTION: A steel wire 1 is laid within a monitoring objective range for monitoring the slope failure, a tension converting part 3 for converting tension applied onto the steel wire 1 in the slope failure to apply it onto an optical fiber, and a fiber Bragg grating 32 for converting the tension applied to the optical fiber into a wavelength variation of light are provided outside the monitoring objective range, a light wavelength measuring instrument 5 is connected to the Bragg grating 32, and the tension applied onto the steel wire is obtained based on the measured wavelength variation.;COPYRIGHT: (C)2003,JPO