Patent ID: 8926173
Filing Date: 2015-01-06
Classification: G01M

Abstract:
1. A distributed optical fiber sensor system comprising: an optical modulator for modulating light output from a light source unit into pumping pulse light and transmitting the pumping pulse light to a test optical fiber; an optical circulator for diverging backward-scattered light that is generated in the test optical fiber; an optical filter unit for passing Raman scattered light and Brillouin scattered light included in the backward-scattered light diverged at the optical circulator; and a physical quantity change measurement unit for converting each of the Raman scattered light and the Brillouin scattered light that have passed through the optical filter unit into digital data and separately measuring a change in temperature and a change in a degree of deformation with respect to a distance of the test optical fiber using the digital data, wherein the physical quantity change measurement unit analyzes a frequency component due to Brillouin scattering included in the Brillouin scattered light that has passed through the optical filter unit to measure the change in temperature and the change in the degree of deformation with respect to the distance of the test optical fiber.