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Indexed by:会议论文

Date of Publication:2011-12-11

Included Journals:EI、Scopus

Abstract:In this work, one novel kind of Fiber Optical Brillouin Displacement sensor was proposed and developed using metal spring. Two little pulleys with inner diameter of 18mm were used to fix the optical circles together, then single mode optical fiber was winded along the pulleys into optical loops. When two pulleys were tensioned, optical fiber in loops will be tensioned. One end of metal spring with diameter of 5mm was connected to one pulley, with another end was fixed. If there is displacement change between fixed end of spring and the pulley that didn't attached to spring, metal spring could convert the displacement change to strain change of optical fiber in loops. And then calibrating test was conducted to study the displacement sensitivity of the sensor, results show that there were good linear relationship between displacement and Brillouin frequency. This kind of Brillouin displacement sensor is featured with cheap cost, long measurement range, and distributed sensing ability, which can be applied to field works on structural health monitoring.