J0404-5-3 偏波保持FBGを用いたひずみ・温度の光ファイバ分布センシング([J0404-5]知的材料・構造システム(5):損傷検知・診断・モニタリングIII)

概要

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The strain or temperature distribution can be measured by optical frequency domain reflectometry (OFDR) using fiber Bragg gratings (FBG) with high spatial resolution. In general, however, one needs to compensate temperature/strain effects during strain/temperature measurement because of the Bragg wavelength sensitivity to both of them. In this paper, we implemented simultaneous strain and temperature sensing with FBG inscribed into polarization-maintaining fiber. First we constructed a numerical model of OFDR using polarization-maintaining FBG for the necessity of analysis about polarization interference and polarized Bragg wavelengths behavior. After assessments of simultaneous measurement capability through numerical simulations, we implemented simultaneous strain and temperature sensing experiments with OFDR distributed sensing. The results showed the practical capability of simultaneous measurement with distributed sensing.
一般社団法人日本機械学会の論文
2010-09-04