首页|A method of phase demodulation of OFDR based on ARC-DSM algorithm
A method of phase demodulation of OFDR based on ARC-DSM algorithm
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NSTL
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维普
Aiming at low stability and high harmonic distortion of the traditional phase-generated carrier(PGC)demodulation algorithm,we propose a modified demodulation algorithm for distributed strain sensing in phase-sensitive optical fre-quency domain reflectometry(OFDR).The proposed algorithm combines the arctangent function and differen-tial-self-multiplying(ARC-DSM),which eliminates the effect of modulation depth and realizes the high precision strain variation measurements.Simulation results show that distortion and harmonic distortion are effectively sup-pressed by the ARC-DSM algorithm.The minimum variation of the measurable static strain is about 0.3με and the spatial resolution can reach 0.2 m within 270 m range.
LIU Jianfei、Li Chao、FAN Xujun、LUO Mingming、LUAN Nannan、YANG Wenrong
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School of Electronic Information Engineering,Hebei University of Technology,Tianjin 300401,China
State Key Laboratory of Reliability and Intelligence of Electrical Equipment,Hebei University of Technology,Tian-jin 300130,China
NETL
NSTL
万方数据
维普
