Interferometeric Fibre Optic Signal Processing based on Wavelet Transform for Subsea Gas Pipeline Leakage Inspection
A fiber-optic interferometric method for subsea gas pipeline leakage detection simulation test was conducted in underwater waveguide lab. The leakage signal with simultaneous phase variation is interferometrically measured based on Sagnac interferometer configuration. The phase signal extraction was by the demodulation technique based on phase generated carrier circuit. The wavelet transform was performed at each spatial resolution of interferemetric signal. It suppressed noise and improve optical signal SNR (signal to noise ratio). Underwater test discussed the possibility of fiber optic interferometer detection underwater pipeline leak event.The results showed it improved null frequency point capture ability in frequency domain and localization accuracy.
Subsea pipe Fiber optic lnterferometeric phase signal Null frequency Wavelet transform
Wang Qiang Wang Xiaowei
Department of Quality and Safety Engineering, China Jiliang University, Hangzhou, Zhejiang, 310O 18, China
国际会议
长沙
英文
1626-1629
2010-03-13（万方平台首次上网日期，不代表论文的发表时间）