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10 August 2015 A positioning algorithm for two-wavelength dual Mach-Zehnder interferometry vibration sensing system
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Proceedings Volume 9620, 2015 International Conference on Optical Instruments and Technology: Optical Sensors and Applications; 962010 (2015) https://doi.org/10.1117/12.2193126
Event: International Conference on Optical Instruments and Technology 2015, 2015, Beijing, China
Abstract
A positioning algorithm for two-wavelength dual Mach-Zehnder interferometry (TDMZI) vibration sensing system is proposed. We employ the reciprocal of the interval between neighboring zero-crossing (NZC) points to represent the frequency distribution of the interference signal in time domain. Meanwhile, these reciprocal points are used to fit a curve and we use cross correlation to estimate the time delay of the two fitted curves. Finally we analysis the positioning error caused by the proposed positioning algorithm and experimentally demonstrate that the algorithm can be used to locating with positioning error of ±50m. This algorithm has a promising potential in long distance two-wavelength vibration sensing system.
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Chunyu Ma, Tiegen Liu, Kun Liu, Junfeng Jiang, Qinnan Chen, Liang Pan, Tianjiao Chai, and Chang He "A positioning algorithm for two-wavelength dual Mach-Zehnder interferometry vibration sensing system", Proc. SPIE 9620, 2015 International Conference on Optical Instruments and Technology: Optical Sensors and Applications, 962010 (10 August 2015); https://doi.org/10.1117/12.2193126
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