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OPTICAL FIBER INTERFERENCE SENSOR, SIGNAL PROCESSING SYSTEM AND SIGNAL PROCESSING METHOD FOR OPTICAL FIBER INTERFERENCE SENSOR, AND STORAGE MEDIUM
OPTICAL FIBER INTERFERENCE SENSOR, SIGNAL PROCESSING SYSTEM AND SIGNAL PROCESSING METHOD FOR OPTICAL FIBER INTERFERENCE SENSOR, AND STORAGE MEDIUM
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机译：光纤干扰传感器，光纤干扰传感器的信号处理系统和信号处理方法以及存储介质
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摘要
PROBLEM TO BE SOLVED: To provide a precise measurement result by simple adjustment of an optical system and simple signal processing of a detection signal by effectively suppress the influence of an unnecessary signal component such as low frequency fluctuation, noise or the like.;SOLUTION: The output light modulated in wavelength of a Fabry-Pelrot type load cell 6 based on the light of a light source 11 generating a low coherence light of a wide band is incident on a gap variable Fabry-Pelrot interferometer 8. The light intensity of the interferometer 8 is minimized in the vicinity of the sensor gap of the load cell 6 and detected as a light correlation signal by an optical detector 9. A signal processing part 12 extracts a required light correlation signal from the signals of time series obtained from the optical detector 9 through an optical power meter 10 and/or an A/D converter 11 and removes the high frequency noise component of the optical correlation signal by low pass filter processing followed by smoothing and differentiating to determine a zero cross point where the differential value crosses zero level.;COPYRIGHT: (C)2002,JPO
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