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Signal processing system of optical fiber interference sensor and optical fiber interference sensor, signal processing manner and record media
Signal processing system of optical fiber interference sensor and optical fiber interference sensor, signal processing manner and record media
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机译：光纤干扰传感器的信号处理系统及光纤干扰传感器，信号处理方式和记录介质
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摘要
PROBLEM TO BE SOLVED: To effectively remove or suppress effects due to unwanted signal components, such as low-frequency fluctuation, noise or the like, using simple constitution and to obtain a highly accurate measured result, even with the simple adjustment of an optical system.;SOLUTION: A signal-processing part 14 extracts a light correlating signal from the signal, obtained from a linear image sensor 11 through an image sensor control part 12 and an A/D converter 13 and removes unwanted high and low frequency components of the light correlating signal and is subjected to the output thereof to Hilbert transformation to shift the phase by 90°. The square root of the square sum of the signal, from which the unwanted components are removed and the output where the phase thereof is shifted by 90° is calculated on the basis of the signal from which the unwanted components are previously removed and the signal shifted in phase by 90° and an envelop component obtained by removing the high-frequency unwanted components thereof is smoothed and differentiated to calculate the zero-crossing point.;COPYRIGHT: (C)2001,JPO
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