Spectrograph-based optical displacement sensor signal demodulation method
A displacement sensor and signal demodulation technology, used in instruments, optical devices, measuring devices, etc., can solve the problems of incident light incident angle deviation, erroneous displacement information, increasing difficulty in calculation and solution, and eliminate processing and assembly errors. , the effect of improving calculation accuracy and shortening data processing time
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[0025] Step 1: The optical displacement sensor outputs a narrow-band diffracted light signal to the spectrometer;
[0026] Step 2: The spectrometer selects the HR4000 type of Haiyang Company to read the spectral information of the narrow-band diffracted light;
[0027] Step 3: The spectrometer inputs the corresponding array data of wavelength λ and light intensity I in the spectral information to the computer. The corresponding arrays of wavelength λ and light intensity I are two arrays containing 3648 values. The typical corresponding relationship is as follows figure 2 shown;
[0028] Step 4: The computer processes the corresponding array data of the wavelength λ and the light intensity I by using the half-height width method, and obtains the central wavelength λ of the narrow-band diffracted light 0 . First use the point-by-point comparison method to obtain the maximum value I of the light intensity I MAX , its light intensity value is 9144; after that, the correspondin...
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