Soft subdivision method of moire frange signal of grating
A Moiré fringe and grating technology, applied in the direction of using optical devices, measuring devices, instruments, etc., can solve the problems of residual DC level and DC level, high-order harmonics of signals, and inconsistency of two-channel signal amplitudes, so as to improve the accuracy and Resolution, simple hardware effects
Active Publication Date: 2010-08-25
CHONGQING UNIV OF TECH
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The invention provides a soft subdivision method of a moire frange signal of grating by adopting a micro-processing technology, which generally comprises the following steps of: transforming the information of space domain into time domain to process by using the space-time transformation technology; processing the data via software by using the theoretical modeling technology of time sequence to finish the accurate prediction of time capacity; then returning to the space domain by using the high-speed microprocessor technology and outputting the time pulse with spatial meaning to finish real-time subdivision of the moire frange signal of grating; and finally performing real-time correction on the subdivision error. The invention is applicable to high expansion subdivision of the moire frange signal of grating and improves the precision and resolution of the grating measurement system.
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