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10 October 2020 Research on grating signal processing based on DSP
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Abstract
Grating displacement measurement technology has been widely used in the field of position detection technology. In order to accurately measure the linear displacement of an object, a contactless displacement measurement technique is proposed. The single grating displacement sensing structure is adopted, and the interference fringes are collected by the linear array CCD camera driven by FPGA (field programmable gate array). The collected grating fringe signals are denoised, counted and subdivided based on DSP (digital signal processor). In this method, the subsequent circuit is simplified since the subdivision and digitization are completed with image capture by CCD simultaneously and the automatic real-time measurement of the target to be measured is realized. At the same time, the precision of the system is analyzed deeply.
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Yong Xu, Chaoming Li, Xinrong Chen, Qing Xu, Haotian Wang, and Zhe Huang "Research on grating signal processing based on DSP", Proc. SPIE 11551, Holography, Diffractive Optics, and Applications X, 115511E (10 October 2020); https://doi.org/10.1117/12.2573371
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