WANG Xuan-ze, HOU Hao, ZHAI Zhong-sheng, et al. Design of micro displacement detecting system based on STM32[J]. 2016, 35(7): 83-86. DOI: 10.13873/J.1000-9787(2016)07-0083-04.
A micro displacement detection system based on STM32 is researched and fabricated. The system uses circuit processing module for restraining DC drift to generate two paths photoelectric signals without DC drift.According to phase characteristics of two paths photoelectric signals
using STM32 synchronous sampling two paths photoelectric signals
using Ellipse fitting algorithm
the leastsquare fitting and phase-unwrapping algorithm to process the acquired datas and workout micro displacement. Field test results indicate that the system satisfies requirements of micro displacement measurement.
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