Research on micro-displacement measurement system based on monocular vision and laser source tilt placement
A micro-displacement measurement system based on monocular vision and laser source tilt placement is designed.Firstly,the relationship between the central coordinate value of speckle image and the micro-displacement is established according to the measurement principle of the system,and it is concluded that the center coordinate value of the speckle image is composed of the longitudinal position variation and the tangential position variation.Secondly,the experimental results show that when the micro-displacement changes are small,the tangential position variation has a great influence on the central coordinate value of the speckle image.Then the measurement function model dominated by tangential position variation is established through calibration experiments.Finally,the measurement function model is verified by experiment,and the measurement error is analyzed.The experimental results show that in the displacement measurement range of 0～1 mm,the maximum absolute error of measuring micro-displacement of the object using the calibrated measurement function model is 1.16 μm,which meets the requirements of the system measurement precision.
monocular visiontilt placement of laser sourcemicro-displacement measurement
万方数据
维普
