光学精密工程2017，Vol.25Issue(9)：2300-2308,9.DOI:10.3788/OPE.20172509.2300
未知相对位置条件下回转体厚度的双激光检测
Thickness measurement of rotary parts with double laser under unknown relative position condition
摘要
Abstract
In order to measure the thickness of large-sized hollow rotating parts , a non-contact measuring method based on double laser displacement sensors was proposed .With unknown relative position between rotating parts and the double laser displacement sensor , the measuring errors induced by the installed eccentricity of rotating pieces as well as the non-collinear relationship between dual-sensor optic axis and the origin were analyzed .Meanwhile ,mathematical model between dual-sensor signals and the thickness of the measured surface position was deduced .Thereby ,the actual thickness value can be extracted from the sensor signals with the aids of the phase difference measurement based on correlation theory , New ton iterative method and the circulation translation method .Through the simulating experiment for the thickness detection algorithm of the rotary body , it is indicated that the relative detection error remains within 0 .5% when the amplitude of the interference component in the detected signal is no greater than 0 .3mm , which can be used as a reference for rotating speed adjustment of the turntable . The analysis on the experimental measurement data shows that the maximum relative translation of two detection signals is 4;with eccentricity compensation and cycle-spinning of the data ,the measurement repeatability error of the thickness detection algorithm is less than 0 .05 mm ,w hich meets the detection precision requirement large-sized hollow rotating parts in any position .关键词
非接触测量/激光技术/厚度检测/回转体/相对位置Key words
non-contact measurement/laser technique/thickness measurement/revolving body/relative position分类
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李加福,唐文彦,张晓琳,王军..未知相对位置条件下回转体厚度的双激光检测[J].光学精密工程,2017,25(9):2300-2308,9.基金项目
国家自然科学基金资助项目(No.61501132) （No.61501132）
上海航天科技创新基金资助项目(No.SAST2015029) （No.SAST2015029）
