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《Journal of Harbin University of Science and Technology》 2007-02
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A Simulation Study of Precise Displacement Sensor Based on Dot Structured Light

ZHAO Hao YU Xiao-yang ZHANG Xiu-bao (College of Measurement-control Technology & Communications Engineering,Harbin Univ.Sci.Tech.,Harbin 150040,China)  
Precision of displacement sensor can not satisfy application requirement in some application field re- quired high precision.For this problem this paper applies 3dsmax and MATLAB to computer simulation study of dot structured light displacement measuring system.First we construct system mathematical model according to trigo- nometry,then use 3dsmax to simulate condition of measurement and constitutors of sensor,including laser projec- tor,camera and measured objects.Last use improved sub-pixel spot center localization method to precisely local- ize spot center of spot images got during simulation and calculate precisely displacement of measured object by MATLAB.A great deal of experiment results indicate,the precision of spot center localization can reach sub-pix- el,and maximum relative error is less than 0.05%,which can satisfy application requirement
【Fund】: 哈尔滨市重点科技攻关计划项目(2005AA1CG152)
【CateGory Index】: TP391.9;TP212.1
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