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《Semiconductor Optoelectronics》 2008-01
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Laser Measurement of Diameter Based on Computer Vision System

SU Zhong,XIA Yan,WU Xi-bao(Beijing Information Technology Institute,Beijing 100101,CHN)  
In order to realize to measure diameter of large cylinder,the computer vision is used to study non-touch meterage for diameter of column shaped workpiece.Measurement system is composed of laser source,two camera,motion guide rail,computer and calibration block.Calibration block is used to calibrate projection matrix of camera and laser plane equation.According to camera,obtained is laser curve image.Then the image is transformed from frame of reference to coordinate system of laser plane.Solved is a space curve equation of the cylinder section sideline and obtained is the diameter in this section.The cylinder diameter whose length and diameter are 8 m and over 300 mm respectively,can be measured point by point automatically.The results show that this system has fast measuring speed and high accuracy.
【Fund】: 中国运载火箭技术研究院资助项目
【CateGory Index】: TN247
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