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《Journal of Shanghai Jiaotong University》 2014-01
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Light Source Optimization of Surface Defect Detection of Brake Master Cylinder Pistons

YANG Zi-qi;XU Li-ming;XIE Bin;LUO Rui;ZHU Zi-xin;School of Mechanical Engineering,Shanghai Jiaotong University;  
The characteristics of the defects on the automotive brake master cylinder piston and the difficulties in visual imaging were analyzed.The tridimensional combination system of multiple light sources was designed,which was suitable for the surface defect detection of the piston.Soft light was designed to reduce the noise in the detection image.The mathematical model of light intensity loss in the process of light emission-reflection-imaging was established.The polarization filtering method was proposed and used on the vertical light source and the camera lens.By choosing the polarizing direction of polarizing film,the brightness of the area without defect and the width of the reflective band could be reduced,and the image contrast enhanced.The defects on the piston surface were systematically image captured with the new light source system.The random sampling experiment with 300sample size shows that the vision inspection after the optimization of light sources has no leak detection.The false positive rate is not more than 2%. The research conclusions can be further applied into other surface defect visual inspection areas.
【CateGory Index】: U463.5
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【Citations】
Chinese Journal Full-text Database 1 Hits
1 HU Song-li,XU Li-ming,XU Kai-zhou,WU Ding-yun,WANG Meng,CHEN Ming(School of Mechanical Engineering,Shanghai Jiaotong University,Shanghai 200240,China);Adaptive Contour Corner Detection of Micro-drill's First Facet[J];Journal of Shanghai Jiaotong University;2009-05
【Co-citations】
Chinese Journal Full-text Database 2 Hits
1 GE Dong-yuan1,2,YAO Xi-fan1,XIANG Wen-Jiang2(1.School of Mechanical & Automotive Engineering,South China University of Technology,Guangzhou 510640,China;2.Department of Mechanical and Energy Engineering,Shaoyang University,Shaoyang 422004,China);Fitting margin projection of micro-drill based onSanger algorithm with lateral connection[J];Optics and Precision Engineering;2011-03
2 Ge Dongyuan1 Yao Xifan1 Xiang Wenjiang2 1School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou,Guangdong,510640,China 2College of Mechanical and Vehicle Engineering,Hunan University,Changsha,Hunan,410082,China;Application of Hybrid Mutation Neural Network and Fuzzy Adaptive Particle-Swarm Optimization Algorithm in Testing of Micro-Drill[J];Acta Optica Sinica;2013-03
【Secondary Citations】
Chinese Journal Full-text Database 1 Hits
1 ZHANG Wen jing, XU Xiao ming, DING Guo jun, YANG Yu pu Dept. of Automation, Shanghai Jiaotong Univ., Shanghai 200030, China;Approach to Extract Feature Points on Boundary Based on Curvature[J];JOURNAL OF SHANGHAI JIAOTONG UNIVERSITY;1999-05
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