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《Opto-Electronic Engineering》 2010-09
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Online Measurement Techniques of Large Forgings in Thermal State

LIU Gui-hua1,3,LIU Xian-yong1,FENG Quan-yuan3,WEI Zhi-yong2,ZHANG Qi-rong2,GAO Guo-fang2(1.School of Information Engineering,Southwest University of Science and Technology,Mianyang 621010,Sichuan Province,China;2.Institute of Chemical Engineering Materials,China Academy of Engineering Physics,Mianyang 621900,Sichuan Province,China;3.School of Information Science & Technology,Southwest Jiaotong University,Chengdu 610031,China)  
To meet the requirement of online measurement of large forgings in thermal state,a method based on structured light stereo vision technique was presented.To solve the problem of the acquirement of structured light strip on the condition of thermal state,the method combined physical filtering and digital filtering to overcome the influence of red thermal radiation,and temporal phase unwrapping structured light technology was also used to improve the optical noise immunity significantly.Multi-view auto registration techniques based on mark balls were adopted to measure large objects.An experimental system has achieved non-contacting 3D measurement of large forging in 15 m distance.The experiment proves that the method has advantage of high-speed and high-precision,and it is also simple and convenient,which can meet the requirements of online measurement of large forging in thermal state.
【Fund】: 四川省科技厅国际合作项目(2009HH0023)
【CateGory Index】: TP274
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