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《Powder Metallurgy Industry》 2008-03
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APPLICATION OF NONDESTRUCTIVE EXAMINATION AND PATTERN RECOGNITION TO POWDER INJECTION MOLDING

LI Zhen-gang~1,HE Xin-bo~1,QU Xuan-hui~1,BAN Xiao-juan~2,ZHOU Yu~2(1.School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China)(2.School of Information Engineering University of Science and Technology Beijing 100083,China)  
In terms of intelligent powder injection molding,an efficient and feasible method combining nondestructive examination(NDE) and pattern recognition(PR) is proposed,Two typical defects in powder injection molded semi-finish products were studied.First,industrial computation tomography was used to identify the defects and obtain the images.Then the images were processed by image processing and Fourier conversion.The results of Fourier conversion were used as characteristic parameters to input into the BP neural network.At end,good recognition results were obtained.The reasons and corresponding solutions were obtained when the recognition results were input into expert knowledge database.This method is effective to control defects intelligently.
【CateGory Index】: TF124.39
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