中国机械工程2012，Vol.23Issue(2)：195-199,5.
复杂型面工件超声自动检测中的匹配定位方法
Matching and Localization Method in Automatic Ultrasonic Testing for Complex Surface Parts
摘要
Abstract
To improve the efficiency and universality of automatic ultrasonic testing for complex surface parts,a matching and localization method was proposed when the CAD model of the part to be tested was given. The position of feature points to match by C--scan ultrasonic measurement data for artificial defect on the tested part was attained firstly. Then an approximate localization method using three corner points as feature points was studied;the initial matching matrix was calculated from the matching of the two local coordinate systems. Lastly,a precise localization was acquired according to the minimum distance principle from the point to the surface,and it was calculated by the cyclic itera- tive method and Menq algorithm. The results of an example show that the matching error is less than 0.4mm when selecting six sampling points,which can meet the accuracy requirement in automatic ul- trasonic testing for complex surface parts.关键词
复杂型面工件/超声检测/曲面匹配/自动定位Key words
complex surface part/ultrasonic testing/surface matching/automatic localization分类
信息技术与安全科学引用本文复制引用
胡宏伟,李雄兵,倪培君,王向红..复杂型面工件超声自动检测中的匹配定位方法[J].中国机械工程,2012,23(2):195-199,5.基金项目
国家自然科学基金资助项目(51005252) （51005252）
高等学校博士学科点专项科研基金资助项目(20100162120042) （20100162120042）
湖南省自然科学基金资助项目(10JJ5061) （10JJ5061）
