Matching and Localization Method in Automatic Ultrasonic Testing for Complex Surface
Parts

China Mechanical Engineering ›› 2012, Vol. 23 ›› Issue (2): 195-199.

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Matching and Localization Method in Automatic Ultrasonic Testing for Complex Surface

Parts

Hu Hongwei1;Li Xiongbing2;Ni Peijun3;Wang Xianghong1

1.Changsha University of Science and Technology,Changsha,410114

2.Central South University,Changsha,410075

3.The Ningbo Branch of Ordnance Science Institute of China,Ningbo,Zhejiang,315103

Online:2012-01-25 Published:2012-02-14
Supported by:

National Natural Science Foundation of China（No. 51005252）;

Research Fund for the Doctoral Program of Higher Education of China（No. 20100162120042）
Hunan Provincial Natural Science Foundation of China（No. 10JJ5061）

复杂型面工件超声自动检测中的匹配定位方法

胡宏伟1;李雄兵2;倪培君3;王向红1

1.长沙理工大学,长沙,410114

2.中南大学,长沙,410075

3.中国兵器科学研究院宁波分院,宁波,315103

基金资助:
国家自然科学基金资助项目(51005252)；高等学校博士学科点专项科研基金资助项目(20100162120042)；湖南省自然科学基金资助项目(10JJ5061)
National Natural Science Foundation of China（No. 51005252）;

Research Fund for the Doctoral Program of Higher Education of China（No. 20100162120042）
Hunan Provincial Natural Science Foundation of China（No. 10JJ5061）

Abstract

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 iterative 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 ultrasonic testing for complex surface parts.

Key words: complex surface part, ultrasonic testing, surface matching, automatic localization

摘要：

为提高复杂型面工件超声自动检测的效率和通用性,研究了CAD模型已知时工件的匹配定位方法。首先使用人工缺陷贴片的超声C扫描数据获取待匹配特征点的位姿。然后以工件3个角点为特征点进行初始定位,由2个局部坐标系匹配得到初始匹配矩阵。最后根据点到曲面的最小距离原则进行精匹配定位,使用循环迭代及Menq算法进行寻优求解。实例表明,选用6个采样点时,匹配误差可控制在04mm以内,能很好地满足复杂型面工件超声自动检测的精度要求。

关键词:

复杂型面工件, 超声检测, 曲面匹配, 自动定位

CLC Number:

TP391.7

HU Hong-Wei-1, LI Xiong-Bing-2, NI Pei-Jun-3, WANG Xiang-Gong-1.

Matching and Localization Method in Automatic Ultrasonic Testing for Complex Surface

Parts

[J]. China Mechanical Engineering, 2012, 23(2): 195-199.

胡宏伟1, 李雄兵2, 倪培君3, 王向红1.

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.

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Matching and Localization Method in Automatic Ultrasonic Testing for Complex Surface

Parts

复杂型面工件超声自动检测中的匹配定位方法

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