Automatic Image Measurement Technology in Endoscopy NDT
Endoscopy is an important non-destructive testing (NDT) method. It plays an important role in damage assessment and fault detection for aeroengine and structure 1,3. However, the endoscopy usually relies on the operators experience to measure the defects manually in the application. Therefore, the current endoscopy method has some shortcomings that the accuracy and the efficiency of its measurement are low. To solve these problems, an automatic image measurement method based on the cubic spline interpolation is proposed in this paper. Firstly, the endoscopy image pre-processing such as gray processing, filtering, sharpening, segmentation and edge extraction are presented. Then, the pixel points in the processed edge image are handled by cubic spline interpolation and the spline function is got. After the starting point, vertex and endpoint of the defect are determined automatically, the width, depth and distance of defects are worked out. Finally, the method is applied in the fault detection for aeroengines blade. The experimental results show that this method can detect the width, depth and distance of the aeroengines blade defects exactly and quickly.
aeroengine endoscopy image processing automatic measurement fault detection
Liu Guanjun Zhang Yong Qiu Jing Lu Kehong
College of Mechatronic Engineering and Automation,National University of Defense Technology,Changsha,China,410073
国际会议
The 8th International Conference on Damage Assessment of Structures(DAMAS 2009)(第八届结构损伤评价国际学术会议)
北京
英文
803-809
2009-08-03（万方平台首次上网日期，不代表论文的发表时间）