|
|
|
| Research on Automatic Ultrasonic Waveform Tracking for Curved Surface Composite Parts with Variable Thickness |
| ZHENG Hui-feng1,LV Jiang-Ming1,YANG Ni,YANG Chen-long2 |
1. China Jiliang University, Hangzhou, Zhejiang 310018, China
2. Shanghai Institute of Measurement and Testing Technology, Shanghai 201203, China
3. Zhejiang University, Hangzhou, Zhejiang 310027, China |
|
|
|
|
Abstract The principles of ultrasonic test and automatic wave tracking were analyzed and the improved BP neural network was proposed to acquire the mapping function between the plus of sensitivity and sampling points position information,which was made into template,in order to realize compensation and real-time control of the plus of sensitivity and automatic tracking of the bottom wave during the ultrasonic test for the curved surface composite parts with variable thickness. The simulated results and experiments have shown that the proposed method overcome the difficulty of multi-peeks successfully in automatic ultrasonic test for curved surface composite parts with variable thickness. It is in common significance to improve the efficiency and accuracy of ultrasonic test for similar complex curved surface parts with high attenuation rate.
|
|
|
|
|
|
|
|
［1］刘怀喜,张恒,马润香.复合材料无损检测方法［J］. 无损检测, 2003, 12(25):631.
［2］江健,吴瑞明,杜兴吉. 曲面构件超声检测中的灵敏度自动补偿技术［J］． 机床与液压, 2004, (9):167～169.
［3］竺科仪,徐志农,祝建礼. 变厚度曲面复合构件超声检测中的自动波形跟踪技术［J］. 机床与液压, 2007, (1):178～179.
［4］吴思源,周晓军,江健,等. 超声检测中曲面重构和路径规划方法研究［J］. 浙江大学学报, 2006, 40(5):763~767.
［5］杜兴吉. 面向超声检测的复杂曲面反求技术及路径规划研究［D］ .杭州:浙江大学, 2005.
［6］陈继芳． 航空锻件超声自动检测系统若干关键问题研究［D］． 杭州:浙江大学, 2004. |
|
|
|
2012, Vol. 33 
