Study on ultrasonic detecting technology of profiled component

  • Authors:

  • Yanhua Zhang;Lu Yang;Haijun Cao

  • Affiliations:

  • National Key Laboratory for Electronic Measurement Technology, North University of China, Taiyuan, Shanxi province, China;National Key Laboratory for Electronic Measurement Technology, North University of China, Taiyuan, Shanxi province, China;National Key Laboratory for Electronic Measurement Technology, North University of China, Taiyuan, Shanxi province, China

  • Venue:
  • WSEAS Transactions on Circuits and Systems
  • Year:
  • 2010

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Abstract

The profiled component has some structural features, such as thin wall, small diameter and corner angle on inner wall. The features make it very difficult to detect the profiled component with non-destructive examination method. According to the principle of ultrasonic creeping wave, a grouped ultrasonic detecting method is put forward to detect the standard defects in inner and outer of profiled component. Based on comparing defect echo with inner edge wave, feature extraction method of two characteristics of amplitude and time is put forward to extract defects and to eliminate the interference of inner edge wave. In order to overcome the one-sidedness disadvantage of single probe data, data fusion technology of synthesis local decisions of three probes is used to determine defects, which improves the accuracy of defect judgement. Three characteristic values of period, duration time and amplitude of echo signal are used to comprehensively evaluate the defect type. The testing results indicate that the detection method and signal processing method can meet the application requirements of accuracy and reliability, and it would have good application foreground for on-line detection.