An automated multiviewing ultrasonic technique for flaw reconstruction
This paper describes key achievements in the development of an automated multiviewing ultrasonic instrumentation for flaw characterization in materials. Based on ultrasonic signals scattered from the flaw in a number of directions, the signal processing algorithms provide a reconstruction of the size, shape, and orientation of the flaw. To improve the reconstruction reliability for arbitrarily oriented flaws, an angular scan plan is developed to select the most favorable data acquisition aperture configuration for a given flaw. Reconstruction results are presented. Electronic circuits are developed for the generation and detection of broadband unipolar ultrasonic pulses in order to characterize flaws over a wider size range. A second generation multiview transducer has been developed to incorporate these capabilities. The instrumentation and the associated signal processing algorithms form a unique research and inspection tool. 17 refs., 6 figs., 1 tab.
- Research Organization:
- Ames Lab., IA (USA)
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 6611292
- Report Number(s):
- IS-M-607; CONF-870679-5; ON: DE89003733
- Country of Publication:
- United States
- Language:
- English
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