Maximum entropy methods in ultrasonic NDE
Journal Article
·
· AIP Conference Proceedings
- Materials Division, Australian Nuclear Science and Technology Organisation, Lucas Heights, NSW 2234 (Australia)
- CSIRO, Division of Telecommunications and Industrial Physics, Marsfield, NSW 2122 (Australia)
This paper explores the application of the maximum entropy method (MaxEnt) to reconstructing images from sparsely sampled ultrasonic field data, with particular emphasis on three-dimensional applications in non-destructive evaluation (NDE). MaxEnt has not previously been applied to this class of problem, and yet in comparison with conventional approaches to image reconstruction, such as matched filtering, it displays superior robustness against side-lobe formation and improved lateral and range resolution. The paper concludes with a description of the application of MaxEnt image reconstruction to a novel polyvinylidene fluoride (PVDF) array transducer that offers advantages over conventional point-sampled arrays in terms of simplified construction and improved SNR. This ultra-sparse orthogonal array is believed to be the first of its kind yet demonstrated, and was made possible by MaxEnt signal processing.
- OSTI ID:
- 21207689
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 497; ISSN APCPCS; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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