Investigating post-processing of phased array data for detection and sizing capabilities using incoherent compounding
Compounding, a technique previously used for biomedical applications, has the potential to be applied as a novel technique in NDT. Incoherent compounding is a signal processing technique that involves recombination of echoes from different propagation paths. Incoherent compounding only considers the amplitude information from received signals. Therefore, the interpretation of received signals is simplified. A favourable application of this technique is crack sizing. Coherent processing, in which the amplitude and phase of received signals are considered, would be beneficial when enhanced resolution is necessary. Both techniques would be applicable to multi-layered structures commonly found within the aerospace industry.
Experimentally, using a B-scan, incoherent compounding can be demonstrated by mirroring the direct image onto the reflected image(2). This paper will discuss incoherent compounding using a linear phased array probe with FRD capture as an innovative post-processing method. Furthermore, the results confirm the sizing and location of a combination of side-drilled holes that mimic defects.
Document Type: Research Article
Affiliations: 1: Microscale Sensors, School of Engineering and Science, University of Paisley, Paisley PA1 2BE, United Kingdom. 2: Diagnostic Sonar Ltd, Kirkton Campus, Livingston, EH54 7BX, Scotland, United Kingdom.
Publication date: April 1, 2006
- Official Journal of The British Institute of Non-Destructive Testing - includes original research and devlopment papers, technical and scientific reviews and case studies in the fields of NDT and CM.
- Information for Authors
- Submit a Paper
- Subscribe to this Title
- Information for Advertisers
- Terms & Conditions
- Ingenta Connect is not responsible for the content or availability of external websites