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Multi-view Ultrasonic Array Imaging and Use It for Defect Characterisation

点击[] 时间[ 2016年09月05日 11:48] 发布人[王凌沛]

报告时间:2016914下午15:00

报告地点:新主楼A412

报告人:张杰

报告题目:Multi-view Ultrasonic Array Imaging and Use It for Defect Characterisation

报告摘要:

In the post-processing ultrasonic array full matrix capture (FMC) data from an immersion inspection to image a region of interest (ROI), the total focusing method (TFM) can be used to generate multiple image views for the same region through exploiting reflections off geometric features, mode conversions at interfaces and using different paths for transmitted and received waves. They are termed as the multi-view TFM (MTFM) images. In this talk, the feasibility of using MTFM images to distinguish between small volumetric and crack-like defects is investigated through the analysis of the images from various simulated and experimentally-measured FMC array data sets. It is found that the presence of a defect of a particular type will typically be observable in some or all of the views with different image amplitudes. Different types of defect have different imaging modes which give large image amplitude and this can be used to classify the defect type.

报告人简介:

Jie Zhang received BS and M.S. and Ph.D. degrees from Harbin Institute of Technology in 1999 and 2002, and now he works as a Research Associate and a Teaching Associate in Department of Mechanical Engineering, University of Bristol. His research interests are in Sub-wavelength volumetric defect detection and characterisation using ultrasonic arrays, and Embedded optical and ultrasonic sensors for monitoring and diagnosing the ‘health’ of structures. He is the recipient of Orbital Transport and Spinning of Matter in Acoustic Vortices in 2014-2015 and EPSRC Research Center in Nondestructive Evaluation (RCNDE) Major Knowledge Transfer Grant in 2013-2014.He has been awarded EPSRC Knowledge Transfer Secondment with Serco Technical Services in 2012.He has published more than fifty significant papers in the professional fields.

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