This month's Insight

April 2020 – Vol 62 No 4 



Comment, by Professor I Cooper

NEWS DESKOvercoming the limitations of conventional ultrasound sensors 
in NDT with proprietary and novel thin-film technology; Integrated sensors 
secure and monitor manufacturing of thick-walled CFRP structures


SPECIAL FEATURE: Ultrasonics


Correction of B-scan distortion for optimum ultrasonic imaging of backwalls 
with complex geometries,
by S Davì, C Mineo, C MacLeod, S G Pierce, A Gachagan, S Paton, G Munro, 
J O’Brien-O’Reilly and C McCubbin


Ultrasonic velocity tomography for inspecting the condition of a bridge pylon,
by Sheng-Hsiung Hsieh, Helsin Wang, Chih-Hsin Hu and Chung-Yue Wang


Ultrasonic algorithms for calculating probe separation distance, combined 
with full matrix capture with the total focusing method,
by C Hoyle, M Sutcliffe, P Charlton, S Mosey and M Weston


Time-domain topological energy imaging with ultrasonic Lamb waves 
considering multiple defects,
by Wenfa Zhu, Yujie Zhang, Guopeng Fan, Haiyan Zhang and Shao Wei


Detection of near-surface defects in rails combining Green’s function retrieval 
of ultrasonic diffuse fields and sign coherence factor imaging,
by Haiyan Zhang, Mintao Shao, Guopeng Fan, Hui Zhang and Wenfa Zhu


FEATURES:

Influence of electrical and thermal ageing on the mineral insulating oil 
performance for power transformer applications,

by C Ranga, A Kumar and R Chandel

A new gearbox compound fault recognition approach based on improved 
double wavelet packet transform,
by Xiaoni Dong, Dongqin Fan, Guangrui Wen, Xiaodong Zhang and Zhifen Zhang



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