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Publication - Dr Robert Hughes

    Developments in near electrical resonance signal enhancement (NERSE) eddy-current methods


    Hughes, R & Dixon, S, 2015, ‘Developments in near electrical resonance signal enhancement (NERSE) eddy-current methods’. in: Dale E Chimenti, Leonard J Bond (eds) 41st Annual Review of Progress in Quantitative Nondestructive Evaluation, Volume 34. American Institute of Physics (AIP), pp. 345-352


    In industry, the detection of small defects above a background noise threshold is always a limiting factor. This is true for even the most sensitivity and reliable of NDT techniques. However, defect signals in eddy-current (EC) inspections have the potential to be boosted above noise thresholds by exploiting the near electrical resonance signal enhancement (NERSE) phenomena, resulting from resonant frequency-shifting of an EC system as the coil passes over a defect. Following on from the observation and characterisation of this phenomenon, NERSE based EC methods are being investigated and developed for the detection of sub-millimeter surface defects in Aerospace superalloys. This paper discusses current advances in the development of such techniques and explores the potential of NERSE exploitation as well as examining its limitations.

    Full details in the University publications repository