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Novel E-style sensor based on surge eddy current for rough surface crack inspection

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This paper introduces a high-sensitivity eddy current method featuring new E-style sensor design and input signal shape. Current improvement of traditional eddy current testing is focused on the sensor design, signal model and signal processing. A new type of eddy current sensor is developed for coarse surface crack testing. In addition, the input signal is not AC or traditional rectangular pulsed wave, but a transformative signal named pulsed surge eddy current. These new design features and signals have the advantage, that the surge eddy current could transform low input energy into a much higher voltage instantly, which is beneficial for testing sensitivity. Also, the pick-up uses the phase change to detect cracking, and it is easier to process.
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Document Type: Research Article

Affiliations: 1: Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China. 2: School of Aerospace, Room 803, Main Building, Tsinghua University, Beijing 100084, China.

Publication date: July 1, 2006

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