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Comparative study of E-shaped coil and evolution of new methodology for crack detection using eddy current testing

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Eddy current testing (ECT) is widely used in the non-destructive evaluation and detection of cracks in different industries. The most important feature in eddy current testing is the way in which the eddy currents are induced and detected in the sample. Thus, sensing coil development plays a very important role in eddy current testing. The authors have designed a number of sensors by varying certain parameters in the sensor. These parameters are the shape and size of the coil and the number of windings. Initially, an 8-shaped coil was designed with embedded configuration. Other coils designed were of an E-shape. They were of transmit and receive type. These coils were tested for different sizes and numbers of windings. The responses of these sensors to different cracks have been studied under varying operating conditions (frequency and voltage). This paper provides a comparative study of these sensors under different operating conditions and monitors their response to cracks of different dimensions.
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Document Type: Research Article

Publication date: October 1, 2013

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