Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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Development of New Low Frequency ECT Sensor to Detect Inner Defects(I) - Characteristic of Loss of Induced Electromotive Force -

내부결함 검출 가능한 저주파 ECT 센서개발(I) - 전자기 유도기전력 손실량의 특성-

  • Received : 2015.08.17
  • Accepted : 2015.08.22
  • Published : 2015.08.31
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Abstract

Non-destructive techniques are used widely in the metal industry in order to control the quality of materials. Eddy current testing(ECT) is one of the most extensively used non-destructive techniques for inspecting electrically conductive materials at very high speeds that does not require any contact between the test piece and the sensor. The New ECT sensor which can detect inner defects was developed regardless the condition of surface. This sensor is verified to do experiment which measure the loss of induced electromotive force. The loss of induced electromotive force was measured in 5.4% and this low frequency ECT device can detect internal defects at depth 20 mm.

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References

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