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Report No.

Investigation of an on-line pipe wall defect monitoring sensor

Tagawa, Akihiro ; Fujiki, Kazunari; Kojima, Fumio*

In the paper it was also investigated the defect detection using the electromagnetic acoustic transducer (EMAT). However, EMAT needs a different processing of defect detection signal. Until now, it was studied a small one EMAT unit that has a non-couplant characteristic and uses additionally mechanical scanning to detect defects. In the present paper it is investigated one EMAT unit with two separate coils for transducer and receiver, that can monitor for defects without any mechanical scanning.



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