CENTERING METHOD OF EDDY CURRENT TESTING COIL

CENTERING METHOD OF EDDY CURRENT TESTING COIL

PURPOSE:To enable centering of a eddy current testing coil to be performed rapidly by a simple device. CONSTITUTION:A plurality of reference defects 11 are shifted in a direction of a pipe axis and placed in a direction of the pipe periphery at a specific pitch. When a test piece 10 is inserted into...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: ITOU KATSUHITO, IDA KOICHI
Format: Patent
Sprache:eng
Schlagworte:
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
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Beschreibung
Zusammenfassung:PURPOSE:To enable centering of a eddy current testing coil to be performed rapidly by a simple device. CONSTITUTION:A plurality of reference defects 11 are shifted in a direction of a pipe axis and placed in a direction of the pipe periphery at a specific pitch. When a test piece 10 is inserted into a coil 20, a plurality of detection signals corresponding to each reference defect 11 are obtained in order without overlapping one other. A center position of the test piece 10 is obtained from a plurality of detection signals which were obtained by one passage of a piece and the coil 20 is allowed to move so that the center position matches a center position of the test coil 20.