An automated Eddy Current Testing (ECT) method to inspect non circular metallic tubular parts, usually inspected manually, is presented. The basic idea is to project (physically or virtually) the sources of a classical rotating field ECT device on a surface following the profile of the inspected tube, in order to get a “travelling field”, giving the same possibilities as rotating field for ECT of circular tubes. In this paper a “physical” projection of source currents will be used to demonstrate that the “projected” field map achieves better performance than the use of standard rotating field, in the second part it is presented the procedure to get a “virtual” sources projection in order to use an excitation system positioned on a cylindrical geometry to investigate a tube with generic cross-section. In this paper for exemplification purpose an elliptical tube is investigated.
Shaping of Source Currents for ECT of non Circular Tubes
FORMISANO, Alessandro;MARTONE, Raffaele
2010
Abstract
An automated Eddy Current Testing (ECT) method to inspect non circular metallic tubular parts, usually inspected manually, is presented. The basic idea is to project (physically or virtually) the sources of a classical rotating field ECT device on a surface following the profile of the inspected tube, in order to get a “travelling field”, giving the same possibilities as rotating field for ECT of circular tubes. In this paper a “physical” projection of source currents will be used to demonstrate that the “projected” field map achieves better performance than the use of standard rotating field, in the second part it is presented the procedure to get a “virtual” sources projection in order to use an excitation system positioned on a cylindrical geometry to investigate a tube with generic cross-section. In this paper for exemplification purpose an elliptical tube is investigated.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
