APPARAT FOER ATT AVSOEKA YTAN AV EN BULTHAALSKNOPP PAA EN GASTURBINROTOR MED ANVAENDNING AV EN VIRVELSTROEMSSOND

摘要

An invention is disclosed which supports an eddy curent probe at a predetermined distance from a surface to be scanned. In another embodiment, the probe is scanned by rotation about an axis and along an arc of predetermined length and position.