Eddy current probe with recesses to hold coils and allow the coils to rock and move perpendicular to the longitudinal axis of the probe

摘要

A device for eddy current testing of tubes of a heat exchanger having a U-shape tube bundle includes a test sensor having an insertion tip and a longitudinal axis. Elastic hose pieces are connected to the insertion tip. At least three coils are disposed along the elastic hose pieces. A pusher hose is connected to the elastic hose pieces. A pusher device is connected to the pusher hose for inserting the pusher hose into a tube of a tube bundle. The coils have contact surfaces each extending over only a portion of the inner periphery of the tube of the tube bundle. The coils are staggered about the circumference of the test sensor and are staggered along the longitudinal axis of the test sensor. A location recognition unit is disposed in the test sensor.