The invention relates to the inspection of elongated members and particularly to the non-destructive testing of rails of the type employed to form railroad tracks. More specifically, the invention is directed to ultrasonic rail-flaw inspection equipment suitable for continuous field testing of rails. A laterally movable ultrasound transducer, comprising the sensor of a rail fault detection device, is automatically centered on the rail as the detection device moves along the rail. The sensor includes a pair of ultrasound receiving transducers positioned to either side of a transducer which generates and receives ultrasonic energy. Signals provided by the receiving transducers are compared and any difference therebetween employed to control the lateral position of the sensor with respect to the rail.
Rail Flaw Detector Position Control
1979
17 pages
Report
No indication
English