Mannesmann Aktiengesellschaft

Krautkrämer Gmbh & Co.

Krautkramer Gmbh

Harri Haacke

Reinhard Prause

Ottokar Patzke

Bernhard Karbach

Hans-Jurgen Bathmann

Gerd Kauth

Manfried Schoenen

Karl Ries

Reinhard Pawelletz

Werner Grabendorfer

Harry Kuhn

Herbert Vogt

Karl Loch

Ultrasonic test device

An ultrasound testing device for the non-destructive testing of a workpiece wherein at least three testing heads are disposed on a testing head carrier, and the testing heads emit sound waves which converge at one or more intersections in an area of the workpiece so as to detect defects and determine the wall thickness. Operationally, the number of intersections is one less than the number of testing heads, and the separation between the sound waves is chosen so as to avoid the disturbances associated with utilization of oppositely situated testing heads. In addition, the device uses a flow medium to couple the testing heads to the surface of the workpiece.

Ultrasound testing device for the non-destructive testing of workpieces

A method and apparatus for testing the entire length of round material, such as pipes, helically moving in a longitudinal direction. Testing mechanisms are maintained along the path of the pipe and are adapted to move with the pipe to test the pipe in motion. The testing mechanisms are transported fixed distances and returned to starting positions to again move with the pipe such that each testing mechanism tests finite segments of the pipe, the testing mechanisms being so spaced as to assure that the entire pipe is tested. Such testing in motion prevents any untested areas from existing on the pipe.

Method for testing the total length of extended round material such as

This invention relates to immersion ultrasonic pulse-echo testing of tubes or bars for internal defects wherein means are provided to continuously monitor the operation of the test channel. As ultrasonic energy enters the workpiece, the round workpiece surface causes acoustic energy scatter responsive echo signals which are sensed by the transmitter probe, are amplified and applied to a threshold circuit. If the amplitude of the scatter responsive signal falls below a predetermined level, an output signal indicative of 'loss of operation' is produced. Means are provided to inhibit such output signal in the event of only a momentary decrease of the scatter responsive signal below a predetermined value.

Method and apparatus for monitoring the operation of ultrasonic testing

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Ratingen-Vokarday, Germany

Harri Haacke