Betriebsforschungsinstitut Vdeh Institut Fur Angewandte Forschung Gmbh

Bfi Betriebstechnik Gmbh

Betriebsforschungsinstitut Vdeh Institut for Angewandete Forschung Gmbh

Muecke, Gert

Boehlke, Sven

Luhn, Ernst

Ernst Luhn

Dietmar Oberhoff

Gerhard Lorenz

Roland Keck

Gunther Coen

G&uuml;nther Coen

Lothar Zell

Fritz Isselstein

Gert Muecke

Sven Boehlke

The invention relates to a transmitting system for the generation of ultrasonic waves for testing materials, comprising a controllable signal generator and an ultrasonic transducer, wherein the signal generator and the ultrasonic transducer are arranged in the immediate vicinity of one another, in order to provide a transmitting system for ultrasonic testing which has higher effectiveness and lower manufacturing costs than known transmitting systems.

System for transmitting ultrasonic waves

Apparatus for the bidirectional transfer of information comprises in each case: at least one rotating component (1); a further component (2); receivers (4, 5) on the respective components (1, 2), said receivers facing one another in groups on the axis of rotation (6) of the rotating component (1); and transmitters (7, 8) fitted on the components (1, 2) eccentrically with regard to the axis of rotation and directed towards the corresponding receivers (4, 5).

Apparatus for the bidirectional transfer of information

There is disclosed an electromagnetic transducer for the transmission and ception of ultrasonic waves in the touchless testing of metal workpieces, particularly made of steel, in the shape of sheet and strip material. The transducer is arranged for continuous testing, particularly as applied to continuously advancing material, by wavelength spectroscopy and particularly modal spectroscopy of received ultrasonic waves. To this end, the transducer comprises a pair of transducer segments each of which has a set of mutually parallel conductor tracks formed on a substantially planar printed circuit board in which the frequencies and wavelengths for each segment can be preset in a matrix logic circuit having a short time sequence. The conductor tracks comprise windings arranged to be connected for operation through a set of switching elements in such a manner as to produce in various switching states of the switching elements a plurality of wavelengths for each frequency. The wavelengths being proportionally related to each other by small integral numbers.

Electromagnet transducer

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Haan, Germany

Ernst Luhn