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Verfahren zur berührungslosen Überprüfung von Werkstücken sowie Verfahren zur berührungslosen Anregung und Empfang von Ultraschallwellen in Werkstücken

Device for non-contact testing of workpieces and method for the non-contact excitation and reception of ultrasonic waves in workpieces
 
: Hübschen, Gerhard; Gebhardt, Wolfgang; Licht, R.; Bruche, D.

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Frontpage ()

DE 102011118596 A1: 20111115
German
Patent, Electronic Publication
Fraunhofer IZFP ()

Abstract
The device has an electromagnetic ultrasonic transducer (1a) and an airborne sound transducer (2a) that are provided on either side of a workpiece (3). A permanent magnet (10) is arranged in parallel to the electromagnetic ultrasonic transducer for creation of alternating electromagnetic field in the workpiece. The alternating electromagnetic field induced in the workpiece is detected using a high frequency coil (13). An independent claim is included for a method for contactless excitation and reception of ultrasounds in workpieces.

: http://publica.fraunhofer.de/documents/N-270861.html