Ultrasonic inspection techniques have a proven record of applications during manufacturing and maintenance of metallic and composite aircraft structures. A-scan, B-scan, and C-scan modalities of ultrasonic imaging are deployed as independent evaluation tools by many researchers and NDI practitioners. However, modern manufacturing and maintenance procedures require real-time three-dimensional information about the condition of multi-layered structures. This kind of information can only be provided when several ultrasonic scanning modalities are combined. In this paper, we will present an integrated dual-channel system for real-time threedimensional evaluation of large area aircraft structures. The structure to be imaged is insonified using either a piezoelectric transducer or a laser-based acoustic generator. The receiver system consists of two integrated data acquisition channels that are utilized for concurrent in-plane and in-depth real-time evaluation of structures. High resolution imaging ('horizontal') channel with an ultrasonic CCD camera presents large (1square inch) real-time planar (X-Y plane) images of the structures while another ('vertical') acquisition channel analyzes in-depth (Z-axis) ultrasonic scans presenting data in an A-scan format. Applications of the dual-channel real-time ultrasonic imaging system on metallic and composite aircraft structures will be presented.
Real-time dual-channel ultrasonic system for inspection of aircraft structures
Echtzeit-Zweikanal Ultraschallsystem zur Prüfung von Luftfahrtkomponenten
2008
8 Seiten, 10 Bilder, 3 Quellen
(nicht paginiert)
Conference paper
Storage medium
English
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