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Real-time measurement of relative sensor position changes by ultrasonic signal evaluation

 
: Yastrebova, O.; Bulavinov, A.; Kröning, M.

Staatliche Materialprüfungsanstalt -MPA-, Stuttgart; Univ. Stuttgart, Institut für Werkzeugmaschinen -IFW-; National Institute for Materials Science -NIMS-:
34. MPA-Seminar und VGB-Fachtagung "Werkstoff- & Bauteilverhalten in der Energie- & Anlagentechnik" 2008. CD-ROM : In Verbindung mit dem MPA-IfW-NIMS-Workshop "Advanced in High-Temperature Materials for Future High Efficiency Power Plants" am 9. und 10. Oktober 2008 in Stuttgart
Stuttgart: Materialprüfungsanstalt Universität Stuttgart (MPA Stuttgart, Otto-Graf-Institut (FMPA)), 2008
pp.39.1-39.16
MPA-Seminar <34, 2008, Stuttgart>
Fachtagung "Werkstoff- & Bauteilverhalten in der Energie- & Anlagentechnik" <2008, Stuttgart>
Workshop "Advanced in High-Temperature Materials for Future High Efficiency Power Plants" <2008, Stuttgart>
English
Conference Paper
Fraunhofer IZFP ()
acoustic mouse

Abstract
Ultrasonic testing is considered to be one of the most commonly applied nondestructive testing techniques for flaw detection and material characterization. Traditional Nondestructive Testing (NDT) provides detection of material
discontinuities that may cause failure within the designed lifetime of a part or component. In addition, Quantitative Nondestructive Testing (QNDT) provides means to obtain required information about type, size and location of deficiencies to the integrity of the inspected structure and further use under specific, given load conditions.
The "Acoustic Mouse" technique has been developed as a tool for manual ultrasonic inspection to provide test results that can be evaluated quantitatively. The ultrasonic data are processed by real-time variation methods to extract position information from backscattered acoustic noise and geometric scatter signals in the inspection
volume. The position and positional changes of the "Acoustic Mouse" sensor (transducer) are determined by the sequential analysis of ultrasonic data (highresolution sector-scans), which are acquired and reconstructed using the Sampling Phased Array technique. The results of first experiments conducted with linear scanning and intentional lift-offs demonstrate sufficient accuracy in position measurements.

: http://publica.fraunhofer.de/documents/N-88496.html