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Design and fabrication of a 5 MHz ultrasonic phased array probe with curved transducer

 
: Fischer, J.; Herzog, T.; Walter, S.; Heuer, H.

:

Schmid, U. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Smart sensors, actuators and MEMS VI. Vol.2 : 24 - 26 April 2013, Grenoble, France
Bellingham, WA: SPIE, 2013 (Proceedings of SPIE 8763)
ISBN: 978-0-8194-9560-0
Paper 87632M
Conference "Smart Sensors, Actuators and MEMS" <6, 2013, Grenoble>
Englisch
Konferenzbeitrag
Fraunhofer IZFP, Institutsteil Dresden ( IKTS-MD) ()

Abstract
A 5 MHz, 16-element phased array concave ultrasonic probe for non-destructive testing has been designed, fabricated and tested. To improve the probes performance its curvature, as opposed to present solutions, was not obtained by adding a corresponding delay wedge, but rather by manufacturing the functional elements (i.e. active material, matching layer) with a curvature. The piezoelectric material used here was a 1-3 composite material made of PZT. The finished probe was tested on a steel half circle with the corresponding radius (100 mm) and on the Olympus PAUT test piece. Good results could be obtained. Three transverse holes with a diameter of 1 mm and a distance of 5 mm to one another could be detected and resolved.

: http://publica.fraunhofer.de/dokumente/N-264440.html