DocumentCode :
2347159
Title :
3A-2 Cylindrical Ultrasonic Array for Borehole Applications
Author :
Fleury, G. ; Froelich, B. ; Guey, J.-L. ; Liang, K. ; Schoeb, P.
Author_Institution :
IMASONIC, Besancon
fYear :
2006
fDate :
2-6 Oct. 2006
Firstpage :
38
Lastpage :
41
Abstract :
A cylindrical ultrasonic array has been developed for operating environments that can reach extremes of 175 C and 20,000 psi. The array is a key component of the PharUSIT (Phased Array Ultrasonic Transducer for Inspection of Tubing), a research demonstrator developed for borehole applications. The full array consists of 800 elements (10 rings of 80 elements each) and can provide a whole range of beam-forming versatilities and capabilities in 3D, such as variable focusing, beam steering, electronic scanning, etc, all accomplished without mechanical movements. Special piezocomposites have been developed for the transduction layer, and new polymeric composites have been formulated for the backing material. The center frequency was chosen to be about 500 kHz to accommodate attenuation of the propagation media. A novel technique utilizing custom flexible circuit provides electrical connections between the array and the front-end electronics. Special fabrication processes have been developed to construct the array in a cylindrical geometry. A customized testing protocol has been implemented to demonstrate the survivability of the array technology and to evaluate the performance characteristics of individual elements under high-temperature/high-pressure conditions. Data from electroacoustic measurements such as electrical impedance, bandwidth, sensitivity, angular directivity, and inter-element cross-talks will be shown
Keywords :
ultrasonic focusing; ultrasonic transducer arrays; ultrasonics; 175 C; 500 kHz; PharUSIT; angular directivity; beam steering; borehole applications; cylindrical ultrasonic array; electrical impedance; electroacoustic measurements; electronic scanning; interelement cross-talks; phased array ultrasonic transducer for inspection of tubing; piezocomposites; polymeric composites; transduction layer; variable ultrasonic focusing; Attenuation; Beam steering; Composite materials; Flexible printed circuits; Frequency; Inspection; Phased arrays; Polymers; Ultrasonic transducer arrays; Ultrasonic transducers;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Ultrasonics Symposium, 2006. IEEE
Conference_Location :
Vancouver, BC
ISSN :
1051-0117
Print_ISBN :
1-4244-0201-8
Electronic_ISBN :
1051-0117
Type :
conf
DOI :
10.1109/ULTSYM.2006.23
Filename :
4151879
Link To Document :
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