Investigations on Ultrasonic Transducer Array Systems for NDE of Underwater Pipelines

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Investigations on Ultrasonic Transducer Array Systems for NDE of Underwater Pipelines

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dc.contributor.author Sumangala,R
dc.contributor.author Saseendran Pillai,P R
dc.date.accessioned 2008-11-05T12:54:57Z
dc.date.available 2008-11-05T12:54:57Z
dc.date.issued 1996-12
dc.identifier.citation Department of Electronics en_US
dc.identifier.uri http://dyuthi.cusat.ac.in/purl/979
dc.description.abstract The main objective of carrying out this investigation is to develop suitable transducer array systems so that underwater pipeline inspection could be carried out in a much better way, a focused beam and electronic steering can reduce inspection time as well. Better results are obtained by optimizing the array parameters. The spacing between the elements is assumed to be half the wavelength so that the interelement interaction is minimum. For NDT applications these arrays are operated at MHz range. The wavelengths become very small in these frequency ranges. Then the size of the array elements becomes very small, requiring hybrid construction techniques for their fabrication. Transducer elements have been fabricated using PVDF as the active, mild steel as the backing and conducting silver preparation as the bonding materials. The transducer is operated in the (3,3) mode. The construction of a high frequency array is comparatively complicated. The interelement spacing between the transducer elements becomes considerably small when high frequencies are considered. It becomes very difficult to construct the transducer manually. The electrode connections to the elements can produce significant loading effect. The array has to be fabricated using hybrid construction techniques. The active materials has to be deposited on a proper substrate and etching techniques are required to fabricate the array. The annular ring, annular cylindrical or other similar structural forms of arrays may also find applications in the near future in treatments were curved contours of the human body are affected. en_US
dc.language.iso en en_US
dc.publisher Cochin University OF Science and Technology en_US
dc.subject Transducer array systems en_US
dc.subject Annular cylindrical en_US
dc.subject Underwater pipeline inspection en_US
dc.subject Annular ring en_US
dc.title Investigations on Ultrasonic Transducer Array Systems for NDE of Underwater Pipelines en_US
dc.type Thesis en_US


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