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231223s1999 xx |||||o 00| ||eng c |
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|a 10.1109/58.753019
|2 doi
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|a pubmed25n0591.xml
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|a eng
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|a Kirk, K J
|e verfasserin
|4 aut
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|a Ultrasonic arrays for monitoring cracks in an industrial plant at high temperatures
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|c 1999
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 16.12.2009
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|a Date Revised 01.02.2008
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|a published: Print
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|a Citation Status PubMed-not-MEDLINE
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|a A piezoelectric linear array structure has been designed to operate at temperatures up to 400 degrees C for nondestructive testing of steel components of a hot industrial plant. It is intended that these arrays be fixed permanently to the test subject so that known defects can be monitored by comparing measurements taken over a period of time without needing to shut down the plant. The arrays are used in pairs: the transmitter is a phased array producing a variable angle steered beam, and a second array is used for receiving. The defect can be identified from a series of scans collected from individual elements of the second array. A simple monolithic array structure was used, based on a single crystal of lithium niobate and operating in the frequency range 3 to 5 MHz. Prototype devices have 64 elements on a 0.5 mm pitch. Simulated defects in steel blocks have been scanned at high temperatures to illustrate the arrays' capability for nondestructive testing. The results suggest an accuracy better than 1 mm in finding the location of crack tips
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|a Journal Article
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|a McNab, A
|e verfasserin
|4 aut
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1 |
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|a Cochram, A
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Hall, I
|e verfasserin
|4 aut
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| 700 |
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|a Hayward, G
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t IEEE transactions on ultrasonics, ferroelectrics, and frequency control
|d 1986
|g 46(1999), 2 vom: 28., Seite 311-9
|w (DE-627)NLM098181017
|x 1525-8955
|7 nnas
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| 773 |
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|g volume:46
|g year:1999
|g number:2
|g day:28
|g pages:311-9
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|u http://dx.doi.org/10.1109/58.753019
|3 Volltext
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