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Through-transmission imaging of solids in air using ultrasonic gas-jet waveguides
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UNSPECIFIED (2003) Through-transmission imaging of solids in air using ultrasonic gas-jet waveguides. IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL, 50 (11). pp. 1509-1515. ISSN 0885-3010.
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Abstract
An ultrasonic waveguide has been produced in air by using a gas jet. This uses the fact that a lower acoustic velocity can be produced within the jet, relative to the air surrounding it. The lower velocity is achieved by mixing carbon dioxide with air within the jet at a concentration that is a compromise between lower acoustic velocity and increasing attenuation. Using a capacitance transducer placed within the flowing gas, it is shown that improvements in the beam width can result when the gas jet is used. Air-coupled images of solid samples have been produced in through transmission, which demonstrate that an improved lateral resolution can result when a comparison is made to images from conventional air-coupled testing.
Item Type: | Journal Article | ||||
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Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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Journal or Publication Title: | IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL | ||||
Publisher: | IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC | ||||
ISSN: | 0885-3010 | ||||
Official Date: | November 2003 | ||||
Dates: |
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Volume: | 50 | ||||
Number: | 11 | ||||
Number of Pages: | 7 | ||||
Page Range: | pp. 1509-1515 | ||||
Publication Status: | Published |
Data sourced from Thomson Reuters' Web of Knowledge
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