An air-coupled line-focused capacitive ultrasonic transducer
UNSPECIFIED (2000) An air-coupled line-focused capacitive ultrasonic transducer. In: IEEE Ultrasonics Symposium, SAN JUAN, PR, OCT 22-25, 2000. Published in: 2000 IEEE ULTRASONICS SYMPOSIUM PROCEEDINGS, VOLS 1 AND 2 pp. 1061-1064.Full text not available from this repository.
A new type of air-coupled, line-focusing transducer is described. This capacitive broadband device, with an active area measuring 19.5mm x 45mm, consists of a metallised 3.5mm thick polymer film mounted over a brass backplate cylindrically concave along its length, with a radius of 28mm. Device bandwidth (-6dB) was found to be typically 200kHz to 900kHz, with a focal line width of similar to0.68 mm. A miniature air-coupled receiver was used to scan the radiated field of these devices, excited in both tone-burst and broadband mode, and the results compared to theoretical sound pressure plots using an impulse response method. A pair of devices has been used in a novel crossed arrangement to image the surface profile of solids.
|Item Type:||Conference Item (UNSPECIFIED)|
|Subjects:||T Technology > TA Engineering (General). Civil engineering (General)
|Series Name:||ULTRASONICS SYMPOSIUM|
|Journal or Publication Title:||2000 IEEE ULTRASONICS SYMPOSIUM PROCEEDINGS, VOLS 1 AND 2|
|Editor:||Schneider, SC and Levy, M and McAvoy, BR|
|Number of Pages:||4|
|Page Range:||pp. 1061-1064|
|Title of Event:||IEEE Ultrasonics Symposium|
|Location of Event:||SAN JUAN, PR|
|Date(s) of Event:||OCT 22-25, 2000|
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