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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Savoia, A.S. Mauti, B. Caliano, G. Lamberti, N. |
| Copyright Year | 2014 |
| Description | Author affiliation: Dipt. di Ing., Univ. degli Studi Roma Tre, Rome, Italy (Savoia, A.S.; Mauti, B.; Caliano, G.) || Dipt. di Ing. Ind., Univ. degli Studi di Salerno, Salerno, Italy (Lamberti, N.) |
| Abstract | Ultrasonic transducers for broadband water-coupled operation in the low ultrasonic 30-100 kHz frequency range find their application in different industrial and biomedical areas, such as non-destructive testing and therapy. In this paper we propose the design and the fabrication process of a multi-cell, piezoelectrically-actuated, flexural-mode transducer structure, characterized by a low mechanical impedance leading to wideband and high sensitivity immersion operation and by a high flexibility in the definition of the active area shape. After investigating the use of different materials for the different components, we report on the design of a fabrication process flow for the precise assembly of the transducer, based respectively on epoxy resin and wire-bonding for mechanical and electrical interconnection of the individual parts. A reduced-thickness (<;10 mm) and weight (350 g) transducer prototype, featuring 121 circular cells placed in a hexagonal tiling arrangement covering a quasi-circular area of 80-mm diameter, is designed, fabricated, and characterized. A transmit sensitivity of 5 kPa/V at 100 kHz resulted from hydrophone measurements performed at 150 mm while the pulse-echo response from a planar surface placed at the same distance showed a 125% -6dB fractional bandwidth centered at 53 kHz. |
| Starting Page | 2591 |
| Ending Page | 2594 |
| File Size | 1633107 |
| Page Count | 4 |
| File Format | |
| e-ISBN | 9781479970490 |
| DOI | 10.1109/ULTSYM.2014.0647 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2014-09-03 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Transducers Acoustics Rails Fabrication Broadband communication Sensitivity Materials piezoelectric unimorph Broadband ultrasonic transducer flexural-mode transducer acoustic projector |
| Content Type | Text |
| Resource Type | Article |
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