| Presentation | 2017-08-31 Fundamental Study on the Effect of Acoustic Matching Layer on Convex Acoustic Lens for Equipping in Small AUV's Bow Hiroyuki Kawahara, Hanako Ogasawara, Kazuyoshi Mori, |
|---|---|
| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Recently, we designed a convex underwater acoustic lens for equipping in small AUV’s bow, and calculated its converged sound field by the finite difference time domain method (FDTD method). In the previous study, it was possible to improve converged sound pressure by correcting aberration and combining spherical and aspheric surfaces. In this study, we inserted acoustic matching layer of various thickness between the two medium for the 2 layers’ lens constructed with syntactic foam and fluorinert, and investigated the optimum thickness of the acoustic matching layer from the converged sound field calculated by FDTD method. The results showed that the converged sound pressure at the focal point was maximized at the thickness of 1/4 wavelength. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | AUV / Underwater Imaging Sonar / Acoustic Lens / Acoustic Matching Layer |
| Paper # | US2017-49 |
| Date of Issue | 2017-08-24 (US) |
| Conference Information | |
| Committee | US |
|---|---|
| Conference Date | 2017/8/31(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Minoru Kurosawa(Tokyo Inst. of Tech.) |
| Vice Chair | Nobuyuki Endoh(Kanagawa Univ.) / Shinichi Takeuchi(Toin Univ. of Yokohama) |
| Secretary | Nobuyuki Endoh(Univ. of Toyama) / Shinichi Takeuchi(Univ. of Tokyo) |
| Assistant | Takenobu Tsuchiya(Kanagawa Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Ultrasonics |
|---|---|
| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Fundamental Study on the Effect of Acoustic Matching Layer on Convex Acoustic Lens for Equipping in Small AUV's Bow |
| Sub Title (in English) | |
| Keyword(1) | AUV |
| Keyword(2) | Underwater Imaging Sonar |
| Keyword(3) | Acoustic Lens |
| Keyword(4) | Acoustic Matching Layer |
| 1st Author's Name | Hiroyuki Kawahara |
| 1st Author's Affiliation | National Defense Academy(NDA) |
| 2nd Author's Name | Hanako Ogasawara |
| 2nd Author's Affiliation | National Defense Academy(NDA) |
| 3rd Author's Name | Kazuyoshi Mori |
| 3rd Author's Affiliation | National Defense Academy(NDA) |
| Date | 2017-08-31 |
| Paper # | US2017-49 |
| Volume (vol) | vol.117 |
| Number (no) | US-190 |
| Page | pp.pp.15-18(US), |
| #Pages | 4 |
| Date of Issue | 2017-08-24 (US) |