| Presentation | 2024-02-27 Improvement of time reversal acoustic focusing applied with modulated signal Ayumu Takahashi, Hideyuki Nomura, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Time reversal focusing uses multiple transducers in non-destructive testing. Although focusing efficiency decreases, a single element transducer realizes time reversal focusing for a closed environment. This study aims to improve the efficiency of time reversal focusing on a single element using the modulated signal. The focusing performance of a chirp signal of 4-77 kHz exciting an aluminum plate with thickness of 5 mm and size of 150 mm x 150 mm was experimentally evaluated. The experimental results show an amplitude five times greater than that of the sinusoidal drive in the time domain. This result suggests applying the modulated signal is useful for non-destructive testing using time reversal focusing. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Time reversal acoustic waves / Non-destructive inspection / Modulation signal / Chirp signal |
| Paper # | US2023-79 |
| Date of Issue | 2024-02-20 (US) |
| Conference Information | |
| Committee | US |
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| Conference Date | 2024/2/27(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Tokyo Metropolitan Industrial Technology Research Institute (TIRI) |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Acoustic imaging, NDT, Ultrasound in medicine, Ultrasonics, etc. |
| Chair | Yasuaki Watanabe(Tokyo Metropolitan Univ.) |
| Vice Chair | Kentaro Nakamura(Tokyo Inst. of Tech.) / Subaru Kudo(Ishinomaki Senshu Univ.) |
| Secretary | Kentaro Nakamura(Tohoku Univ.) / Subaru Kudo(Tokyo Metropolitan Univ.) |
| Assistant | Ayumu Osumi(Nihon Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Ultrasonics |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Improvement of time reversal acoustic focusing applied with modulated signal |
| Sub Title (in English) | |
| Keyword(1) | Time reversal acoustic waves |
| Keyword(2) | Non-destructive inspection |
| Keyword(3) | Modulation signal |
| Keyword(4) | Chirp signal |
| 1st Author's Name | Ayumu Takahashi |
| 1st Author's Affiliation | The University of Electro-Communications(UEC) |
| 2nd Author's Name | Hideyuki Nomura |
| 2nd Author's Affiliation | The University of Electro-Communications(UEC) |
| Date | 2024-02-27 |
| Paper # | US2023-79 |
| Volume (vol) | vol.123 |
| Number (no) | US-388 |
| Page | pp.pp.29-31(US), |
| #Pages | 3 |
| Date of Issue | 2024-02-20 (US) |