2023 Fiscal Year Final Research Report
Spectroscopic high-speed motion picture measurement of sound field with nanometer-order precision
| Project/Area Number |
22K18809
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| Research Category |
Grant-in-Aid for Challenging Research (Exploratory)
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| Allocation Type | Multi-year Fund |
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| Review Section |
Medium-sized Section 21:Electrical and electronic engineering and related fields
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| Research Institution | Kyoto Institute of Technology |
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Principal Investigator |
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| Project Period (FY) |
2022-06-30 – 2024-03-31
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| Keywords | 計測工学 / 超精密計測 / 画像計測 / 光工学・光量子科学 / 3次元画像 / ホログラフィ / 位相計測 / 高速度イメージング |
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| Outline of Final Research Achievements |
A holography-based measurement method was developed and a demonstration system was constructed to create a technology that can measure the propagation of sound waves and their component frequencies in movies on the nanometer order. Using the system, we recorded movies of sound waves emitted from multiple speakers, and succeeded in separating and reconstructing the propagation of each sound wave.
In addition, as an application of the created technique, we extracted movies of only the propagation of sound waves from movies of sound propagating through a fluctuating medium. The sound wave propagation in compressed gas emitted from a spray nozzle was recorded as a movie, and only the propagation of the sound wave was successfully identified, separated, and reconstructed from the movie.
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| Free Research Field |
光応用計測
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| Academic Significance and Societal Importance of the Research Achievements |
これまでの音波イメージングでは，音の伝搬の様子の動画像記録ができていたが，音の種類による分別はできなかった．本研究で創生した計測方法では，音波の伝搬をナノメートルオーダかつ周波数成分毎にその伝搬を動画像再構成できる新しい方法であり学術的意義が大きい．本法は，稼働中の種々の機械から発せられる超音波の計測や超音波を用いた検査装置の評価に応用できるために，安全なものづくりに貢献でき，社会的意義も大きい．
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