2021 Fiscal Year Final Research Report
High-speed and three-dimensional measurement of ultrasonic wave propagation with nanometer-order precision
| Project/Area Number |
20K21001
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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) |
2020-07-30 – 2022-03-31
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| Keywords | 計測工学 / 超精密計測 / 画像計測 / 応用光学・量子光工学 / 3次元画像 / ホログラフィー / 位相計測 |
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| Outline of Final Research Achievements |
Aiming to create a technology that can measure three-dimensional (3-D) image of ultrasonic wave propagation on the nanometer order, we established a measurement method based on holography, a 3-D imaging technology. Also, we designed and constructed a demonstration system for this method. Using the constructed system, we experimentally demonstrated the capability of simultaneously measurement of the propagation of ultrasonic waves and the 3-D distribution of ultra sound sources.
The motion picture recording of the ultrasonic propagation with the different frequencies emitted from multiple ultrasonic sources and the capability of measuring each frequency were also experimentally demonstrated. Furthermore, the propagation of ultrasonic waves emitted from multiple ultrasonic sources was recorded in a single moving picture, and the propagation of each ultrasonic wave was successfully identified and visualized.
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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 |
これまでの超音波イメージングでは，超音波センサアレイを用いたり，光干渉計を用いるものであった．前者は，空間分解能が低い，またセンサアレイの存在自体が被検超音波に影響を与えるという問題があった．後者は，超音波の伝搬に対して空間分解能がナノメートルオーダのイメージングはできるが，音源の3次元分布を特定できなかた．本研究で創生した計測方法では，超音波の伝搬をナノメートルオーダかつ音源の3次元分布も特定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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