| Project/Area Number |
22KJ0822
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| Project/Area Number (Other) |
22J11769 (2022)
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| Research Category |
Grant-in-Aid for JSPS Fellows
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| Allocation Type | Multi-year Fund (2023)
Single-year Grants (2022) |
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| Section | 国内 |
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| Review Section |
Basic Section 20010:Mechanics and mechatronics-related
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| Research Institution | The University of Tokyo |
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Principal Investigator |
王 方一 東京大学, 工学系研究科, 特別研究員(DC2)
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| Project Period (FY) |
2023-03-08 – 2024-03-31
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| Project Status |
Completed (Fiscal Year 2023)
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| Budget Amount *help |
¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 2023: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2022: ¥900,000 (Direct Cost: ¥900,000)
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| Keywords | Piezoelectric transducer / Resonance / Vibration control / 圧電 / 共振周波数 |
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| Outline of Research at the Start |
Based on the resonant frequency ratio control method, dual-frequency ultrasound will be excited.
Numerical analysis will be conducted to obtain the acoustic characteristics of dual-frequency ultrasound, including sound pressure and acoustic radiation force distribution.
New applications with dual-frequency ultrasound will be explored in areas such as acoustic levitation and ultrasonic cavitation.
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| Outline of Annual Research Achievements |
This study introduces a dynamic resonance frequency control method based on passive devices to address the issue of resonance frequency drift in high-power piezoelectric transducers, including: 1.Investigation of the dynamic resonance frequency control method for multimodal piezoelectric transducers under high driving voltages. 2.Static frequency matching and dynamic frequency control in multimodal piezoelectric actuators were achieved, significantly improving the actuators' long-term stability. 3.Stable dual-frequency ultrasound output was realized. The enhancement effect of dual-frequency ultrasound on near field acoustic levitation was explored and verified for the first time. Further development is expected to significantly enhance the performance of multimodal ultrasonic transducers.
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