| 研究課題/領域番号 |
22KJ0822
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| 補助金の研究課題番号 |
22J11769 (2022)
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| 研究種目 |
特別研究員奨励費
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| 配分区分 | 基金 (2023)
補助金 (2022) |
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| 応募区分 | 国内 |
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| 審査区分 |
小区分20010:機械力学およびメカトロニクス関連
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| 研究機関 | 東京大学 |
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研究代表者 |
王 方一 東京大学, 工学系研究科, 特別研究員(DC2)
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| 研究期間 (年度) |
2023-03-08 – 2024-03-31
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| 研究課題ステータス |
完了 (2023年度)
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| 配分額 *注記 |
1,700千円 (直接経費: 1,700千円)
2023年度: 800千円 (直接経費: 800千円)
2022年度: 900千円 (直接経費: 900千円)
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| キーワード | Piezoelectric transducer / Resonance / Vibration control / 圧電 / 共振周波数 |
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| 研究開始時の研究の概要 |
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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| 研究実績の概要 |
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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