| Budget Amount *help |
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2023: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2022: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2021: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2020: ¥7,150,000 (Direct Cost: ¥5,500,000、Indirect Cost: ¥1,650,000)
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| Outline of Final Research Achievements |
In order to realize powerful ultrasound devices in various research fields, we proposed a ultrasound focusing transducer DPLUS, which utilizes a double-reflecting surface structure to focus longitudinal waves and emit from the tip of a thin rod waveguide. In this study, we clarified and improved the output limitations of DPLUS. The results showed that DPLUS could also be applied to acoustic tweezers and thermal ablation devices. Furthermore, wave propagation analysis of DPLUS burst excitation revealed that longitudinal/transverse mode conversion occurs with high efficiency at the first reflecting surface. Based on this finding, an elliptical reflection focusing mechanism ELIPS was proposed.
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