Lead-Zirconate-Titanate Acoustic Energy Harvester Equipped with Sound-Collecting Helmholtz Resonator
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概要
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Acoustic energy harvesters that function in environments where sound pressure is extremely high (∼150dB), such as in engine rooms of aircraft, are expected to be capable of powering wireless health monitoring systems. This paper presents the power generation performance of a lead-zirconate-titanate (PZT) acoustic energy harvester with a vibrating PZT diaphragm. The diaphragm had a diameter of 2mm, consisting of Al (0.1µm)/PZT (1µm)/Pt (0.1µm)/Ti (0.1µm)/SiO2 (1.5µm). The harvester generated a power of 5×10-14W under a sound pressure level of 110dB at the first resonance frequency of 6.28kHz. It was found that the generated power was increased to 2.0×10-13W using a sound-collecting Helmholtz resonator cone with a height of 60mm. The cone provided a Helmholtz resonance at 5.8kHz, and the generated power increased from 9.7×10-15W to 7.3×10-13W at this frequency. The cone was also effective in increasing the bandwidth of the energy harvester.
著者
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NISHIOKA Yasushiro
Department of Precision Machinery Engineering, College of Science and Technology, Nihon University
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Nishioka Yasushiro
Department Of Physics Faculty Of Science University Of Tokyo
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Matsuda Tomohiro
Department Of Epidemiology National Institute Of Public Health
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Tomioka Shungo
Department of Precision Machinery, College of Science and Technology, Nihon University, Funabashi, Chiba 274-8501, Japan
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Kimura Shu
Department of Precision Machinery, College of Science and Technology, Nihon University, Funabashi, Chiba 274-8501, Japan
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Tsujimoto Kyohei
Department of Precision Machinery, College of Science and Technology, Nihon University, Funabashi, Chiba 274-8501, Japan
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Iizumi Satoshi
Department of Precision Machinery, College of Science and Technology, Nihon University, Funabashi, Chiba 274-8501, Japan
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Tomii Kazuki
Department of Precision Machinery, College of Science and Technology, Nihon University, Funabashi, Chiba 274-8501, Japan
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UCHIDA Yusuke
Department of Precision Machinery Engineering, College of Science and Technology, Nihon University
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HAGIWARA Saori
Department of Precision Machinery Engineering, College of Science and Technology, Nihon University
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MIYAKE Shuntaro
Department of Precision Machinery Engineering, College of Science and Technology, Nihon University
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TOMIOKA Shungo
Department of Precision Machinery Engineering, College of Science and Technology, Nihon University
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TOMII Kazuki
Department of Precision Machinery Engineering, College of Science and Technology, Nihon University
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IIZUMI Satoshi
Department of Precision Machinery Engineering, College of Science and Technology, Nihon University
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KIMURA Shu
Department of Precision Machinery Engineering, College of Science and Technology, Nihon University
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