An experimental study on small airflow vibration piezoelectric generators for fuze

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (12) : 35-40.

ZOU Huajie1,2,ZHANG Bo1,CHEN Hejuan2,ZHANG Jianghua1,WANG Zeping1

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Abstract

To solve the problem of the conflict between volume and power of a small fuze physical power supply, the structure of a small airflow vibration piezoelectric generator was presented, and the experimental system was established to study the output performance of the generator. The prototype was tested, the sound pressure and the output voltage were measured, and the vibration frequency, the output power and the energy conversion efficiency were analyzed. The results show that the sound pressure follows a sinusoidal pattern, the amplitude of the pressure increases linearly with the airflow velocity within the interesting range of airflow velocity. The frequency of the pressure is up to 6 kHz and it is stable within 9%. Piezoelectric transducer works in linear segments, the amplitude of output voltage is proportional to that of the pressure, and they have the same frequency, which are consistent with the energy conversion principle of the vibrationbased piezoelectric generator. A maximum power of 85 mW could be attained when the load resistance R is 3 kΩ. The efficiency of conversion from airflow to electric power of the generator is 1.2‰. It has the advantages of simple structure, small volume, high vibration frequency and non moving component, which is worth further studies.

Key words

fuze power / airflow vibration piezoelectric generator / high vibration frequency / output performance

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ZOU Huajie1,2,ZHANG Bo1,CHEN Hejuan2,ZHANG Jianghua1,WANG Zeping1. An experimental study on small airflow vibration piezoelectric generators for fuze[J]. Journal of Vibration and Shock, 2018, 37(12): 35-40

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