Sensors & Transducers Journal
(ISSN 1726- 5479)
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205.767 |
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(ISSN 1726- 5479) |
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Vol. 22, Special Issue, June 2013, pp. 133-138
Modeling and Simulation of Piezoelectric Vibration Generator for Powering Wireless Sensor Networks1 HE Qing, 1, 2 LAN Lan, 3 YAN Zhen, 4 ZHAO Xiaotong, 1 DU Dongmei1 Key Laboratory of Condition Monitoring and Control for Power Plant Equipment, Ministry of Education, School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China 2 Sinohydro Renewable Energy Co., LTD, Beijing 100048, China 3 School of Mechanical and Electric Engineering, Agricultural University of Hebei, Baoding 071001, China 4 Division of Electric Power System, China Electric Power Research Institute, Beijing 100192, China Tel.: +86-10-61772270, +86-10-61772803 E-mail: hqng@163.com
Received: 15 April 2013 /Accepted: 20 June 2013 /Published: 28 June 2013 |
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Abstract: Micro piezoelectric vibration generator with high energy density may provide infinite and continuous energy for wireless sensor network. In order to improve generating capacity under given dimension, aiming at external force and displacement incentive environment, mathematics model of piezoelectric cantilever generator generating capacity are established, and influence law of unimorph and bimorph piezoelectric generator structural parameter on output voltage are analyzed by finite element simulation. The results show that on external force incentive environment, the output voltage increase linearly while length increase and decrease inverse proportion while width increase; on displacement incentive environment, the output voltage decrease while length increase and don't change while width vary; meanwhile, relation between thickness ratio and output voltage isn't affected by incentive environment, and bimorph piezoelectric generator with low thickness ratio should be selected at first for obtaining higher output voltage.
Keywords: Wireless sensor network, Vibration energy harvesting, Piezoelectric vibration generator, Microcantilever.
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