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URN etd-0208111-150415 Statistics This thesis had been viewed 3575 times. Download 7252 times. Author Hua-Wen Pan Author's Email Address No Public. Department Mechanical Engineering Year 2010 Semester 1 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 81 Title Analysis and Fabrication of Piezoelectric Vibration Energy Harvesters Keyword FEM power harvesting piezoelectric piezoelectric power harvesting FEM Abstract Electrical power can be generated by harvesting low-frequency vibration energy in ambient environment such as the vibration of a car running on rough ground. In this study, a harvesting device which consists of a piezoelectric cantilever beam with a proof mass is developed for a wireless tire pressure monitoring sysytem (TPMS). First of all, the finite element software COMSOL was utilized to calculate the resonance frequencies and output powers of piezoelectric cantilever beams with various geometries and structures. Results show that the resonance frequency could be reduced by increasing the length of piezoelectric beam and the weight of mass, and the increases of width and thickness would raise the electric power. Besides, a d31 unimorph structure has a camparable output power as well as simple configuration. According to the simulation results, a piezoelectric harvesting device for TPMS was designed and fabricated based on the d31 unimorph structure. The harvesting device exhibits a output power of about 100?W when the external resistance is 175kΩ, enough to drive a wireless tire pressure monitoring system. Advisor Committee Yung-Yu Chen - advisor
Files Date of Defense 2010-12-24 Date of Submission 2011-02-08