Effect of electrode configuration on electricity generating capacity of piezoelectric cantilever
WANG Hong-yan1,2; XIE Tao1; SHAN Xiao-biao1; YUAN Jiang-bo1
1.School of Mechatronics Engineering, Harbin Institute of Technology, Harbin 150001,China;2. College of Computer and Control Engineering, Qiqihar University, Qiqihar 161006, China
Abstract：The strain distribution characteristic of a piezoelectric cantilever with a tip mass in the multimode vibration is studied in this paper. The effect of the location of electrode pairs on the voltage output of the piezoelectric cantilever is analyzed by the coupled piezoelectric-circuit finite element method. With the aim to measure the electricity generating capacity of the piezoelectric cantilever using the configuration with the segmented electrodes and the continuous electrodes around the first and second resonant frequency, an experiment measuring system was established, and the amplitude of the power output is compared. The results show that the power output of the segmented electrodes is closed to the power output of the continuous electrodes at the first vibration mode, but the peak power output of the segmented electrodes is increased about 900% at the second vibration mode. Compared with the continuous electrodes configuration, the segmented electrodes configuration can result in a significant increase of the electricity generating capacity of the piezoelectric cantilever at high frequency vibration.
2011, Vol. 30 
