Generating capacity analysis of 0–3 piezoelectric composite cantilever piezoelectric-vibrator

The piezoelectric vibrator constituted by 0–3 piezoelectric composite and medal cantilever transform the vibration energy into the electrical power to supply the power energy to the wireless sensor nodes. In this paper, the generating capacity analysis of the piezoelectric vibrator has been done by the way of combining the computer simulation and experiment research. The results show that the generating capacity is concerned with the structure size. The generating capacity is proportion to the length, inverse proportion to the width and thickness and there exist the best length specific value and thickness specific value (0.65). The double piezoelectric vibrator with the size of 60×20×0.6(mm) (free length 53) can generate 6.588V electric power. The generating capacity of piezoelectric vibrator can be the best when it works at its nature frequency. The mass bonded on the free end can reduce the nature frequency effectively.