In order to measure and study the electricity generating performance of the piezoelectric ceramics(PEC)

a measuring system for the electricity generating capacity of the PEC was developed. A piezoelectric unimorph cantilever was designed and the effect of optimal thickness ratios(ORT) for the piezoelectric unimorph cantilever analyzed by finite element analysis(FEM). The results show that the output voltage and power is maximal at the resonance frequency. The ORT of the piezoelectric unimorph cantilever is 0.5 by FEM. It was consistent with the experimental results. The output voltage of the piezoelectric cantilevers increases with the resistive load increased. The voltage approaches 5.4V when the resistive load is 50 . Nevertheless

the electrical power decreases when the load resistance is further increased. A maximal output power of about 1.18 mW can be obtained from the piezoelectric cantilever at the resonance frequency across a resistive load of 10

this power level is already enough for some wireless communication systems.