Evaluation of the electric parameters of piezoelectric materials

With the deflection of piezoelectric bimorphs under a certain voltage field and test data which were got using non-contact laser vibrometer, the electric parameters of piezoelectric ceramics can be obtained. Compared with the static state method which was a traditional method, the dynamic circuitry transmission method and the dynamic capacitance method, the method in this paper has less middle metrical tache and equivalence. Compared with dynamic displacement method, it has more high precision. So this paper shows a new method to evaluate the electric parameters of piezoelectric ceramic materials.