关键词: 压电传感器, 声传感器, 各向异性圆柱振子

Abstract:

In this paper we have obtained a zero-order approximate solution of the partial differential equations with the separation of variables for the piezoelectric-ceramics-cylindrical vibrator on the assumptions of D1 =0 and D3=const. Using this solution, the modification of electric displacement D caused by the inverse piezoelectric effect can be calculated by the charge -continuity equation. By substituting the modificative D in the above partial differential equations, we get a first-order approximate solution for the vibrator. The theoretical solution is in agreement with the experimental measurements.

Key words: piezoelectric transducers, sound transducers, anisotropic cylindrical vibrator