IDEs1-3型压电纤维传感元件的性能研究与仿真

分析了叉指形电极(IDEs)1-3型压电纤维复合材料传感元件的结构特点和电场特性,构建了压电纤维传感元件的本构方程,并建立了IDEs1-3型压电纤维传感元件的有限元模型,探索了IDEs关键尺寸和压电纤维直径及间隔对传感元件传感性能的影响.结果表明:该传感元件X向产生的电位移大小约为Y向产生电位移大小的3倍,正交异性更加明显,能清楚区分不同方向的应力波;选择合适的纤维间隔,减小电极中心距、电极面宽度和纤维直径能有效的改善传感元件的传感性能.

Study and Simulation on Performance of IDEs 1-3 Mode Piezoelectric Fiber Sensor

The structural features and electric field characteristics of IDEs1-3 mode piezoelectric fiber sensor were presented, and the constitutive relations were constructed. Based on the piezoelectric-effect, the finite element simulation was applied to analyze sensing properties by ANSYS software, at the same time the effect of the structural size on performance of IDEs1-3 mode piezoelectric fiber sensor was explored. All the results show that the electric displacement produced in X by this sensor is about three times of that produced in Y , thus this sensor has more obvious orthotropy and can distinguish stress waves from the different directions. Furthermore,it can improve the performance of the sensors by selecting the suitable fibers spacing and reducing the electrode spacing, the electrode width and the diameters of fibers.