电容传感器场灵敏度分布计算的有限元模型

根据电介质极化理论,构造一种新的有限元模型,规定了试样的形状、大小、数量、分布等·仿真结果表明,任意划分的有限元网格,灵敏度均匀性计算值之间的差别可达４４７５％,采用这种新的有限元模型,灵敏度均匀性计算数据之间的差别降低至７３％·说明该有限元模型相对于不同的试样分布、大小和数量有较好的一致性

New Finite Element Model for Calculating Sensitivities of Capacitance Sensors

A new kind of finite element model was recommended for sensitivity calculation of a capacitance sensor relying on the theory of electric polarization of dielectrics. The shape,size,amount and distribution of tested samples are prescribed for the new model. The difference among sensitivity homogeneity calculation is as high as 44 75% by arbitrary FEM models,and the difference is decreased to 7 3% using the new model. This illustrates the good identity of the new FEM model with different distributions,sizes and amounts of the test points.