矩阵式静电传感器空间滤波法测量颗粒局部平均速度的准确度与其灵敏度分布特性密切相关。本文基于静电感应原理和点电荷思想,建立了矩阵式静电传感器三维静电场模型,应用有限元法分析了电极长度和张角以及电极轴向间隔对传感器灵敏度特性的影响,并建立了传感器灵敏度几何无量纲模型。仿真计算结果表明:灵敏度沿轴向分布的周期性均由传感器结构决定,并且在中心截面上呈局部分布特性。 The accuracy of spatial filtering method of matrix electrostatic sensor in measuring local average velocity of particles is closely related to its sensitivity distribution. In this paper, based on electrostatic induction principle and point charge idea, a three-dimensional electrostatic field model of matrix electrostatic sensor was established. The influence of electrode length, aperture angle and axial distance between electrodes on the sensitivity characteristics of the sensor was analyzed by finite element method. Gang model. The simulation results show that the periodicity of the sensitivity along the axial direction is determined by the structure of the sensor and locally distributed in the central section.