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粉体的气体输送过程中,颗粒的荷电包含了粉体速度、浓度及颗粒尺寸等大量信息,阵列式静电传感器是获取这些信息的重要手段,但由于静电传感器灵敏场的非均匀性,流型变化会给测量造成较大的误差。该文基于点电荷思想建立了阵列式静电传感器的三维静电场数学模型,并应用有限元法系统地分析了阵列式静电传感器的结构参数(包括电极的长宽尺寸、屏蔽罩的长度和半径,绝缘管道的厚度等)对传感器灵敏场分布特性的影响。最后结合理论分析和实验,证实了模拟结果的准确性,从而为实现阵列式静电传感器的优化设计提供了理论依据。
During the process of powder gas transportation, the particle charge contains a lot of information such as the velocity, concentration and particle size of the powder, and the array electrostatic sensor is an important means to obtain this information. However, due to the non-uniformity of the sensitive field of the electrostatic sensor, Type changes can cause large errors in the measurement. Based on the idea of point charge, a three-dimensional electrostatic field mathematical model of the array electrostatic sensor is established. The structural parameters of the array electrostatic sensor including the length and width of the electrode, the length and radius of the shield, The thickness of the insulated pipe, etc.) on the sensitive field distribution characteristics of the sensor. Finally, theoretical analysis and experiments are carried out to verify the accuracy of the simulation results, which provides a theoretical basis for the optimal design of the array electrostatic sensor.