立体网状静电传感器空间灵敏特性研究  

Study on the spatial sensitivity characteristics of three-dimensional grid shape electrostatic sensor

作　　者：冯阳博 高鹤明[1] 华灯鑫[1] 

机构地区：[1]西安理工大学机械与精密仪器工程学院,西安710048

出　　处：《仪器仪表学报》2015年第9期1953-1960,共8页Chinese Journal of Scientific Instrument

基　　金：国家自然科学基金(51406164;51405382);陕西省自然科学基础研究计划(2013JQ7005);陕西省教育厅专项(14JK1525);校科技创新(2013CX007)项目资助

摘　　要：提出一种全新的立体网状静电传感器,以克服现有静电传感器对流场内速度分布无法测量的不足。通过建立立体网状静电传感器的三维仿真模型,利用有限元分析法获得了立体网状静电传感器的灵敏度空间分布规律,并对其动态灵敏度进行了分析。结果表明:立体网状静电传感器具有局部敏感特性,对于管内颗粒分布比较敏感。而且由于其极棒间相互交错的特性,可以探测到颗粒的运动方向;传感器的动态灵敏度可以反映带电颗粒在各个极棒间的空间位置及其速度,即带电颗粒距离极棒交织点越近,速度越快,动态灵敏度越大。最后通过重力输送颗粒实验,证明理论分析的结果与实验结果一致,从而为立体网状静电传感器实现颗粒流动参数测量提供了理论依据。A new three-dimensional grid shape electrostatic sensor is presented in this paper to overcome the shortage that existing electrostatic sensors can not measure the velocity distribution in flow field. Through establishing the 3D simulation model of the three-dimensional grid shape electrostatic sensor, using the finite element method, the spatial sensitivity distribution of the three-dimensional grid shape electrostatic sensor is obtained, and its dynamic sensitivity is analyzed. The results show that the three-dimensional grid shape electrostatic sensor has local sensitive characteristic and is particularly sensitive to the distribution of the particles in the pipe. Due to its interleaved feature among the electrode rods, the sensor can detect the particle motion direction. The dynamic sensitivity of the sensor can reflect velocity is, the greater the dynamic sensitivity of the sensor is. Finally , the gravity conveying particle experiment was conducted, and the results prove that the theoretical analysis and experiment results are consistent, which provides a theoretical basis for the particle flow parameter measurement with three-dimensional grid shape electrostatic sensor.

关 键 词：立体网状 静电传感器 颗粒 速度 动态灵敏度 

分 类 号：TB934[一般工业技术—计量学] TH89[机械工程—测试计量技术及仪器]