化工学报 ›› 2011, Vol. 62 ›› Issue (8): 2292-2297.

• 过程系统工程 • 上一篇    下一篇

螺旋表面极板电容式传感器的灵敏场分析

李虎,杨道业,程明霄   

  1. 南京工业大学自动化与电气工程学院,江苏 南京 210009
  • 出版日期:2011-08-05 发布日期:2011-08-05

Sensitivity analysis of capacitance sensor with helical shaped surface plates

LI HuYANG DaoyeCHENG Mingxiao   

  • Online:2011-08-05 Published:2011-08-05

摘要:

气固两相流质量流量的检测和控制是工业上长期未能有效解决的难题。从工业角度出发,采用电容层析成像技术建立了一种改进型螺旋表面极板电容式传感器。通过有限元仿真的方式,分析了极板张角、管壁介电常数、管壁厚度对灵敏场分布和均匀性误差参数的影响。通过仿真分析,确定了各传感器模型参数的取值范围,为灵敏场分布的改善、传感器的优化设计和传感器系统性能的提高提供了必要的理论基础。

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Abstract:

The measurement and control of mass flow rate of gas/solid two-phase flows have not been effectively solved for a long time in the industry.In this paper,a novel helical shaped surface plates capacitance transducer is designed for industrial point of view.It is based on the electrical capacitance tomography(ECT).The influence of the opening angle of electrode,the pipeline permittivity and pipeline thickness on sensitivity distribution and homogeneous error are analyzed by the method of finite element simulation.Through the simulation analysis,the range of model parameters can be fixed.Furthermore,it can provide the theoretical basis for development of sensitivity distribution,optimization of sensor and the performance of transducer.

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