新型非接触式径向C^4D传感器优化设计

Design and optimization of a new type of contactless radial C^4D sensor

基于电容耦合式非接触电导检测(C4D)技术,设计研发了一种新型径向结构的非接触式电导测量传感器。该传感器利用串联谐振的原理,引入电感模块以消除耦合电容对测量的不利影响,扩大了测量范围,提高了测量灵敏度。同时,用仿真与实验相结合的方法对传感器的电极张角进行了优化研究。在5.0、7.5、9.1、10.2和12.0 mm 5种不同内径的管道中进行了电导测量实验,电导测量相对误差均不超过5%,实验结果表明,所设计的新型非接触式径向C^4D电导测量传感器是可行和有效的。

Based on capacitively coupled contactless conductivity detection（C^4D） technology,a new contactless conductivity sensor with radial structure is designed and developed.Series resonance principle is used to overcome the unfavourable influence of the coupling capacitances by introducing an inductor.Since the background signal produced by the coupling capacitances can be eliminated,the measurement range of the developed radial C^4D sensor is extended,and the measurement sensitivity is improved.The electrode angle of the new radial C^4D sensor is optimized by the simulation results and experimental results.In order to verify the effectiveness of the developed sensor,conductivity measurement experiments are carried out in five insulated pipes with different inner diameters of 5.0,7.5,9.1,10.2 and 12.0 mm respectively,and the relative error of conductivity measurement is less than 5%.The experimental results show that the developed contactless conductivity sensor is feasible and effective.