摘要
针对电容层析成像传感器相邻电极间耦合电容引起的测量噪声及传统传感器需根据被检测管道的外径变化而需重新制作安装的问题,设计了一种便携式、电极对于管道轴心距离(极间距)可调节的差分电极传感器。通过控制模块调节极间距,使单一传感器能够适用于外径在60~100 mm动态范围内变化的管道测量。采用差分电极结构,解决了传感器无法固定合适长度的径向电极的问题,消除了传感器内部分寄生器件引起的测量噪声。实验结果表明,新型传感器可实现多种不同外径的管道的检测,差分电极的使用提高了多相流成像质量。
The noise caused by the coupling capacitance between the adjacent electrodes of an electrical impedance tomography sensor was measured to help solve the problem that traditional sensors need to be rebuilt and installed according to the change in the outer diameter of the detected pipeline.A portable differential electrode sensor with an adjustable electrode to the distance between the axes of the pipeline(electrode spacing)was designed for these measurements.The control module adjusts the electrode spacing so that a single sensor can be used for pipe measurements with an outer diameter ranging from 60 mm to 100 mm in the dynamic range.The differential electrode structure allowed the sensor to fix the radial electrode of appropriate length and eliminated the measurement noise caused by some parasitic devices in the sensor.The experimental results show that the new sensor can detect pipes with different diameters,and the differential electrode improves the imaging quality of multiphase flow.
作者
马敏
王春波
Ma Min;Wang Chunbo(College of Electronic Information and Automation,Civil Aviation University of China,Tianjin 300300,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2023年第5期337-347,共11页
Laser & Optoelectronics Progress
基金
国家自然科学基金(61871739)。
关键词
传感器
电容层析成像
极间距
差分电极
sensors
electrical impedance tomography
electrode spacing
differential electrode
