摘要
针对电容层析成像技术的局限性,提出了新型双阵列电容传感器。利用传感器相邻极板灵敏度不均匀的特点,通过测量相邻极板电容以获得传感器内部局部浓度,重建管道内部传感器截面的相浓度分布。建立有限元模型,对不同电极数的电容传感器结构进行分析,研究了管道介电常数、电极覆盖率等传感器参数对灵敏场不均匀度的影响,得出优化的传感器参数。实验结果显示,该方法可以有效获取传感器截面局部浓度。
Twin￣array capacitance sensor is proposed to solve the limitation of Electrical Capacitance Tomography ( ECT) . The sensitivity non￣uniformity of neighbor electrode is used to reconstruct the concentration distribution of cross section in the sensor pipeline. The sensor structures with different electrode number are analyzed by Finite El￣ement Method. The influence of the pipeline permittivity and the electrode coverage on sensitivity distribution is in￣vestigated. And the optimum sensor parameters are obtained. The experimental result indicated that local concentra￣tion of cross section can be extracted from the neighbor electrodes of array capacitance sensor effectively.
出处
《传感技术学报》
CAS
CSCD
北大核心
2014年第10期1336-1342,共7页
Chinese Journal of Sensors and Actuators
基金
国家自然科学基金项目(51106070)
华东理工大学煤气化及能源化工教育部重点实验室开放课题基金项目
关键词
电容传感器
双阵列
灵敏场
均匀性误差
电容层析成像
capacitance sensor
twin-array
sensitivity map
homogeneous error
electrical capacitance tomography
