多激励模式下的电容层析传感器优化设计  

Optimal Design of Electrical Capacitance Tomography Sensor Based on Multiple Excitation Modes

作　　者：杨博韬 王莉莉[1] 陈德运[1] 陈峰[1] YANG Bo-tao;WANG Li-li;CHEN De-yun;CHEN Feng(School of Computer Seience and Technology, Harbin University of Science and Technology, Harbin 150080, China)

机构地区：[1]哈尔滨理工大学计算机科学与技术学院,哈尔滨150080

出　　处：《哈尔滨理工大学学报》2022年第1期47-54,共8页Journal of Harbin University of Science and Technology

基　　金：国家自然科学基金(60572153,60972127);黑龙江省教育厅科学技术研究项目(11541040,12511097);黑龙江省青年科学基金(QC2012C059);黑龙江省博士后资助项目(LBH-Z11109).

摘　　要：针对电容层析成像(ECT)系统中传感器采集信号微弱,边缘化效应严重,介电常数变化不明显等问题,提出了一种基于多激励模式下的ECT传感器优化设计方案,该方案在优化了传感器物理参数的同时采用相邻双电极激励模式进行检测,增加了敏感场强度,在一次测量过程中可以获得更多的电容值,有效增加了传感器采集信号数量与采集精度。实验结果表明,优化后的ECT传感器能有效提高激励信号强度,减弱边缘化效应,改善传感器内部灵敏度矩阵,提高采集信号精度,图像重建质量明显提高。Aiming at the problems of weak sensor acquisition signal,serious marginal effect,and insignificant change in dielectric constant in the electrical capacitance tomography(ECT)system,an optimized design scheme of ECT sensor based on multiple excitation modes is proposed.This scheme optimizes the physical parameters of the sensor and adopts adjacent double the electrode excitation mode is used for detection,which increases the intensity of the sensitive field,and obtains more capacitance values in a measurement process,which effectively increases the number of signals collected by the sensor and the acquisition accuracy.The experimental results show that the ECT sensor with multiple excitation modes can effectively increase the excitation signal strength,reduce the marginal effect,improve the internal sensitivity matrix of the sensor,increase the accuracy of the acquisition signal,and significantly improve the image reconstruction quality.

关 键 词：电容层析成像 传感器优化设计 多激励模式 图像重建 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置]