电阻层析成像技术最优激励与测量模式的研究

摘要

Excitation and measurement mode of Electrical Resistance Tomography (ERT) system would determine the sensitivity, information quantity and noise immunity of the test field.In this paper, a 16-electrode ERT system was cited to conduct a research on 8 excitation modes and 2 measurement modes by numerical analysis.The number of independent measurement, is opotential line distribution were compared as well as the amplitude and sensitivity characteristics of measured voltage.Based on an overall consideration of various factors, Mode 7 and the reference measurement mode are considered to be the best choices.%电阻层析成像(Electrical Resistance Tomography, ERT)系统的激励、 测量模式决定了被测场的敏感程度、 测量信息量和抗噪性.本文以16电极的ERT系统为例, 采用数值分析方法, 对ERT的8种激励模式和2种测量模式进行研究, 分别从独立测量数、 等势线分布、 测量电压的幅值特性和敏感特性4个指标进行综合比较, 最终确定ERT系统的最优激励为Mode7激励模式(激励电极间6模式), 最优测量模式为参考测量模式.