电阻层析成像传感器软场特性分析

ANALYSIS OF SOFT FIELD CHARACTERISTICS OF RESISTANCE TOTOMOGRAPHY SENSORS

电阻层析成像传感器的敏感场是软场 ,受被测介质的影响 .利用作者建立的 ERT仿真软件为工具 ,通过多种介质分布下灵敏度分布的计算与比较 ,研究了传感器的软场特性 .结果表明 ,不同的介质分布可导致灵敏度有正、负百分之几十的变化 .各处灵敏度变化不仅与场域内介质有关 ,还与该点在灵敏场中所处的位置有关 .

Resistance tomography sensor possesses a soft field . This field is distorted by the media material distribution to be measured . Using the ERT finite element method simulation software set up by authors in NEU , the sensitivity distributions under different media distributions were calculated . The soft field characteristics of resistance tomography sensor was investigated by comparing and contrasting these sensitivity distributions . Different phase distributions can result in several tenths increase or decrease in sensitivity values . The sensitivity value chage at each pixel correlates to not only the media distribution inside the field , but also the pixel position.