EMT中传感器位置偏差对成像结果的影响  

Effect of position deviation of sensor on imaging result in EMT

作　　者：王占军[1] 李柳[2,3] 

机构地区：[1]沈阳师范大学计算机与数学基础教学部,辽宁沈阳110034 [2]沈阳师范大学物理科学与技术学院,辽宁沈阳110034 [3]东北大学信息科学与工程学院,辽宁沈阳110004

出　　处：《传感器与微系统》2013年第3期40-42,共3页Transducer and Microsystem Technologies

基　　金：辽宁省自然科学基金资助项目(20102203)

摘　　要：以电磁层析成像(EMT)仿真系统为研究对象,讨论了检测线圈位置偏移和角度偏转对成像结果的影响。利用相对误差平均值、相对误差最大值和相对误差最小值等作为评价指标,比较了在二维空间上检测线圈各个轴向上位移偏差和角度偏转造成的检测值误差,给出了图像重建结果,得出结论:当测量数据存在噪声时,重建的图像位置会接近物场的边缘,即离近线圈传感器,对于校正传感器模型有实际意义。Electromagnetic tomography （EMT） simulation system is acted as the object of study. Effect of position deviation of the detection coils and angle deviation on imaging result are discussed. Using average value of relative error, the maximum value of relative error and the minimum value of relative error as evaluation index, in twodimensional space, the detection values caused by the coil axis displacement and the angle deflection are compared with the ideal values, and reconstructed images are given. It can draw a conclusion that when there are noise exists in measured data, the location of the reconstructed images will be close to edge of the object field , that is from near the coil sensor, which has practical meaning to correcting sensor model.

关 键 词：电磁层析成像 图像重建 位置偏差 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置]