電容層析成像傳感器的敏感場受多相流介質分布的影響,即軟場特性為圖像重建帶來很大困難。為了提高重建圖像質量,對敏感場分布進行分析是非常必要的。采用有限元法,通過對敏感場場域采用兩種不同剖分形式的比較,提出一種新的場域剖分形式,對敏感場分布進行計算機仿真。實驗證明有限元模型是正確的,說明利用不等間距的剖分形式可以得到較好的仿真結果,具有較高的精度。
關鍵詞:電容層析成像;敏感場;計算機仿真;傳感器
Abstract : Sensor sensitivity field in electrical capacitance tomography ( ECT) is affected by the distribution of multiphase medium ,that is the peculiarity of soft field ,which brings great difficulty for image reconstruction. To improve the quality of image reconstruction ,it is necessary to analyze the distribution of sensitivity field. By using finte element method , comparing the two different plotting patterns to field ,put forward new plotting pattern which is computer simulation to the dis2 tribution of sensitivity field. Throug the experiments ,finite element model is right ,and simulation results will be fine and have good precision while adopting unequal interval plotting patterns.
Key words : electrical capacitance tomography(ECT) ; sensitivity field ,computer simulation ; sen2 sor