CAJ | 학술논문

随着复合材料在民用飞机中越来越广泛的应用，复合材料缺陷的在线检测对无损检测技术提出了更高要求。为提高平面电容层析成像( ECT)系统的成像质量，从而提高其对复合材料缺陷的检测精度，对基于l1正则化的成像算法进行了研究。采用交替最小化方法进行数值计算，并结合迭代阈值法，对重建图像进行降噪。试验结果表明，与ECT中常用的Landweber、Tikhonov正则化等算法相比，该方法能够有效分辨物场中的不同介质，提高了成像质量和被测物体边缘分辨率。
수착복합재료재민용비궤중월래월엄범적응용，복합재료결함적재선검측대무손검측기술제출료경고요구。위제고평면전용층석성상( ECT)계통적성상질량，종이제고기대복합재료결함적검측정도，대기우l1정칙화적성상산법진행료연구。채용교체최소화방법진행수치계산，병결합질대역치법，대중건도상진행강조。시험결과표명，여ECT중상용적Landweber、Tikhonov정칙화등산법상비，해방법능구유효분변물장중적불동개질，제고료성상질량화피측물체변연분변솔。
Along with the composite materials have been used more widely in civil aircrafts, the online inspection of the defects of composite materials requests higher level non-destructive inspecting technology. In order to improve the imaging quality of planar electrical capacitance tomography ( ECT ) system for enhancing the inspection accuracy for defects of composite materials, the imaging algorithm based on l1-regularization is researched, by applying alternating minimization method for numerical calculation, and combining with the iterative threshold method, the noise reduction is conducted for the reconstructed images. The experimental results show that comparing with the commonly used Landweber or Tikhonov regularization algorithms, this method can effectively distinguish different media in object field, and improve the imaging quality and the resolution for the edge of the measured object.