摘要
采用电磁层析成像(electromagnetic tomography,EMT)技术实现对金属缺陷的可视化,克服了传统的检测技术无法对缺陷进行可视化的不足。首先设计了一种新型的平面EMT传感器,其次根据缺陷分布的稀疏性,提出了l1正则化稀疏成像算法。该算法能够有效避免传统的l2正则化算法带来的过度光滑的问题,成像更加精确。最后为证明该算法相对于l2正则化算法的优越性,进行了仿真和实验。仿真和实验结果均表明l1正则化稀疏成像算法能够有效提高缺陷图像的重建质量和精度。
Electromagnetic tomography (EMT) technology is used to realize the visualization of metal defects, which overcomes the lack of visualization of traditional testing technology. Firstly, a new planar sensor is designed. Secondly, according to the sparsity of defect distribution, the l1 regularized sparse imaging algorithm is proposed. The l1 regularization algorithm effectively overcomes the excessive smooth problem associated with traditional 12 regularization algorithm, whose imaging results are more accurate. Finally, in order to further prove the superiority of the new algorithm compared with l2 regularization algorithm, the simulation and experiment are conducted. The results show that sparse imaging algorithm can effectively improve the quality and accuracy of the defects images.
作者
王琦
崔莉莎
汪剑鸣
孙玉宽
王化祥
Wang Qi Cui Lisha Wang Jianming Sun Yukuan Wang Huaxiang(School of Electronics and Information Engineering Tianjin Polytechnic University, Tianjin 300387, China Tianjin Key Laboratory of Optoelectronie Detection Technology and Systems, Tianjin 300387, China School of Electrical Engineering and Automation Tianjin University,, Tianjin 300072, China)
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2017年第9期2291-2298,共8页
Chinese Journal of Scientific Instrument
基金
国家自然科学基金(61373104
61402330
61405143
61601324)
天津市应用基础与前沿技术研究计划(15JCQNJC01500)项目资助