摘要
弹性波CT层析成像技术可以在不损伤混凝土构件内部结构的情况下对其内部缺陷的信息进行提取,再利用相关算法重建图像。对接收点阵列间的相关性加以考虑,通过线性变换的方法组合方程,进而得到了一种重构方程的反演算法。由此将线性静定方程转变为超静定方程,减小系数矩阵的条件数,从而达到了减小测量误差抑制噪声影响的目的。数值模拟结果表明:在相同条件下,反演得到的图像更为清晰。从实验数据上看,重建所得的图像噪声更小,对缺陷判别的准确度更高。
Elastic wave CT tomographic imaging technique can extract information of internal defects without damaging the internal structure of concrete members,and reconstruction image by some certain algorithm. This paper proposed a new algorithm of reconstruction equation which took the correlation of the receiver array into consideration,composite equation through linear transformation.Therefore,it turns the linear static equation into statically indeterminate equation and reduces the condition number of coefficient matrix,in order to achieve the objectives of reducing the measurement error and suppressing noise. The numerical simulation shows this method can obtain better images in the same condition,and the experimental evidence suggests this method has low noise and high accuracy in the process of defect discrimination.
出处
《重庆理工大学学报（自然科学）》
CAS
2017年第12期181-188,共8页
Journal of Chongqing University of Technology：Natural Science
关键词
弹性波
反演算法
方程重构
图像重建
elastic wave
inversion algorithm
refactor equation
image reconstruction
