混凝土结构缺陷检测的探地雷达资料波场反演方法  

Wave field inversion method for nondestructive examination of concrete defect based on GPR data

作　　者：丁亮[1,2] 韩波[2] 刘润泽 

机构地区：[1]东北林业大学,哈尔滨150040 [2]哈尔滨工业大学,哈尔滨150001 [3]长江工程地球物理勘测武汉有限公司,武汉430000

出　　处：《地球物理学进展》2012年第1期376-385,共10页Progress in Geophysics

基　　金：中央高校基本科研业务费专项资金(DL12BB20)资助

摘　　要：本文针对工程建筑中的混凝土无损探测问题,提出了一种新的反演成像方法.它避免了传统方法观察偏移探测数据的情况.这种方法以探地雷达为探测手段,以电磁场原理为理论依据,其结果更具定量化和可视性.具体算法是将阻尼高斯牛顿法和GCV方法(Generalized Cross Validation)结合起来,其中阻尼牛顿法可以避免传统牛顿法计算Hessian矩阵的困难,GCV方法可以自适应地选择正则化参数,既减小了计算量又克服了噪声及不适定性的影响.数值算例验证了算法的有效性.According to concrete non-destruction detecting problem,we propose a new inversq imaging method. This method avoids the case that tranditional method always test the offset data. This method＇ s detecting means and theory are based on GPR and principle of electromagnetic field respectively, the solution is more quantify and visaul. This method combines the damping Gauss-Newton and GCV（Generalized Cross Valication）method, because damping Gauss-Newton method could avoid the difficulty of calculating Hessian matrix, CX;V method could self-adapting select regularized parameter,it not only reduces the calculated quantity but also overcomes the noise and ill-posed influence. Numerical simulation show the validity and feasibility of the algorithm.

关 键 词：混凝土 探地雷达 反演成像 MAXWELL方程 阻尼高斯牛顿 GCV函数 

分 类 号：P631[天文地球—地质矿产勘探]