| 基于最短路径射线追踪算法的混凝土无损检测 |
| |
| 引用本文： | 褚燕利,樊瑶. 基于最短路径射线追踪算法的混凝土无损检测[J]. 公路, 2011, 0(5) |
| |
| 作者姓名： | 褚燕利 樊瑶 |
| |
| 作者单位： | 武警工程学院通信工程系;西藏民族学院; |
| |
| 基金项目： | 西部交通建设科技项目,项目编号200431881222; 教育部新世纪优秀人才计划基金资助项目,项目编号NECT-0500849 |
| |
| 摘 要： | 混凝土结构的无损检测对于桥梁安全来说意义非凡。无损检测技术的基本目的是在不损伤构件的前提下,检测出物体中的缺陷,并确定其位置、大小和性质。在混凝土无损检测中常用的是超声层析成像代数重建技术(ART)。由于ART算法一般采用直线射线追踪,投影矩阵一经确定不再改变,不仅计算精度低,而且在异常体周边单元出现速度远离真值的现象。本文引入了最短路径(SPT)射线追踪,在每次ART迭代之前,利用SPT射线追踪重新计算投影矩阵,再进迭代计算。计算机仿真结果及混凝土试件实验结果表明:SPT射线追踪与ART相结合的算法具有更好的CT重建效果和消噪能力,并提高了计算的精度和图像重建质量。
|
| 关 键 词： | 道路工程 混凝土 图像重建 层析成像 最短路径 |
Non-destructive Testing of Concrete Based on Shortest Path Ray Tracing Algorithm |
| |
| CHU Yan-li,FAN Yao. Non-destructive Testing of Concrete Based on Shortest Path Ray Tracing Algorithm[J]. Highway, 2011, 0(5) |
| |
| Authors: | CHU Yan-li FAN Yao |
| |
| Affiliation: | CHU Yan-li1,FAN Yao2 (1.Correspondence Engineering Department,Engineering College of CAPF,Xi'an 710086,China,2.Tibet College of Nationalities,Xianyang 712082,China) |
| |
| Abstract: | Non-destructive testing of concrete structures for the bridge safety is significant.The basic purpose of NDT is under the premise that does not damage the components to detect defects in the object and determine its location,the size and nature.The ultrasonic tomography algebraic reconstruction technique(ART) commonly is used in Non-destructive testing of concrete.As a result of ART algorithm is generally used as a straight line ray tracing,if the projection matrix has been determined,it will not to change,... |
| |
| Keywords: | road engineering concrete image reconstruction computerized tomography shortest path |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
