| 壁画空鼓病害的探地雷达正演模拟检测 |
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| 引用本文： | 李最雄,杨涛,汪万福.壁画空鼓病害的探地雷达正演模拟检测[J].工程地质学报(英文版),2009,17(5):675-681. |
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| 作者姓名： | 李最雄 杨涛 汪万福 |
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| 作者单位： | 1.兰州大学土木工程与力学学院|兰州|730000 |
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| 摘 要： | 通常西藏壁画地仗层的厚度不足10cm，有效去除直耦杂波是利用高频探地雷达识别壁画空鼓病害的关键，在此基础上计算空鼓的厚度。模拟制作西藏壁画地仗，在其内部预设深度和厚度各不相同的规则空鼓，通过正演模拟试验确定探地雷达的采集参数，积累数据处理的经验，并比较不同雷达天线的性能。结果表明，针对RAMAC探地雷达和Ground Vision数据采集、后处理软件，时窗深度宜为3ns左右，采样频率应不低于142GHz，效果最明显的两个滤波器是带通滤波和抽取均道。当雷达天线与细泥层地仗耦合较好时，中心频率1.6GHz和2.3GHz的雷达天线均能准确检测出深3cm左右、厚约2cm的空鼓，1.6GHz天线的极限垂直分辨率约0.5 cm。
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| 关 键 词： | 壁画空鼓〓探地雷达〓模拟检测〓信号处理 |
FORWARD REPLICA MODELING FOR DETECTION OF DELAMINATION IN WALL PAINTINGS WITH GROUND PENETRATING RADAR |
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| Institution: | 1.School of Civil Engineering and Mechanics, Lanzhou University, Lanzhou|7300002.Key Scientific Research Base of Conservation for Ancient Mural Dunhuang Academy State Administration for Cultural Heritage, Dunhuang|7362003.Conservation Institute, Dunhuang Academy, Dunhuang|7362004.Technical and Service Center for Protection of Cultural Relics, Dunhuang Academy, Lanzhou|730000 |
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| Abstract: | As a rule,the thickness of wall painting plaster in Tibet is less than 10 cm.The ground penetrating radar(GPR) is applied to detection of delamination beneath wall painting plaster,It is quite a challenge task to remove directly the coupled noise waves in the radar profiling.So,size of the delamination can be determined accurately.Replica of Tibetan wall painting plaster is made and regular voids with different depths and sizes are set inside it.Then,the forward modeling detection is carried out in the repl... |
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| Keywords: | Wall painting Delamination Ground penetrating radar Modeling detection Signal processing Tibet |
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