| Railway Track Verification Using a Forward-Looking SAR GPR |
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| 引用本文： | Tai-Yin Zhao Zheng-Ou Zhou. Railway Track Verification Using a Forward-Looking SAR GPR[J]. 中国电子科技, 2007, 5(2): 167-171 |
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| 作者姓名： | Tai-Yin Zhao Zheng-Ou Zhou |
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| 作者单位： | School of Electronic Engineering, University of Electronic Science and Technology of China （UESTC）, Chengdu, 610054, China |
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| 摘 要： | It is a challenge to evaluate the conditions of railway track without interruption of regular traffic. In this paper, the authors introduce the detection of cavities under the railway substructure by using forward-looking ground penetrating radar （FLGPR）. Main advantages of FLGPR are that such a system can illuminate a large area and can stand off a long distance over its down-looking counterpart. Two methods, frequency wave-number （F-W） synthetic aperture imaging （SAI） and beam-forming by delay and sum （DAS）, are applied to process the collected data. Analysis and measuring show that the distinct radar image of the cavity beneath the substructure 1.2 m deep can be formed by these two methods.
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| 关 键 词： | 铁路轨道验证 雷达成像 铁道审查 人造孔径成像 |
| 修稿时间： | 2006-11-012006-12-21 |
Railway Track Verification Using a Forward-Looking SAR GPR |
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| Tai-Yin Zhao,Zheng-Ou Zhou. Railway Track Verification Using a Forward-Looking SAR GPR[J]. Journal of Electronic Science Technology of China, 2007, 5(2): 167-171 |
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| Authors: | Tai-Yin Zhao Zheng-Ou Zhou |
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| Affiliation: | School of Electronic Engineering, University of Electronic Science and Technology of China (UESTC), Chengdu, 610054, China |
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| Abstract: | It is a challenge to evaluate the conditions of railway track without interruption of regular traffic. In this paper, the authors introduce the detection of cavities under the railway substructure by using forward-looking ground penetrating radar (FLGPR). Main advantages of FLGPR are that such a system can illuminate a large area and can stand off a long distance over its down-looking counterpart. Two methods, frequency wave-number (F-W) synthetic aperture imaging (SAI) and beam-forming by delay and sum (DAS), are applied to process the collected data. Analysis and measuring show that the distinct radar image of the cavity beneath the substructure 1.2 m deep can be formed by these two methods. |
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| Keywords: | Forward-looking ground penetrating radar radar imaging railway track inspection synthetic aperture imaging |
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