长江科学院院报 ›› 2017, Vol. 34 ›› Issue (12): 33-37.DOI: 10.11988/ckyyb.20160869

• 工程安全与灾害防治 • 上一篇    下一篇

基于新型FMCW地基合成孔径雷达的大坝变形监测

张昊宇1, 周克勤2, 宋亚腾3, 李莉莉1   

  1. 1.浙江海洋大学 船舶与机电工程学院,浙江 舟山 306022;
    2.北京建筑大学 测绘与城市空间信息学院,北京 100044;
    3.武汉理工大学 交通学院, 武汉 430063
  • 收稿日期:2016-08-25 出版日期:2017-12-01 发布日期:2017-12-22
  • 作者简介:张昊宇(1987-),男,安徽宿州人,讲师,博士,研究方向为地基与机载SAR,(电话)0580-2550051(电子信箱)haoyu19871202@163.com。
  • 基金资助:
    浙江海洋大学科研启动经费项目(21045012815);浙江省自然基金委青年基金项目 (LQ15F030007);浙江省教育厅项目(Y201432290)

A Novel FMCW GB-SAR Based Dam Deformation Monitoring

ZHANG Hao-yu1, ZHOU Ke-qin2, SONG Ya-teng3, LI Li-li1   

  1. 1.School of Naval Architecture and Mechanical-electrical Engineering, Zhejiang Ocean University, Zhoushan 306022, China;
    2.School of Mapping and Civic Space Information, Beijng University of Civil Engineering and Architecture, Beijing 100044, China;
    3.School of Transportation, Wuhan University of Technology, Wuhan 430063, China
  • Received:2016-08-25 Published:2017-12-01 Online:2017-12-22

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摘要： 大坝变形监测是确保大坝安全的重要一环。基于地基合成孔径雷达 (GB-SAR)的大坝变形监测相较于传统的方法拥有精度高、覆盖面大等优点。相较于国内通常使用的数据采集速度为5 min/组的意大利IBIS变形监测设备,采用新型的基于调频连续波(FMCW)技术的Fast-GBSAR设备对陆水大坝进行监测,取得了7 s/组的数据采集速度,对大坝在放水前后的变形进行分析,并与三维数字高程模型进行数据融合。结果表明基于7 s/组的高速数据采集能力,Fast-GBSAR几乎可以做到对大坝变形的实时分析,在变形监测领域极具潜力。

关键词: 地基合成孔径雷达, 调频连续波, 大坝变形监测, 精度分析, 三维数字高程模型

Abstract: Dam deformation monitoring is an important task to refrain from hazardous situation for dam and population. The use of Ground Based Synthetic Aperture Radar (GB-SAR) provides great potential for dam deformation monitoring due to its strong capability of large area and high accuracy. In this paper, a Fast-GBSAR based on the Frequency Modulated Continuous Wave (FMCW) technology is presented to monitor the dam deformation when the dam discharges water. The data acquisition speed of the Fast-GBSAR could achieve 7 second per set, compared with 5 minute per set acquisition speed of the IBIS system. Besides, the SAR image is also combined with the DEM model to evaluate the overall deformation of the dam. Analytical results show that dam monitoring based on Fast-GBSAR can be nearly in real time.

Key words: GB-SAR, FMCW, dam deformation measurement, accuracy analysis, 3D DEM

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