| 基于数字照相技术的边坡变形自动化监测技术研究 |
| A Study of the Application of Digital Photogrammetry in Slope Deformation Monitoring |
| 投稿时间：2011-04-21 |
| 中文关键词:数字摄影测量 数码相机 边坡监测 图像处理 亚像素 |
| 英文关键词:digital photogrammetry digital camera slope monitoring image processing subpixel estimation |
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| 中文摘要: |
| 将数字摄影测量技术应用于边坡位移自动监测。在边坡上布设固定标志点，将非量测数码相机置于边坡正面，运用程序控制相机间隔一定时间对边坡进行拍摄。对拍摄图像预处理后使用圆心亚像素识别算法确定测点亚像素位置。根据标志初始实际距离与初始相片像素距离建立物象比例，对比各次识别结果得到各测点实际的相对位移。运用GPS技术和计算机技术，本系统可实现数据交换、控制指令发送和预警的适时监控。本系统采用非量测数码相机，相对于传统边坡检测方法具有成本低，精度高，需要人工干预少等优点，现场试验50 m距离识别精度达到3 mm，取得较好效果，可以作为大量边坡自动化监测的有效手段。 |
| 英文摘要: |
| Digital photogrammetry technique is applied in the auto monitoring of slope displacement. Panels with symbol image are set on slope as survey points, and the camera is set on the opposite of slope, making sure that all of symbols are in the view. Since the stability of camera is very important, concrete reinforcement of the camera support is required. Distance between each point is measured with range finder. The digital camera keeps shooting at certain interval, and saving the photos. After pre image processing, bilinear interpolation and sub pixel recognition methods are used to get the accurate pixel position of survey points. Local coordination is created according to the relationship of actual distance and photo pixels distance, the relative displacement could be acquired by comparing identified results. By using wireless network connecting industrial control computer and server，this system can exchange data，send instructions and realize early warning. The identifying precision is 3 mm in 50 m in the site test. By using Non Metric digital camera, the control program with its SDK and wireless data terminal could be an effective method to monitor slopes for its low cost, high automatization and few manual intervention. |
| 罗仁立,刘学增.基于数字照相技术的边坡变形自动化监测技术研究[J].石家庄铁道大学学报(自然科学版),2011,(3):69-. |
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