...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Earth Surface Processes and Landforms: The journal of the British Geomorphological Research Group >Video-based gravel transport measurements with a flume mounted light table
【24h】

Video-based gravel transport measurements with a flume mounted light table

机译：基于视频的砾石运输测量，带水槽的照明台

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The study or bedload transport processes is constrained by an inability to monitor the mass, volume and grain size distribution or sediment in transport at high temporal frequencies. Building upon a previously published design, we have integrated a high-resolution (1392 x 1024 pixels) video camera with a light table to continuously capture images of 2-181 mm material exiting a flume. The images tire continuously recorded tit a rate of 15 to 20 frames per second and are post-processed using LabView (TM) software, yielding continuous grain-size-specific transport information oil a per second basis. The video capture rate is sufficient to record multiple images of each grain leaving (lie flume so that particle velocities can be measured automatically. No manual image processing is required. After calibration the method is accurate and precise for sediment in the 2 mm through to 45 mm grain size classes compared with other means of measuring bedload. Based oil a set of validation samples, no statistically significant difference existed between the D-10,D- D-16, D-25, D-50, D-75, D-84, D-90 and D-95 determined by sieving captured samples and the D-1 values determined with the system. Oil average the system overpredicted transport by 4 per cent (n = 206, SD = 42%). This error can he corrected easily by simply weighing the mass of sediment that leaves the flume. The technology is relatively inexpensive and provides high-resolution data on coarse sediment transport out of a flume. Copyright (C) 2008 John Wiley & Sons, Ltd.
机译：研究或床载运输过程受无法监测高时间频率运输中的质量，体积和粒度分布或沉积物的限制。在先前发布的设计的基础上，我们将高分辨率（1392 x 1024像素）摄像机与光台集成在一起，以连续捕获从烟道中排出的2-181 mm物料的图像。图像轮胎以每秒15到20帧的速度连续记录山雀，并使用LabView（TM）软件进行后处理，每秒产生连续的特定粒度的运输信息油。视频捕获率足以记录每个谷物残留物（地沟）的多个图像，因此可以自动测量颗粒速度。不需要手动图像处理。校准后，该方法对于2毫米至45毫米范围内的沉积物是准确而精确的与其他测量床载量的方法相比，其粒度等级为mm。D-10，D-D-16，D-25，D-50，D-75，D之间以油为基础的一组验证样品没有统计学上的显着差异-84，D-90和D-95是通过筛分捕获的样品确定的，D-1值是用系统确定的，平均系统过高预测的运油量平均会高出4％（n = 206，SD = 42％）。通过简单地称量离开水槽的沉积物质量，可以轻松地进行校正，该技术相对便宜，并提供了从水槽中运出粗沙的高分辨率数据。版权所有（C）2008 John Wiley＆Sons，Ltd.

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号