Triangulation hand‐held laser‐scanning (TriHaLaS) for micro‐ and meso‐habitat surveys in streams

Triangulation hand‐held laser‐scanning (TriHaLaS) for micro‐ and meso‐habitat surveys in streams
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用于溪流中微观和中观栖息地调查的三角测量手持式激光扫描 (TriHaLaS)

DOI:
10.1002/esp.4310
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发表时间:
2018
影响因子:
3.3
通讯作者:
Wilkinson
Wilkinson
中科院分区:
地球科学2区
文献类型:
--
作者:
Wilkinson

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介绍了一种新型的手持式激光河床测量系统。该系统有助于捕获浅层(< 0.7米)河床地形的详细3D地图,剖面约为4米乘2米。该系统包括一个固定的参考系统,它投射三个激光片(两个在偏移角度),其中一个手持监控杆被移动。灯片的独特配置在杆子在测量区域内移动时与杆子拦截,从而提供精确的水平位置。极点倾斜由极点上的惯性测量单元补偿,并且相对于水平激光片监测极点床和淹没扫描激光器的高度。验证和应用测量表明,在水平(~5 mm)和垂直(~1 mm)方向上具有较高的分辨率和精度。该系统可以应用于自由视野受阻和其他光学通过水方法失败的地方。它适用于河床统计和动态的研究,这需要非侵入性的原位调查。版权所有©2017 John Wiley & Sons, Ltd
A novel hand‐held laser‐based stream bed survey system is presented. The system facilitates the capture of detailed 3D mapping of shallow (< 0.7 m) riverbed topography in sections approximately 4 m by 2 m. The system includes a stationary reference system, which projects three laser sheets (two at offset angles), within which a hand‐held monitoring pole is moved. The unique configuration of the light sheets intercepts with the pole as it moves within the survey area providing an exact horizontal location. Pole tilt is compensated for by an inertial measurement unit on the pole, and the height above the bed of the pole and submerged scanning laser are monitored relative to the horizontal laser sheet. Verification and application measurements demonstrate high resolution and accuracy in the horizontal (~5 mm) and vertical (~1 mm) direction. The system can be applied at sites where a free view is blocked and other optical through‐water methods fail. It is appropriate for studies on riverbed statistics and dynamics, which necessitate non‐invasive in‐situ surveys. Copyright © 2017 John Wiley & Sons, Ltd.
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