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相关概念视频

Methods of Obtaining Topography01:25

Methods of Obtaining Topography

85
Topography involves measuring and mapping land elevations, natural features, and artificial structures to create accurate representations of the terrain. Topographic surveying relies on traditional and modern methods, each with distinct advantages and limitations.Traditional Surveying Methods:Transit stadia surveys and plane table surveys were widely used traditional surveying methods. These techniques relied on instruments like theodolites and stadia rods for measuring distances and angles,...
85
Topographic Surveying and Contours01:29

Topographic Surveying and Contours

126
Topographic surveying is critical for documenting the Earth's surface, focusing on capturing elevations, slopes, and natural and man-made features. It is essential in construction planning, water resource management, and land-use analysis. The primary outcome of such surveys is a topographic map, which uses contour lines to visually represent the shape and slope of the terrain, providing valuable insights into the landscape's characteristics.Contour lines are fundamental to understanding the...
126
Profile Leveling and Cross Sections01:26

Profile Leveling and Cross Sections

326
Profile leveling and cross-sections are surveying methods used to determine and document terrain elevations for infrastructure projects such as highways, railroads, canals, and pipelines. These methods provide data for earthwork planning and alignment of proposed routes.  Profile leveling involves measuring elevations along a fixed line to create a vertical terrain profile. A surveyor sets up a leveling instrument at the benchmark (BM) and records a backsight (BS) to determine the...
326
Typical Model Studies01:30

Typical Model Studies

382
Fluid mechanics model studies often utilize scaled-down systems to predict fluid behavior in full-scale environments, such as river flows, dam spillways, and structures interacting with open surfaces. Maintaining Froude number similarity in river models is crucial, as it replicates surface flow features like wave patterns and velocities.
382
Modeling and Similitude01:12

Modeling and Similitude

291
Scaled modeling is a fundamental technique in engineering, enabling the study of large and complex systems by creating smaller, manageable replicas that recreate critical characteristics of the original. In hydrology and civil infrastructure, for example, scaled models of dams help analyze water flow, turbulence, and pressure. This method allows for accurate predictions of real-world behavior within a controlled environment, significantly reducing the cost and time involved in full-scale...
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相关实验视频

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Detection and Quantification of Tunneling Nanotubes Using 3D Volume View Images
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从点云生成实用道的拓一致的BIM模型.

Lei Yang1, Fangshuo Zhang2, Fan Yang2,3,4

  • 1School of Transportation and Civil Engineering, Nantong University, Nantong 226019, China.

Sensors (Basel, Switzerland)
|July 29, 2023
PubMed
概括

这项研究引入了一种新方法,用于使用3D激光扫描数据准确建模地下公用事业道. 该方法提高了建筑信息建模 (BIM) 对象的拓一致性,这对于城市基础设施发展至关重要.

关键词:
层次的细分是指层次的细分.一个点云,一个点云.扫描到BIM的方法拓结构重建 拓结构重建公用事业道的道.

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科学领域:

  • 地理学工程 工程地质学
  • 土木工程 土木工程是指土木工程.
  • 计算机视觉 计算机视觉

背景情况:

  • 城市地下空间开发对于应对城市挑战至关重要.
  • 公用事业道是必不可少的基础设施组成部分,需要精确的调查.
  • 在公用事业道中的3D激光扫描面临着噪音和阻塞等挑战,影响数据质量和BIM拓.

研究的目的:

  • 为公用事业道数据提出一个层次的点云细分方法.
  • 为公用事业道中的建筑信息建模 (BIM) 对象开发一个强大的拓重建方法.
  • 为了解决几何元素提取中的不准确性,并确保重建的BIM模型的拓一致性.

主要方法:

  • 点云的层次细分成立面,平面和管道.
  • 一个改进的平均移位算法用于提取墙线特征.
  • 一个基于局部对称的中间轴提取算法用于管道识别.
  • 基于邻居搜索的方法,根据墙壁和管道中线重建拓一致的BIM模型.

主要成果:

  • 成功分割点云并提取公用事业道中的关键特征.
  • 从真实世界的数据集中重建了24个BIM墙壁对象和12个管道.
  • 证明了提出的方法在创建拓一致的3D实用道模型中的效率和有效性.

结论:

  • 提出的层次细分和拓重建方法显著提高了公用事业道BIM模型的准确性和一致性.
  • 这种方法克服了复杂的地下环境中传统3D激光扫描的局限性.
  • 经过验证的方法提高了BIM在城市地下基础设施管理和规划方面的可靠性.