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相关概念视频

Errors in Global Positioning System01:26

Errors in Global Positioning System

44
Global Positioning System (GPS) technology has revolutionized navigation and positioning, but its accuracy is often compromised by various errors. These errors, stemming from environmental, satellite, and receiver-related factors, require careful mitigation to ensure reliable performance across applications.Atmospheric ErrorsGPS signals travel through the Earth’s ionosphere and troposphere, introducing delays which affect accuracy. The ionosphere is strongly influenced by charged particles,...
44
Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device01:30

Design Example: Identifying the Locations of Monuments in the Field Using Global Positioning System Device

27
Surveyors use Global Positioning System (GPS) technology to measure the precise location and elevation of points on Earth. In a recent survey, GPS receivers were used to determine the coordinates and elevations of two park monuments. The process involved careful mission planning, data collection, and correction to ensure accuracy. The survey began with mission planning to identify optimal satellite visibility and minimize Position Dilution of Precision (PDOP). A geodetic control point...
27
Types of Global Positioning System Surveys01:30

Types of Global Positioning System Surveys

55
GPS surveying methods vary in application, accuracy, and data collection techniques, catering to diverse surveying and mapping needs. Static GPS, kinematic GPS, and real-time kinematic (RTK) surveying are widely used. Each technique offers distinct advantages.Static GPS involves placing one receiver at a known reference point and another at the target point. It collects exact positional data by observing multiple satellite ranges over an extended period, achieving centimeter-level accuracy for...
55
Field Application of Global Positioning System01:28

Field Application of Global Positioning System

42
The Global Positioning System (GPS) has become an indispensable tool in fieldwork, offering unparalleled precision and efficiency for surveying, navigation, and infrastructure development. By harnessing signals from a constellation of satellites, GPS receivers determine the location of objects with remarkable speed and accuracy, often completing calculations within a second.Advantages of Modern GPS TechnologyContemporary GPS receivers are designed to meet the practical demands of field...
42
Introduction to Global Positioning System01:30

Introduction to Global Positioning System

55
The Global Positioning System (GPS) revolutionized positioning on Earth, providing precise location data through satellite ranging. The GPS system was developed in 1978 by the U.S. Department of Defense  for military use, and it became available for civilian applications in 1983, transforming fields including navigation, fleet management, and time synchronization for telecommunications systems.GPS consists of satellites in medium Earth orbit, about 20,200 kilometers above the surface,...
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基于高精度地图和定位的增强路线规划和障碍回避.

Feng Zhang1, Leijun Li2, Peiquan Xu1,3

  • 1School of Materials Science and Engineering, Shanghai University of Engineering Science, Shanghai 201620, China.

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概括

这项研究介绍了机器人导航的先进算法,增强了高精度定位和避开障碍的功能. 改进的方法确保了更安全,更流的机器人运动和高效的多目标检测在复杂的环境中.

关键词:
在TEB算法中,TEB算法地图学家的算法算法.检查机器人检查机器人代式的最近点 (ICP)

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科学领域:

  • 机器人技术 机器人技术 机器人技术
  • 人工智能的人工智能
  • 计算机视觉 计算机视觉

背景情况:

  • 高精度定位和多目标检测对于机器人路径规划和避难障碍至关重要.
  • 现有的算法在动态环境中经常面临准确性和效率方面的挑战.

研究的目的:

  • 开发和验证一个集成系统,用于高精度的机器人定位和高效的多目标检测.
  • 提高机器人路径规划和避障能力.

主要方法:

  • 使用 Cartographer 算法进行地图生成.
  • 结合代的最近点 (ICP) 和占用概率算法用于点云扫描和匹配.
  • 实现了Sparse矩阵姿势优化,以提高定位准确度.
  • 开发了一种改进的定时弹性带 (TEB) 算法,用于安全和平稳的轨迹生成,并结合了路点调整和速度限制的关键因素.

主要成果:

  • 达到5厘米 (x,y) 内的定位精度和2°内的可控角度误差.
  • 将定位时间缩短了40%.
  • 证明了成功绕过多个障碍物的导航,机器人选择了障碍物较少的路径.
  • 确保机器人在转和接近目标时的平稳移动,最大限度地减少超越.

结论:

  • 拟议的综合系统结合了Cartographer,ICP,Sparse Matrix Pose Optimization和改进的TEB算法,对于高精度定位是有效的.
  • 增强的TEB算法可实现高效的多目标检测以及在有障碍的复杂环境中安全,平稳的机器人导航.