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相关概念视频

Errors in Global Positioning System01:26

Errors in Global Positioning System

36
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,...
36
Introduction to Global Positioning System01:30

Introduction to Global Positioning System

46
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,...
46
Field Application of Global Positioning System01:28

Field Application of Global Positioning System

30
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...
30
Types of Global Positioning System Surveys01:30

Types of Global Positioning System Surveys

49
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...
49
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

21
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...
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Design Example: Alignment of a Road Line Using GIS01:17

Design Example: Alignment of a Road Line Using GIS

38
The alignment of a road line using Geographic Information Systems (GIS) is a critical process in civil engineering, combining advanced technology with practical decision-making. This methodology begins with the collection of geospatial data, including information on land cover, geomorphology, drainage patterns, slope, and contour details. Such data is typically acquired through satellite imagery and GIS tools, offering a comprehensive understanding of the terrain.Once the data is gathered, it...
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相关实验视频

Updated: Jun 3, 2025

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一个具有视觉感知的弹性过算法用于车辆GNSS导航和定位.

Wenzhuo Ma1, Zhe Yue1, Zengzeng Lian1

  • 1School of Surveying and Mapping, Henan Polytechnic University, Jiaozuo 454003, China.

Sensors (Basel, Switzerland)
|January 8, 2025
PubMed
概括
此摘要是机器生成的。

本研究介绍了一种使用视觉感知的弹性过算法,以提高全球导航卫星系统 (GNSS) 在城市中的车辆的定位精度. 新方法显著提高了实时导航精度,特别是在复杂的城市环境中.

关键词:
有弹性的过器过.跨框架差分光流方法.车辆GNSS导航和定位系统视觉感知 视觉感知 视觉感知

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科学领域:

  • * 机器人和自主系统
  • * 计算机视觉 计算机视觉
  • * 地质工程工程学

背景情况:

  • * 精确的实时车辆定位在城市环境中至关重要,但对于当前的全球导航卫星系统 (GNSS) 算法来说具有挑战性.
  • * 由于城市的复杂性,现有的基于卡尔曼波器的GNSS方法缺乏所需的准确性.
  • *导航和视觉感知之间的协同作用为增强定位提供了潜力.

研究的目的:

  • * 开发一个与视觉感知集成的弹性过算法,以改进车辆GNSS导航和定位.
  • *通过将过模型适应不同车辆状态来提高GNSS导航的精度.
  • * 解决城市驾驶中频繁停车的挑战,以便更准确地定位.

主要方法:

  • * 采用视觉感知系统来捕获实时环境数据,并通过跨差光流和车辆状态切换来评估驾驶状态.
  • *设计了一种适应状态的弹性过模型,以提高基于卡尔曼过器的GNSS准确性.
  • * 整合了零速度约束,以在静止期间完善位置数据,并将其与适当的弹性过模型相匹配.

主要成果:

  • * 拟议的弹性过算法通过模拟和现实世界的实验,在城市环境中显著改善了车辆GNSS导航和定位精度.
  • * 性能优于传统算法和交互式多模型 (IMM) 算法.
  • *与先进的IMM模型相比,实现了21.8%,20.9%和31.3%的3D定位精度提升.

结论:

  • * 带有视觉感知的弹性过算法为在具有挑战性的城市环境中准确的车辆GNSS定位提供了强大的解决方案.
  • * 算法的适应性对各种车辆状态及其零速度约束有效地提高了定位精度.
  • *这种方法比现有实时城市导航系统的方法有了显著的进步.