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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
Distance Corrections01:15

Distance Corrections

27
To achieve precise distance measurements, especially in surveying and construction, certain corrections must be applied to account for potential sources of error like the standardization errors, temperature variations, and slope adjustments.Standardization error emerges when measurement equipment undergoes changes, such as wear, repairs, or weather impacts. To address this, surveyors compare the equipment’s readings to a standard. This process identifies any deviation that might lead to...
27
Common Leveling Mistakes and Errors01:17

Common Leveling Mistakes and Errors

71
A survey team is tasked with determining the elevation difference between points Point A and Point B, separated by uneven terrain. They use a leveling instrument and a leveling rod.Common MistakesMisreading the Rod: During a backsight reading at Point A, the instrumentman observes the rod partially obscured by tall grass. Instead of reading 1.135 m, they mistakenly record 1.735 m due to the misalignment of the crosshair with the wrong graduation. This error adds 0.600 m to all subsequent...
71
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
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

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相关实验视频

Updated: Jun 25, 2025

Using a Real-Time Locating System to Measure Walking Activity Associated with Wandering Behaviors Among Institutionalized Older Adults
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位置感知范围错误纠正用于改进UWB定位.

Sander Coene1, Chenglong Li2, Sebastian Kram3

  • 1WAVES Group, Department of Information Technology, Ghent University-imec, 9052 Ghent, Belgium.

Sensors (Basel, Switzerland)
|May 25, 2024
PubMed
概括
此摘要是机器生成的。

我们引入了位置感知距离校正 (LARC),以提高超宽带 (UWB) 距离精度. 这种方法通过使用位置估计来纠正错误来提高本地化性能,在没有额外的硬件的情况下实现了显著的改进.

关键词:
在本地化,本地化.信号处理算法信号处理算法到达时间估计到达时间估计.超宽带技术的超宽带技术

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科学领域:

  • 机器人技术 机器人技术 机器人技术
  • 传感器融合式传感器
  • 无线通信无线通信

背景情况:

  • 现有的超宽带 (UWB) 距离校正方法依赖于通道信息.
  • 这些方法往往缺乏稳定性,并且可能过度适应.
  • 在没有额外的硬件的情况下,需要提高距离精度.

研究的目的:

  • 为UWB信号提供一个新的定位方案,位置感知距离校正 (LARC).
  • 通过将初步位置估计纳入校正模型来提高距离精度.
  • 为了提高本地化性能,而不需要额外的硬件,如惯性测量单元 (IMU).

主要方法:

  • 开发了LARC方案,将基于位置的特征集成到范围错误预测模型中.
  • 使用开放访问的UWB测量数据集,测量距离高达20米.
  • 在CPU上实时运行一个简单的回归模型.

主要成果:

  • 减少了58%的第90百分位 (P90) 范围错误,为一个看不见的轨迹减少了15厘米.
  • 提高了2D定位P90错误21%至18厘米.
  • 在移动金属物体的变化环境中表现出强度,实现56%更好的P90距离 (16厘米) 和17%的2D定位 (18厘米) 改进.

结论:

  • LARC方法显著提高了UWB范围和定位的准确性.
  • 该方法对环境变化具有稳定性,不需要额外的硬件.
  • 对于实时UWB定位,LARC提供了一个实用而高效的解决方案.