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相关概念视频

Field Application of Global Positioning System01:28

Field Application of Global Positioning System

25
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...
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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

19
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...
19
Types of Global Positioning System Surveys01:30

Types of Global Positioning System Surveys

47
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...
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Errors in Global Positioning System01:26

Errors in Global Positioning System

32
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,...
32
Electronic Distance Measuring Instruments01:30

Electronic Distance Measuring Instruments

25
Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over short...
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Author Spotlight: Revolutionizing Remote Surgery with Augmented Reality and Robotics for Enhanced Precision and Accessibility
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一种基于蓝牙阵列/PDR融合的室内定位方法,使用SVD-EKF.

Chenhui Li1, Jie Zhen2, Jianxin Wu3

  • 1School of Geographical Sciences, Xinyang Normal University, Xinyang, 464000, China. lichenhui@xynu.edu.cn.

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|February 7, 2025
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概括
此摘要是机器生成的。

高精度的室内定位对AI至关重要. 本研究介绍了蓝牙阵列天线系统和单值分解扩展卡尔曼波器 (SVD-EKF) 融合方法,用于准确的室内导航,提高复杂环境中的稳定性和适应性.

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科学领域:

  • 测量和绘图科学 测量和绘图科学
  • 人工智能的人工智能
  • 无线通信无线通信

背景情况:

  • 高精度的室内定位对于人工智能应用是必不可少的.
  • 传统系统面临着不可预测的室内环境和信号反射的挑战.
  • 蓝牙信号阵列天线为准确的室内定位提供了潜力.

研究的目的:

  • 分析基于蓝牙信号的阵列天线角度测量和定位系统.
  • 为了解决多相问题,使用快速里埃转换 (FFT) 来进行频率估计.
  • 为复杂的室内环境开发一个强大的和适应性的融合定位方法.

主要方法:

  • 对蓝牙信号阵列天线原理的分析.
  • 使用快速里埃转换 (FFT) 估计频率.
  • 开发一种使用单值分解扩展卡尔曼波器 (SVD-EKF) 的蓝牙阵列/行人死亡计算 (PDR) 融合方法.
  • 扩展卡尔曼波器 (EKF) 的改进,包括用于共变矩阵分解的SVD和使用自我评估因子和Huber函数的适应因子.

主要成果:

  • 该系统在静态和动态室内测试中达到高精度,最大误差为0.3m (近) 和0.6m (远).
  • 与动态室测试中的EKF相比,SVD-EKF算法减少了0.05m的定位误差.
  • 在走廊区域,SVD-EKF提高了0.373米的精度,并提供了比传统EKF更流的定位.

结论:

  • 拟议的蓝牙阵列/PDR融合系统与SVD-EKF提供高精度,坚固和适应性的室内定位.
  • 该系统在复杂的室内环境中证明了可行性和有效性.
  • 这项技术为高精度室内定位需求提供了实用,易于部署的解决方案.