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Introduction to Global Positioning System01:30

Introduction to Global Positioning System

93
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,...
93
Field Application of Global Positioning System01:28

Field Application of Global Positioning System

68
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...
68
Errors in Global Positioning System01:26

Errors in Global Positioning System

68
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,...
68
Types of Global Positioning System Surveys01:30

Types of Global Positioning System Surveys

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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...
78
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

78
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...
78
Issues And Trends In Healthcare Delivery System01:29

Issues And Trends In Healthcare Delivery System

5.7K
The issues and trends in healthcare delivery are constantly changing. The COVID-19 pandemic is one recent issue that wreaked havoc on healthcare systems, causing a shortage of healthcare workers, high demand for medicines and supplies, and increased medical expenditure due to a lack of insurance. Other issues include rising healthcare costs and care fragmentation.
Cost Containment
Payment for healthcare services has historically promoted adoption of costly and often unnecessary or inefficient...
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相关实验视频

Updated: Jul 20, 2025

Development of an Audio-based Virtual Gaming Environment to Assist with Navigation Skills in the Blind
09:01

Development of an Audio-based Virtual Gaming Environment to Assist with Navigation Skills in the Blind

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一个安全的ZUPT辅助室内导航系统使用区块链在GNSS拒绝的环境中.

Ali Shakerian1, Ali Eghmazi1, Justin Goasdoué2

  • 1Department of Electrical Engineering, École de Technologie Supérieure, Montréal, QC H3C 1K3, Canada.

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

本研究介绍了一种基于区块链的安全室内导航系统,使用双惯性测量单元 (IMU) 和零速度更新 (ZUPT). 它在没有外部信号的情况下实现准确的定位,增强数据完整性和隐私.

关键词:
区块链区块链区块链区块链区块链扩展的卡尔曼波器 (EKF)这就是GNSS-denied.室内导航 室内导航惯性测量单位 (IMU) 是指惯性测量单位.定位定位 定位定位一个安全的安全的安全.零速度更新 (ZUPT) 是指零速度更新.

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相关实验视频

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科学领域:

  • 机器人技术和自主系统
  • 网络安全 网络安全
  • 导航和定位 导航和定位

背景情况:

  • 全球导航卫星系统 (GNSS) 拒绝的环境对准确和安全的室内导航构成重大挑战.
  • 现有的室内导航系统通常依赖于外部基础设施或易受数据操纵的影响.
  • 区块链技术的整合为提高导航数据的安全性和可靠性提供了一个有希望的解决方案.

研究的目的:

  • 提出和评估一个新的基于区块链的室内导航系统.
  • 增强GNSS拒绝环境中的导航数据的准确性,安全性和隐私性.
  • 为了证明该系统适用于自动驾驶汽车,机器人和人类跟踪等应用.

主要方法:

  • 使用脚部安装的双惯性测量单元 (IMU) 设置进行运动传感.
  • 实施扩展卡尔曼波器 (EKF) 用于传感器数据融合和状态估计.
  • 使用零速度更新 (ZUPT) 算法来纠正传感器漂移并提高位置精度.
  • 利用基于区块链的低SWaP-C分散架构 (Hyperledger Fabric) 进行安全的数据管理.

主要成果:

  • 该系统展示了高交易处理能力 (每秒超过680个交易).
  • 在20分钟的测试中,实现了特殊的准确性和稳定性,平均根平均平方误差 (RMSE) 为1.2m,峰值RMSE为3.2m.
  • 提供了通过区块链利用增强数据完整性,隐私和安全性的明确证据.

结论:

  • 拟议的系统为GNSS无法使用的环境中室内导航提供了一个安全,准确和实用的解决方案.
  • 区块链技术有效地确保了导航数据的可靠性和不变性.
  • 该系统对外部信号的独立性使其成为各种自主和跟踪应用的多功能解决方案.