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相关概念视频

Field Application of Global Positioning System01:28

Field Application of Global Positioning System

41
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...
41
Types of Global Positioning System Surveys01:30

Types of Global Positioning System Surveys

53
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...
53
Introduction to Global Positioning System01:30

Introduction to Global Positioning System

48
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,...
48
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
Errors in Global Positioning System01:26

Errors in Global Positioning System

40
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,...
40
Electronic Distance Measuring Instruments01:30

Electronic Distance Measuring Instruments

30
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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相关实验视频

Updated: Jun 14, 2025

Using a Real-Time Locating System to Measure Walking Activity Associated with Wandering Behaviors Among Institutionalized Older Adults
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基于可见光通信的室内定位系统的调查

Ruofan Wang1, Guanchong Niu1, Qi Cao1

  • 1Guangzhou Institute, Xidian University, Guangzhou 510530, China.

Sensors (Basel, Switzerland)
|August 29, 2024
PubMed
概括

基于可见光通信 (VLC) 的室内定位系统 (IPS) 为传统方法提供了高精度,低成本的替代方案. 这些系统展示了精确室内定位的潜力,克服了GPS的局限性.

关键词:
室内定位系统 室内定位系统在本地化方案方案.性能比较 性能比较 性能比较系统设计 系统设计可见光通信可见光通信

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科学领域:

  • 室内定位系统 室内定位系统
  • 可见光通信 (VLC) 是一种可见光通信.
  • 本地化技术的技术本地化技术.

背景情况:

  • 像GPS这样的传统定位系统面临着室内环境的重大局限性.
  • 可见光通信 (VLC) 已成为室内定位的有希望的替代方案.
  • 基于VLC的IPS提供了高精度,低成本和能源效率.

研究的目的:

  • 为基于VLC的室内定位系统 (IPS) 提供全面的审查和类似教程的概述.
  • 将VLC-IPS与传统系统进行比较,强调其局限性.
  • 探索优化策略和系统参数,以提高性能.

主要方法:

  • 对各种定位系统进行比较分析.
  • 讨论基于VLC的IPS机制,性能指标和假设.
  • 检查诸如道建模,信号处理和本地化算法等因素.
  • 探索优化策略,包括调制,编码,功率控制和算法.
  • 分析系统参数,如LED放置,接收器灵敏度和发射功率.

主要成果:

  • 基于VLC的系统在受控环境中可以达到10厘米的定位精度.
  • 分析基于关键因素的复杂性,运行范围和效率.
  • 证明系统参数对能源效率和精度的影响.

结论:

  • 基于VLC的IPS为室内定位提供了可行的和有效的解决方案.
  • 优化策略和仔细的系统参数选择对于最大限度地提高性能至关重要.
  • 本综述提供了对基于VLC的IPS的潜力和挑战的深入见解.