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相关概念视频

Errors in Global Positioning System01:26

Errors in Global Positioning System

71
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,...
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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...
81
Distance Corrections01:15

Distance Corrections

51
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...
51
Common Leveling Mistakes and Errors01:17

Common Leveling Mistakes and Errors

101
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...
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Introduction to Global Positioning System01:30

Introduction to Global Positioning System

96
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,...
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Field Application of Global Positioning System01:28

Field Application of Global Positioning System

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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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Quantitatively Measuring In situ Flows using a Self-Contained Underwater Velocimetry Apparatus SCUVA
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在水下SINS/DVL综合定位和导航中研究纠错技术.

Jian Li1,2, Mingyu Gu1, Tianlong Zhu1

  • 1College of Internet of Things Engineering, Hohai University, Changzhou 213001, China.

Sensors (Basel, Switzerland)
|July 11, 2023
PubMed
概括

精确的水下导航依赖于像Strapdown惯性导航系统 (SINS) 和多普勒速度日志 (DVL) 这样的集成系统. 本研究重点是纠正SINS/DVL系统中的DVL错误,以提高水下定位准确度.

关键词:
多普勒速度日志.纠正错误的纠正错误的纠正集成定位和导航系统 集成定位和导航系统紧带式惯性导航系统 紧带式惯性导航系统

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科学领域:

  • 海洋技术 海洋技术
  • 机器人技术 机器人技术 机器人技术
  • 导航系统 导航系统 导航系统

背景情况:

  • 水下车辆需要精确的定位和导航来完成检查和操作任务.
  • 集成导航系统,通常称为Strapdown惯性导航系统 (SINS) 和多普勒速度日志 (DVL),将多个设备结合起来,以提高准确性.
  • 在SINS/DVL整合中的错误,包括安装偏斜和DVL测量不准确,降低了整体系统性能.

研究的目的:

  • 在Strapdown惯性导航系统 (SINS) /DVL集成定位和导航系统中调查和解决多普勒速度日志 (DVL) 的错误纠正技术.
  • 提高水下航行在关键任务中的准确性和可靠性.

主要方法:

  • 专注于SINS/DVL集成定位和导航系统作为主要研究对象.
  • 深入研究集成系统中的DVL组件的错误纠正技术.
  • 分析常见的错误,如安装偏差和固有的DVL测量错误.

主要成果:

  • 确定了DVL错误对SINS/DVL联合定位和导航的准确性的重大影响.
  • 开发和研究了针对DVL而定制的错误纠正方法,用于集成水下导航.
  • 证明了错误纠正对于实现可靠的水下操作的重要性.

结论:

  • 纠错技术对于提高SINS/DVL集成系统的性能至关重要.
  • 解决DVL特定错误对于准确的水下定位和导航至关重要.
  • 这些发现有助于提高可靠的水下检查和操作能力.