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関連する概念動画

Types of Global Positioning System Surveys01:30

Types of Global Positioning System Surveys

118
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...
118
Field Application of Global Positioning System01:28

Field Application of Global Positioning System

88
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...
88
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

168
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...
168
Errors in Global Positioning System01:26

Errors in Global Positioning System

111
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,...
111
Absolute Motion Analysis- General Plane Motion01:24

Absolute Motion Analysis- General Plane Motion

271
Visualize a drone, with its propellers spinning rapidly, hovering mid-air. The fascinating movements and operations of this drone can be comprehended by applying the principle of general plane motion.
As the drone's propellers rotate, an upward force is generated that counteracts the force of gravity, enabling the drone to lift off from the ground. This initial movement of the drone is along a straight path, representing a form of translational motion. In this phase, every point on the...
271
Relative Motion Analysis using Rotating Axes-Problem Solving01:29

Relative Motion Analysis using Rotating Axes-Problem Solving

448
Consider a crane whose telescopic boom rotates with an angular velocity of 0.04 rad/s and angular acceleration of 0.02 rad/s2. Along with the rotation, the boom also extends linearly with a uniform speed of 5 m/s. The extension of the boom is measured at point D, which is measured with respect to the fixed point C on the other end of the boom. For the given instant, the distance between points C and D is 60 meters.
Here, in order to determine the magnitude of velocity and acceleration for point...
448

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関連する実験動画

Updated: Sep 9, 2025

Time Multiplexing Super Resolving Technique for Imaging from a Moving Platform
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内部GNSS拒否環境のためのモーションセグメンテーションダイナミックSLAM

Yunhao Wu1, Ziyao Zhang2,3, Haifeng Chen1

  • 1College of Electronic Information and Artificial Intelligence, Shaanxi University of Science and Technology, Xi'an 710021, China.

Sensors (Basel, Switzerland)
|August 28, 2025
PubMed
まとめ

OS-SLAMは,光学的なフローモーションセグメンテーションを使用して,ダイナミックな環境における同時ローカライゼーションとマッピング (SLAM) を強化します. この堅牢なシステムは,GPSが拒否された設定のエラーを大幅に削減します.

キーワード:
GNSS 拒否された環境ダイナミックなシーン光学流量セマンティック・セグメンテーション同時定住とマッピング

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関連する実験動画

Last Updated: Sep 9, 2025

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科学分野:

  • ロボット
  • コンピュータ・ビジョン
  • 人工知能

背景:

  • 同時に位置づけとマッピング (SLAM) は,GPSが拒否された環境において極めて重要です.
  • ダイナミックなオブジェクトと変数は,SLAMの位置精度に負の影響を及ぼします.
  • 動的なシーンで静的な要素のマップを作成することは重要な課題です.

研究 の 目的:

  • ダイナミックな環境のための堅牢なSLAMシステムを開発する.
  • GNSS のない環境で位置精度と地図の一貫性を向上させる.
  • 動的なオブジェクトが視覚SLAMに与える影響を減らすために.

主な方法:

  • オプティカル・フロー・モーション・セグメンテーションを統合したOS-SLAMを導入した.
  • 精密なモーションセグメンテーションのための軽量な多スケール光学フローネットワークを開発しました.
  • 非硬い物体を扱うためのYOLO最速とRigidmask融合アプローチを提案しました.
  • 不正常な点雲をフィルタリングすることで静的密度の高い点雲マップを生成します.

主要な成果:

  • OS-SLAMは,ダイナミックな環境で強化された堅実性を示しました.
  • このシステムは,ダイナミックなオブジェクトのローカライゼーションへの影響を大幅に軽減しました.
  • 実験結果は,TUMデータセットのORB-SLAM3と比較して,絶対位置誤差 (APE) と相対位置誤差 (RPE) の大幅な減少を示した.

結論:

  • OS-SLAMは,強固なSLAMのために,光学的なフローとモーションセグメントを効果的に統合します.
  • 提案された融合方法は,ダイナミックなオブジェクトによって引き起こされるミスセグメンテーションエラーを軽減します.
  • OS-SLAMは,ダイナミックなビジュアルSLAMタスク,特にGNSSが欠けている困難なシナリオで優れたパフォーマンスを提供します.