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Low-reliability spatial avoidance navigation for positioning systems using UWB communications

Research Project

Project/Area Number 20K04379
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 20020:Robotics and intelligent system-related
Research InstitutionKyoto Institute of Technology

Principal Investigator

Higashi Yoshiyuki  京都工芸繊維大学, 機械工学系, 助教 (70585760)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
KeywordsUltra-Wide Band / 超広帯域無線 / ナビゲーション / 測位 / マルチラテレーション / DOP / UWB / 遺伝的アルゴリズム / 屋内測位 / アンカー配置 / レイトレース法 / 位置推定 / 自己位置推定 / Ultra Wide Band / 非GPS環境
Outline of Research at the Start

広い周波数帯域を使用する超広帯域無線(UWB:Ultra-Wide Band)通信は小型かつ省電力の装置で空間座標を直接取得できることから,非GPS空間における移動ロボットの位置座標把握に有効である.しかし屋内では壁等による電波の減衰から生じる通信安定性低下と,地上側UWBデバイスと移動ロボットとの位置関係により起きる推定精度低下により,空間座標を安定して高精度で取得し続けることは困難である.そこで,空間内の通信電波強度と推定精度分布をモデル化し,位置推定の信頼性を定量的に評価することで,位置推定精度の信頼性が高い空間のみを通るドローンの飛行ナビゲーションを目的としている.

Outline of Final Research Achievements

One of the positioning methods for robot navigation in environments where GPS cannot be used indoors is using Ultra-Wide Band (UWB) communication. In this method, when the radio wave strength received by the moving robot becomes weak, communication becomes unstable, and the positioning accuracy may also decrease depending on the geometric relationship with the ground stations placed around the robot.
The purpose of this study was to quantitatively evaluate the estimation accuracy based on the geometric relationship with the ground station by calculating the received radio wave strength of the robot when using UWB communication based on the ray tracing method. Using a map showing their distribution, it was demonstrated that a path passing only through the space with high reliability of position estimation accuracy could be generated by the A* algorithm.

Academic Significance and Societal Importance of the Research Achievements

これまでの屋内での電波測位では,電波の受信強度が低いエリアや測位精度が低下するエリアを減らすために,地上局を多数設置することで冗長性を確保し,死角を減らすことが行われている.本研究の成果により任意位置での測位信頼性を評価できるようになった.また,この指標に基づき必要最低限の地上局による最適配置も導くことができるため,社会実装時の導入コストや運用コストの低減にもつながるといえる.

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (3 results)

All 2023 2021 2020

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (1 results) (of which Int'l Joint Research: 1 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Autonomous Flight Using UWB-Based Positioning System with Optical Flow Sensors in a GPS-Denied Environment2023

    • Author(s)
      Higashi Yoshiyuki、Yamazaki Kenta
    • Journal Title

      Journal of Robotics and Mechatronics

      Volume: 35 Issue: 2 Pages: 328-337

    • DOI

      10.20965/jrm.2023.p0328

    • ISSN
      0915-3942, 1883-8049
    • Year and Date
      2023-04-20
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Automatic Anchor Caliburation for UWB-based Indoor Positioning Systems2020

    • Author(s)
      Yukiya Yasukawa, Yoshiyuki Higashi, Arata Masuda, Nanako Miura
    • Organizer
      IEEE REGION 10 CONFERENCE (TENCON)
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Patent(Industrial Property Rights)] 移動体、および移動体の位置を推定する方法2021

    • Inventor(s)
      東善之,安達基朗
    • Industrial Property Rights Holder
      東善之,安達基朗
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2021-194599
    • Filing Date
      2021
    • Related Report
      2021 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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