Two-degree-of-freedom pipe selection mechanism using contraction and extension unit composed of single tube and its application to a gas pipe inspection robot

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  • ITO Fumio
    Department of Precision Engineering, Graduate School of Science and Engineering, Chuo University
  • SATO Hiroto
    Department of Precision Engineering, Graduate School of Science and Engineering, Chuo University
  • MANO Yuki
    Department of Precision Engineering, Graduate School of Science and Engineering, Chuo University
  • OKUI Manabu
    Department of Precision Mechanics, Faculty of Science and Engineering, Chuo University
  • NAKAMURA Taro
    Department of Precision Mechanics, Faculty of Science and Engineering, Chuo University

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Other Title
  • 単一チューブによる伸縮機構を利用した2自由度管路選択機構の提案とそのガス管検査用ロボットへの適用

Abstract

<p>This paper introduces a two-degree-of-freedom pipe selection mechanism using contraction and extension unit composed of single tube and a T branch experiment of an in-pipe mobile robot equipped with this mechanism. Household piping is used for gas transportation to each household. If the pipe is cracked or corroded due to long-term use, it becomes difficult to supply a stable gas. Therefore, inspection of household piping is necessary. The existing methods require a lot of time for the inspection or it is difficult to inspect the entire pipeline. Therefore, in this study we developed an inspection robot for home piping using a mobile robot. To date, the robots proposed have been able to bend in the direction along the pipeline, as the tip of the robot passively bends when passing through the curved pipe. However, at the branch pipe, there is no mechanism that actively bends the tip of the robot, and the pipe cannot be selected and moved in a specific direction. Therefore, this paper proposes the application of a small pipe selection mechanism combining a ball-point pen knock mechanism and a wire bending mechanism to an in-pipe mobile robot using the pressure difference of a single tube.</p>

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