Nuclear Engineering and Technology

  • 제40권5호
  • /
  • Pages.419-428
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  • 2008
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  • 1738-5733(pISSN)
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  • 2234-358X(eISSN)
한국원자력학회 (Korean Nuclear Society)
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VISUAL MEASUREMENT METHOD USING A CIRCULAR GROOVE IMAGE FOR MEASURING INTERNAL DEFECTS OF PIPES IN NUCLEAR POWER PLANT

  • Choi, Young-Soo (Nuclear Robotics Lab. Korea Atomic Energy Research Institute) ;
  • Jeong, Kyung-Min (Nuclear Robotics Lab. Korea Atomic Energy Research Institute) ;
  • Lee, Sung-Uk (Nuclear Robotics Lab. Korea Atomic Energy Research Institute) ;
  • Jung, Seung-Ho (Nuclear Robotics Lab. Korea Atomic Energy Research Institute)
  • 발행 : 2008.08.31
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초록

During the overhaul period of nuclear power plants in Korea, an ROV(Remotely Operated Vehicle) enters the cold-leg pipes connected with the reactor to examine the state of the thermal sleeves and their positions in the safety injection nozzles. To measure the positions of the thermal sleeves or scratches with video images recorded during the examination, time-varying camera parameters should be known, such as the focal length and principal points used for the capturing each video image. In this paper, we propose a camera calibration and measurement scheme by using a single image containing two circular grooves of a cylindrical nozzle whose radius and distance are known.

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참고문헌

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