A novel visual pipework inspection system

Rahul Summan, William Jackson, Gordon Dobie, Charles Norman MacLeod, Carmelo Mineo, Graeme West, Douglas Offin, Gary Bolton , Stephen Marshall, Alexander Lille

Research output: Contribution to conferencePaper

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Abstract

The interior visual inspection of pipelines in the nuclear industry is a safety critical activity conducted during outages to ensure the continued safe and reliable operation of plant. Typically, the video output by a manually deployed probe is viewed by an operator looking to identify and localise surface defects such as corrosion, erosion and pitting. However, it is very challenging to estimate the nature and extent of defects by viewing a large structure through a relatively small field of view. This work describes a new visual inspection system employing photogrammetry using a fisheye camera and a structured light system to map the internal geometry of pipelines by generating a photorealistic, geometrically accurate surface model. The error of the system output was evaluated through comparison to a ground truth laser scan (ATOS GOM Triple Scan) of a nuclear grade split pipe sample (stainless steel 304L, 80mm internal diameter) containing defects representative of the application – the error was found to be submillimetre across the sample.
Original languageEnglish
Number of pages8
Publication statusPublished - 16 Jul 2017
EventQNDE 2017 - Provo, United States
Duration: 16 Jul 201621 Jul 2017

Conference

ConferenceQNDE 2017
CountryUnited States
CityProvo
Period16/07/1621/07/17

Keywords

  • remote visual inspection
  • photogrammetry

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  • QNDE 2017

    Gordon Dobie (Participant)

    16 Jul 2017

    Activity: Participating in or organising an event typesParticipation in workshop, seminar, course

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