A technology for sewer pipe inspection (Part 2): Experimental assessment of a new laser profiler for sewer defect detection and quantification

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7 Citations (Scopus)

Abstract

In order to test the laser-scanning device presented by Stanić, Lepot, Catieau, Langeveld and Clemens [1], laboratory experiments have been performed. Various objects, covering a wide range of sizes, shapes, materials, colours and reflectiveness, have been installed in a concrete pipe and scanned by the prototype in order to identify potential object characteristics that may affect measurement uncertainty and/or create bias. By taking into account both uncertainties (on scanned and measured sizes), scanned dimensions have been compared to measurements performed with a calliper or a ruler: overall the values are mutually consistent. The proposed prototype is suitable for sewer inspections: displaced joints, cracks, deposits can be accurately measured without any bias by comparison to CCTV. Uncertainty in the measurement appears to be unaffected by humidity or fat deposits.

Original languageEnglish
Pages (from-to)1-11
Number of pages11
JournalAutomation in Construction
Volume73
DOIs
Publication statusPublished - 1 Jan 2017

Keywords

  • Asset management
  • Bias
  • Camera
  • CCTV
  • Laboratory test
  • Laser
  • Linear infrastructure
  • Prototype
  • Uncertainty
  • Validation

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