A technology for sewer pipe inspection (Part 2)

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A technology for sewer pipe inspection (Part 2)

Experimental assessment of a new laser profiler for sewer defect detection and quantification

Journal Article (2017)

Author(s)

Mathieu Lepot (TU Delft - Civil Engineering & Geosciences)

N. Stanic (TU Delft - Civil Engineering & Geosciences)

François H L R Clemens (Deltares, TU Delft - Civil Engineering & Geosciences)

Research Group

Sanitary Engineering

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

DOI related publication

https://doi.org/10.1016/j.autcon.2016.10.010 Final published version

To reference this document use

https://resolver.tudelft.nl/uuid:0504602a-4aae-4ae8-814a-e9a8cb1bbdef

More Info

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Publication Year

2017

Language

English

Research Group

Sanitary Engineering

Volume number

73

Pages (from-to)

1-11

Downloads counter

211

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.