Spatially constrained scanning scheme applied for gap measurements

Mohammed Omar, Konda Reddy Thotti, Rohit Parvataneni, Yi Zhou, Abed Alraoof Mayyas, Ala Qattawi

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Purpose - The purpose of this paper is to investigate an optical-based scanning modality for the real-time measurements of automotive interior gaps. Design/methodology/approach - The hardware is based on a charge-coupled device detector acquiring a laser illumination. The laser is projected on multitude of substrates with different reflectivities and surface profiles; while the scanning is progressed manually through a hand-held setup. Findings - The proposed software identifies the optical gap location automatically and establishes a dynamic field of view. Research limitations/implications - The study conducts a tool reliability and repeatability study that yield an accuracy of 0.08mm and a repeatability of less than 6.5 percent as user bias. The developed hardware/software combination, when compared with two commercial systems; a 3D scanner and an industrially packaged sensor unit used for exterior gaps, which provided repeatability values of 24 and 17 percent, respectively, with accuracies of 1.5 and 0.34 mm. Originality/value - New hardware and software are developed in combination to operate effectively on different deco finish and gap separations.

Original languageEnglish (US)
Pages (from-to)239-245
Number of pages7
JournalSensor Review
Issue number3
StatePublished - 2011
Externally publishedYes


  • Automotive industry
  • Inspection
  • Lasers
  • Optical instruments
  • Optical measurement

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering
  • Electrical and Electronic Engineering


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