A practical coordinate unification method for integrated tactile-optical measuring system

Feng Li; Andrew Peter Longstaff; Simon Fletcher; Alan Myers

doi:10.1016/j.optlaseng.2013.11.004

A practical coordinate unification method for integrated tactile-optical measuring system

Feng Li, Andrew Peter Longstaff, Simon Fletcher, Alan Myers

Research output: Contribution to journal › Article

14 Citations (Scopus)

Abstract

To meet the requirement of both high speed and high accuracy 3D measurements for dimensional metrology, multi-sensor measuring systems have been developed to measure, analyse and reverse engineer the geometry of objects. This paper presents a new development in coordinate unification called the "centroid of spherical centres" method, which can be used instead of the traditional method which uses three datum-points to perform the geometric transformation and unification of tactile and optical sensors. The benefits of the proposed method are improved accuracy in coordinate unification and the method is used to integrate a coordinate measuring machine (CMM) and optical sensors (structured light scanning system and FaroArm laser line probe). A sphere-plate artefact is developed for data fusion of the multi-sensor system and experimental results validate the accuracy and effectiveness of this method.

Original language	English
Pages (from-to)	189-196
Number of pages	8
Journal	Optics and Lasers in Engineering
Volume	55
DOIs	https://doi.org/10.1016/j.optlaseng.2013.11.004
Publication status	Published - 2014

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Li, F., Peter Longstaff, A., Fletcher, S., & Myers, A. (2014). A practical coordinate unification method for integrated tactile-optical measuring system. Optics and Lasers in Engineering, 55, 189-196. https://doi.org/10.1016/j.optlaseng.2013.11.004

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AB - To meet the requirement of both high speed and high accuracy 3D measurements for dimensional metrology, multi-sensor measuring systems have been developed to measure, analyse and reverse engineer the geometry of objects. This paper presents a new development in coordinate unification called the "centroid of spherical centres" method, which can be used instead of the traditional method which uses three datum-points to perform the geometric transformation and unification of tactile and optical sensors. The benefits of the proposed method are improved accuracy in coordinate unification and the method is used to integrate a coordinate measuring machine (CMM) and optical sensors (structured light scanning system and FaroArm laser line probe). A sphere-plate artefact is developed for data fusion of the multi-sensor system and experimental results validate the accuracy and effectiveness of this method.

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