Study On The Reverse Engineering (RE) Measurement Technology

Norasfadzila, Abu Hassan (2011) Study On The Reverse Engineering (RE) Measurement Technology. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

Many specialized applications such as engineering, industrial, medical, etc require precise dimensional measurement and three dimensional (3D) computer models of the real objects. The required precisions range is from micron to cm. This study focuses on the precision of non-contact measurement methods by using 3D Digitizer application (using ATOS) and close range digital photogrammetric measurement techniques (using Tritop) for dimensional measurement of a car rim. The accuracy were checked and verified with the Coordinate Measuring Machine (CMM), indicating precision of mm-level or better. The results obtained show the practicality of both systems, with accuracy ranging from several microns (for 3D Digitizer system) to several mm (for digital close range photogrammetric systems). The analysis shows at the datum for bolt holes (C-F) the design accuracy using ATOS is 0.03% while Tritop is undetectable, which is the maximum measuring area for Tritop is 10 x 10 m² and the minimum measuring area is 0.1 x 0.1 m². However ATOS and Tritop are faster than CMM in term of data processing and information gathering with percentage time reduction 75% (ATOS) and 63% (Tritop). The outcome from this research shows the practicality of the approach for many high precision applications.

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