Abstract
Considering the limited measurement range of a machine vision method for the three-dimensional (3D) surface measurement of large-scale components, a noncontact and flexible global measurement method combining a multiple field of view (FOV) is proposed in this paper. The measurement system consists of two theodolites and a binocular vision system with a transfer mark. The process of multiple FOV combinations is described, and a new global calibration method is proposed to solve the coordinate system unification issue of different instruments in the measurement system. In addition, a high-precision image acquisition method, which is based on laser stripe scanning and centre line extraction, is discussed to guarantee the measurement efficiency. With the measured 3D data, surface reconstruction of large-scale components is accomplished by data integration. Experiments are also conducted to verify the precision and effectiveness of the global measurement method.
Highlights
In the field of modern manufacturing and assembly, the accuracy of large-scale components of dimensions is required to guarantee automatic assembly of high-end equipment
Binocular vision is a method that uses binocular cameras to collect features projected onto surface to be measured and reconstruct the surface; a light probe based large field of view (FOV) 3D vision measurement system proposed by Feng and Wei, which is based on binocular vision, can measure the curved surface of a large-scale object [19]
The measurement system is a binocular vision system that consists of two theodolites and a transfer mark that is designed for the transition of views
Summary
In the field of modern manufacturing and assembly, the accuracy of large-scale components of dimensions is required to guarantee automatic assembly of high-end equipment. Studies of noncontact and flexible global measurement methods for 3D surface measurement of large-scale components are important for high-quality assembly in aerospace and aviation. NASA combined the ATOS system with the TRITOP system to measure X-38 aircraft [18], whereas too many moves of the method are needed, and quantity of mark points has to be stuck on the surfaces of parts ahead of measurement. Binocular vision is a method that uses binocular cameras to collect features projected onto surface to be measured and reconstruct the surface; a light probe based large FOV 3D vision measurement system proposed by Feng and Wei, which is based on binocular vision, can measure the curved surface of a large-scale object [19]. A novel global measurement method for 3D surfaces of large-scale components, which is based on a multiple field of view (FOV) combination, is proposed in this paper.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
