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Appl. Sci. 2017, 7(10), 1092; https://doi.org/10.3390/app7101092

T-Spline Based Unifying Registration Procedure for Free-Form Surface Workpieces in Intelligent CMM

1
State Key Laboratory of Precision Measuring Technology & Instruments, Tianjin University, Tianjin 300072, China
2
School of Engineering and Computer Science, University of Hull, Hull HU6 7RX, UK
*
Author to whom correspondence should be addressed.
Academic Editor: Kuang-Chao Fan
Received: 5 September 2017 / Revised: 9 October 2017 / Accepted: 17 October 2017 / Published: 23 October 2017
(This article belongs to the Section Mechanical Engineering)
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Abstract

With the development of the modern manufacturing industry, the free-form surface is widely used in various fields, and the automatic detection of a free-form surface is an important function of future intelligent three-coordinate measuring machines (CMMs). To improve the intelligence of CMMs, a new visual system is designed based on the characteristics of CMMs. A unified model of the free-form surface is proposed based on T-splines. A discretization method of the T-spline surface formula model is proposed. Under this discretization, the position and orientation of the workpiece would be recognized by point cloud registration. A high accuracy evaluation method is proposed between the measured point cloud and the T-spline surface formula. The experimental results demonstrate that the proposed method has the potential to realize the automatic detection of different free-form surfaces and improve the intelligence of CMMs. View Full-Text
Keywords: intelligent CMM; T-spline; unified model; discrete; high accuracy evaluation intelligent CMM; T-spline; unified model; discrete; high accuracy evaluation
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Han, Z.; Wang, Y.; Ma, X.; Liu, S.; Zhang, X.; Zhang, G. T-Spline Based Unifying Registration Procedure for Free-Form Surface Workpieces in Intelligent CMM. Appl. Sci. 2017, 7, 1092.

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