| 1. |
- Ryberg, Anders, 1973-, et al.
(författare)
-
A new Camera Model and Algorithms for higher Accuracy and better Convergence in Vision-based Pose Calculations
- 2006
-
Ingår i: Mechatronics and Automation, Proceedings of the 2006 IEEE International Conference on. - 1424404657 ; , s. 194-199
-
Konferensbidrag (refereegranskat)abstract
- This paper presents novel strategies for better calibration and pose calculations of a system for determining the pose, i.e. position and orientation, of a camera. The system in question has a camera aimed to be placed on the hand of an industrial robot for welding, but is useful for any application with a need for measuring position and/or orientation. To calculate the pose of the camera circular reference points that can be recognized in the images are distributed in the working area. From their 2D image coordinates the 6D pose of the camera can be calculated. First the system is calibrated, i.e. the positions of the reference points and the camera parameters are determined. This is done by first taking images of the reference points from different locations, and then do a "total calibration" procedure to calculate the unknown parameters. For a specific system, called PosEye, it was concluded that the accuracy needs to be improved for welding applications. Also a method for making the calculations converge more easily, was needed. To meet these demands a new camera model is proposed, and three preprocessing calculation steps are presented. The new camera model increases accuracy by considering more distortion effects. The preprocessing steps give better initial values for more robust convergence of the algorithms and increased accuracy
|
|
| 2. |
- Wang, Lihui, et al.
(författare)
-
Web-based Rapid Machining in Distributed Manufacturing Environment
- 2006
-
Ingår i: 2006 IEEE International Conference on Mechatronics and Automation, ICMA 2006. - : Institute of Electrical and Electronics Engineers (IEEE). - 1424404657 ; , s. 441-446
-
Konferensbidrag (refereegranskat)abstract
- In the area of discrete part machining, companies in job shop operations are challenged frequently by the variety of products in small batch sizes. These challenges become even more critical with the manufacturing decentralization and outsourcing, where design offices and machining shop floors may not be co-located. To remain competitive in a global market, collaborative manufacturing is the norm for such companies. The objective of this research is to develop a framework named Wise-ShopFloor as well as the enabling technologies for collaborative manufacturing in a decentralized environment. Particularly, this paper presents our latest development on Web-based rapid machining. Once a product design is given, its process plan and NC codes are generated by using a distributed process planning (DPP) system. The NC codes are then used for remote machining through a standard Web browser and a Java GUI interface running inside of the browser. In this paper, the focus is given to the concept, architecture and prototype implementation of the enabling technology. A case study of a test part machining on a 5-axis milling machine is also completed for testing and validation. It is expected that the developed baseline technology can be applied to design verification through rapid machining and real part production in distributed manufacturing environment.
|
|
