Paper Title:
Optical Quality Control of High-Strength Structures

High-strength structure components can be built by the application of an advantageously designed geometry. These structures are challenging to manufacture due to their complex shape. This motivates the design of a new system for quality assurance of the geometric properties of these structures. Firstly, different measurement approaches and their usability for the measurement of high-strength structure components are discussed. Then an optimized solution is suggested. A pattern projection method is introduced, whereas the patterns adapt locally to the measured surface. The basic object of the research are methods of the optic three-dimensional measurement of structural elements with the help of adaptable pattern projection that allows to adjust the measuring process to the local geometry and reflecting characteristics of structural elements. This technique takes care of the special properties of high-strength structure components within the production process. It is described, how a measurement speed can be achieved that can catch up with a common production frequency without interrupting the flow of the parts. Furthermore, the measurement can take place in an industrial environment, because it is relatively tolerant to movements of the measured structure. Therefore, the measurement procedure is divided into two steps. Within the adaptation-step the luminescence and the resolution of the projected pattern is adapted to the measured object. The actual picture is taken and calculated in a second step in order to be robust against vibrations. The result of the measurement is an optimized point cloud of several million points. The paper concludes with a description of the data processing procedures necessary in order to evaluate the correctness of the measured structure.

Edited by
Heinz Palkowski and Kai-Michael Rudolph
B. Denkena, H. C. Möhring, W. Acker, E. Zaretskiy, "Optical Quality Control of High-Strength Structures", Advanced Materials Research, Vol. 137, pp. 295-316, 2010
Online since
October 2010
Authors: Yuri V. Chugui, Alexander G. Verkhogliad, Vladimir S. Bazin, Vadim E. Kalikin, Stepan V. Kalichkin, S. Makarov, Ignat A. Vykhristyuk
Abstract:Based on an optical structured light method an opto-electronic system for automatic noncontact distant measurements of wear and defects...
Authors: Deng Jie Wang, Guang Yue Wang
Chapter 3: Structural Rehabilitation, Retrofitting and Strengthening
Abstract:The positioning measurement of spatial curved surface steel structure project is a key link in construction process. How to measure position...
Authors: Xiang Fu Tan, Chao Xiong Xu, Rui Wen Shi, Wei Jian Guo, Tao Mao, Chun Yu Hu
Chapter 3: Measuring Technology and Mechatronics
Abstract:The universal tool microscope is widely applied in geometric measurement, as the imaging method is a typical measurement methods. In this...
Authors: Xue Li Zhang, Cun Wei Lu
Abstract:The aim of our research is to realize a high-sensitivity three-dimensional (3-D) shape measurement of target with an optical microscope. On...
Authors: Anita Avišāne, Janis Rudzitis, Gunārs Upītis, Janis Vilcāns
V. Measurement Techniques
Abstract:The common measurement error when measuring the component geometrical dimensions using universal contact measurement instruments is caused by...