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Development of Digital Detection System of Complex Surface Based on Features

Author: GengWeiTing
Tutor: JinTianGuo
School: Harbin Institute of Technology
Course: Mechanical and Electronic Engineering
Keywords: Feature Complex surface Digital testing Coordinate matching
CLC: TP274
Type: Master's thesis
Year: 2011
Downloads: 65
Quote: 0
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Abstract


Complex Workpiece surface of the three-dimensional digitized detection has been a key link to control the quality of products. The key technology is based on the characteristics of the surface of the workpiece, efficient, high-precision detection based on the geometry of the workpiece characteristics to develop the reasonable measurement path planning and design data processing algorithms applicable to specific types of measurement data. Relevant in the analysis of domestic and international the complex surface 3D digitizing detection research based on the feature-based detection technology is introduced into the the complex surface digitization detection system to design appropriate detection scheme based on the actual shape of the structure of the workpiece, The complex surface of the workpiece surface, thereby improving the detection efficiency and accuracy, in order to facilitate the transformation and analysis of the follow-up to the complex surface of the workpiece. On the basis of access to large amounts of the workpiece surface 3D detection technology information summarizes Complex Workpiece surface of three-dimensional digital detection principle and the detection process. Workpiece surface used digitized, the hardware part of the composition of the detection system and the detection of feature classification and expression, the feature-based detection technology application to complex surface surface digitization detection to. On this basis, Complex Workpiece surface of three-dimensional digital detection system based general framework. Program planning method based on the workpiece surface measurement, mechanical body motion parameters and laser scanning probe integrated into the planning of measurement programs to ensure the feasibility and efficiency of the planning program. According to the characteristics of the scan line point cloud data, given a suitable point cloud data preprocessing algorithm, including denoising of point cloud data, streamline processing and edge detection. Proposed algorithm based the VC STL file format data read by the principle of the linked list method to remove redundant point programming process. The measured point cloud data based on feature points the coordinates matching algorithm of object design CAD model, the transformation of traditional ICP algorithm to improve the efficiency of the measuring point data coordinate registration. Given evaluation methods and methods of expression of a detection error of the workpiece, a quantitative expression and analysis of the results of the error detection. Based on the above technology, Visual C 6.0 object-oriented programming language and OPENGL graphics to display programming interface detection system developed to verify the feasibility of the system, by design examples.

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation systems > Data processing, data processing system
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