Data Process for Reverse Engineering Technology

2012 ◽  
Vol 549 ◽  
pp. 1012-1016
Author(s):  
Hui Guo ◽  
Yan Hui Hu ◽  
Xiao Jing Li
Keyword(s):  
Reverse Engineering ◽  
Coordinate Measuring Machine ◽  
Complex Data ◽  
Practical Application ◽  
Engineering Technology ◽  
Data Process ◽  
Surface Data ◽  
Data Points ◽  
Measuring Machine ◽  
Fitting In

Reverse engineering has become an important tool for CAD model construction from the data points, measured by a coordinate measuring machine (CMM), of an existing part. However, due to special structure and complex topology relation, obtaining full surface data of a prototype is not an easy thing and should carry out complex data process procedure to get global model. The paper presents a method for pre-processing data points for curve fitting in reverse engineering. The proposed method has been developed to process the measured data points before fitting into a B-spline form. The method is implemented and used for a practical application in reverse engineering. The result of the reconstruction proves the viability of the proposed method for integration with current commercial CAD systems.

Reconstructing of Prototype Surface with Reverse Engineering and Data Process Technology

2010 ◽  
Vol 458 ◽  
pp. 368-373 ◽  
Author(s):  
Dong Man Yu ◽  
Xiao Jing Li ◽  
Yi Xiong ◽  
Zhi Hua Gao ◽  
D. Wang
Keyword(s):  
Reverse Engineering ◽  
Measurement Data ◽  
Coordinate Measuring Machine ◽  
Physical Object ◽  
Engineering System ◽  
Complex Data ◽  
Process Technology ◽  
Noise Elimination ◽  
Data Process ◽  
Measuring Machine

Design and manufacture of pioneer products with lower cost and shorter cycle is a major mission for an enterprise, and reverse engineering (RE) plays an important role in accelerating product research and borrowing ideals from other business. However, due to special structure and complex topology relation, obtaining full surface data of a prototype is not an easy thing and should carry out complex data process procedure to get global model. This paper describes the origin point cloud acquisition method and the data processing steps for better point quality. Based on reverse engineering system of a toy prototype, a fine surface reconstruction module is developed. Measurement data are acquired by scanning the physical object using three-dimensional coordinate measuring machine (CMM) and an optical scanning device. The model establishment and data process of the prototype, such as noise elimination, data interpolation, data smoothing, data filtering, data splicing and surface reconstructing are conducted subsequently. Through processing of measurement data, the authors succeed in creating a CAD model of the prototype and gaining a good result.

The Modeling Design of Plastic Ashtray Technology and Rapid Prototyping Technology Based on Reverse Engineering

2014 ◽  
Vol 889-890 ◽  
pp. 9-13
Author(s):  
Zhi Yang Li ◽  
Xiao Mei Wang ◽  
Yu Zhu ◽  
Ming Yu Huang ◽  
Hong Jun Ni
Keyword(s):  
Rapid Prototyping ◽  
Reverse Engineering ◽  
Geometric Modeling ◽  
Three Dimensional ◽  
Coordinate Measuring Machine ◽  
Production Costs ◽  
Production Cycle ◽  
Engineering Technology ◽  
Surface Data ◽  
Measuring Machine

Reverse engineering is a process of using 3D geometric modeling method to reconstruct actual objects CAD model based on these points, which is used physical digital measuring equipment to measure the three-dimensional coordinates of points on the surface of the object accurately and rapidly. Based on reverse engineering technology as the theoretical basis, the paper used three-coordinate measuring machine to measure ashtray surface data. After data was be handled, which was used to reconstruct 3D entity in Pro/E software. Last, the 3D entity of ashtray was printed out through rapid prototyping machine, which can be achieved by physical sample to rapid manufacturing of products, shortening production cycle, reducing production costs.

Modeling and Numerical Control Machining of the Mould of a Rearview Mirror of a Motorcycle Based on the Reverse Engineering Technology

2012 ◽  
Vol 215-216 ◽  
pp. 664-668
Author(s):  
Yong Xiang Gao
Keyword(s):  
Reverse Engineering ◽  
Surface Reconstruction ◽  
Coordinate Measuring Machine ◽  
Numerical Control ◽  
Engineering Technology ◽  
Numerical Control Machining ◽  
Modeling Environment ◽  
Data Points ◽  
Measuring Machine ◽  
Rearview Mirror

The Reverse Engineering Technology (RET) is extensively employed in the realm of product designing. In this paper, a Three-coordinate Measuring Machine is utilized first to measure the data points of the rearview mirror of a motorcycle, then under UG modeling environment, surface reconstruction is conducted, and lastly procedures like mold splitting and mold core machining are finished upon exercising the Moldwizard Module of UG software. In short, the application of the RET greatly shortened the period of product designing and manufacturing.

Reconstruction Technology on the Surface of Engine Port Based on Reverse Engineering

2011 ◽  
Vol 219-220 ◽  
pp. 1249-1252
Author(s):  
Xiao Zhong Ren ◽  
Ming De Duan ◽  
Jian Xin Su
Keyword(s):  
Reverse Engineering ◽  
Laser Scanner ◽  
Grid Method ◽  
Free Form ◽  
Engineering Technology ◽  
Surface Data ◽  
Fitting Algorithm ◽  
Data Points ◽  
Free Form Surfaces ◽  
Developing Platform

Applying reverse engineering technology to the design of engine port, the reconstruction technology on the free-form surfaces of the engine port were investigated deeply. The data on the 3D surfaces of the engine port sample were collected by means of laser scanner, and the scattered data points were processed in regularization. Triangulation processing of surface data cloud was carried out based on surface grid method. According to the free-form surface technology and curve fitting algorithm used at present, the methods used to reconstruct the port surface were proposed. Taking CATIA software as developing platform, the free-form surfaces of the engine port were reconstructed.

Application of Reverse Engineering Technology in Constructing Prototype Surface

2010 ◽  
Vol 34-35 ◽  
pp. 1154-1158 ◽  
Author(s):  
Dong Man Yu ◽  
Xiao Jing Li ◽  
Yi Xiong ◽  
Zhi Hua Gao
Keyword(s):  
Reverse Engineering ◽  
Three Dimensional ◽  
Measurement Data ◽  
Coordinate Measuring Machine ◽  
Physical Object ◽  
Noise Elimination ◽  
Engineering Technology ◽  
Measuring Machine ◽  
Processing Of Measurement Data ◽  
Three Dimensional Coordinate

Reverse engineering (RE) plays an important role in accelerating product research and borrowing ideals from other manufacturers. This paper describes the whole RE process from origin point acquisition to data processing for better point quality. Based on RE system of a toy prototype, a fine surface reconstruction module is developed. Measurement data are acquired by scanning the physical object using three-dimensional coordinate measuring machine (CMM) and an optical scanning device. After the establishment of the model, data process for prototype, includes noise elimination, data interpolation, data smoothing, data filtering, data splicing and surface reconstructing, are conducted subsequently. Through processing of measurement data, the authors succeed in creating a CAD model and fabrication of the product in stereo lithography apparatus (SLA) machine.

Fitting Weighted Total Least-Squares Planes and Parallel Planes to Support Tolerancing Standards

2012 ◽  
Author(s):  
Craig M. Shakarji ◽  
Vijay Srinivasan
Keyword(s):  
Least Squares ◽  
Point Contact ◽  
Coordinate Measuring Machine ◽  
Total Least Squares ◽  
Point Sampling ◽  
Least Squares Fitting ◽  
Weighted Total Least Squares ◽  
Measuring Machine ◽  
Fitting In ◽  
Value Decomposition

We present elegant algorithms for fitting a plane, two parallel planes (corresponding to a slot or a slab) or many parallel planes in a total (orthogonal) least-squares sense to coordinate data that is weighted. Each of these problems is reduced to a simple 3×3 matrix eigenvalue/eigenvector problem or an equivalent singular value decomposition problem, which can be solved using reliable and readily available commercial software. These methods were numerically verified by comparing them with brute-force minimization searches. We demonstrate the need for such weighted total least-squares fitting in coordinate metrology to support new and emerging tolerancing standards, for instance, ISO 14405-1:2010. The widespread practice of unweighted fitting works well enough when point sampling is controlled and can be made uniform (e.g., using a discrete point contact Coordinate Measuring Machine). However, we demonstrate that nonuniformly sampled points (arising from many new measurement technologies) coupled with unweighted least-squares fitting can lead to erroneous results. When needed, the algorithms presented also solve the unweighted cases simply by assigning the value one to each weight. We additionally prove convergence from the discrete to continuous cases of least-squares fitting as the point sampling becomes dense.

Towards Combining Digitization Techniques in the Generation of Reverse Engineering Data Sets

1999 ◽  
Author(s):  
C. J. Rolls ◽  
W. ElMaraghy ◽  
H. ElMaraghy
Keyword(s):  
Reverse Engineering ◽  
Computer Aided Design ◽  
Laser Scanning ◽  
Single Point ◽  
Laser Scanner ◽  
Coordinate Measuring Machine ◽  
Industrial Applications ◽  
Data Sets ◽  
Error Characterization ◽  
Measuring Machine

Abstract Reverse engineering (RE), may be defined as the process of generating computer aided design models (CAD) from existing or prototype parts. The process has been used for many years in industry. It has markedly increased in implementation in the past few years, primarily due to the introduction of rapid part digitization technologies. Current industrial applications include CAD model construction from artisan geometry, such as in automotive body styling, the generation of custom fits to human surfaces, and quality control. This paper summarizes the principles of operation behind many commercially available part digitization technologies, and discusses techniques involved in part digitization using a coordinate measuring machine (CMM) and laser scanner. An overall error characterization of the laser scanning digitization process is presented for a particular scanner. This is followed by a discussion of the merits and considerations involved in generating combined data sets with characteristics indicative of the design intent of specific part features. Issues in facilitating the assembly, or registration, of the different types of data into a single point set are discussed.

scholarly journals A GC2 Joining Procedure for B-Spline Patches in Reverse Engineering

1997 ◽  
Author(s):  
Tachung Yang ◽  
Cheng-Chung Wang
Keyword(s):  
Reverse Engineering ◽  
Coordinate Measuring Machine ◽  
Surface Patch ◽  
Geometric Continuity ◽  
Huge Amount ◽  
B Spline ◽  
Surface Patches ◽  
Spline Surface ◽  
Surface Models ◽  
Measuring Machine

Reconstruction of surface models is a vital part in reverse engineering. Because of the huge amount of data from Coordinate Measuring Machine (CMM), processes for division of data into groups, surface patch reconstruction, and patch joining are inevitable in the CAD systems tailored for reverse engineering applications. Existing techniques of surface patch joining have the disadvantages, such as computational complication or lack of desired geometric continuity. A GC2 joining technique for B-spline surface patches by utilising a Bezier patch joining technique was proposed in this paper. This method possesses the merits in which only the control vertices near the joining boundaries of patches are modified and no additional blending surfaces at the joints of patches are created.

Experimental Performance Study of Industrial-Grade Coordinate Measuring Machines Using a Calibrated Production Workpiece

2014 ◽  
Vol 613 ◽  
pp. 118-124
Author(s):  
Crhistian Raffaelo Baldo ◽  
Gustavo Daniel Donatelli
Keyword(s):  
Coordinate Measuring Machine ◽  
Coordinate Measuring Machines ◽  
Performance Study ◽  
Experimental Performance ◽  
Measurement Strategy ◽  
Industrial Grade ◽  
Data Points ◽  
Good Measurement ◽  
Measuring Machine ◽  
Measurement Practices

The measurement of a part on a coordinate measuring machine may be affected by many factors such as machine frame accuracy, probe configuration, measuring environment, and measurement strategy. In order to understand the effect of some of those factors on measurements performed in industrial-grade machines, a master production workpiece has been chosen and circulated in Brazilian industries for collecting data points of the calibrated workpiece features according to a predefined master measuring protocol. Conclusions could be drawn about the behavior of each machine under varying conditions, measurement divergences from similar machines operating under distinct conditions, the complexity of measurements with CMMs, and the need for good measurement practices in the productive sector.

Reverse Design of the Card Buckle Based on Imageware

2015 ◽  
Vol 713-715 ◽  
pp. 291-294
Author(s):  
Shi Gang Wang ◽  
Fan Song Meng ◽  
Yue Han
Keyword(s):  
Image Processing ◽  
Reverse Engineering ◽  
3D Model ◽  
Processing System ◽  
Practical Application ◽  
Engineering Technology ◽  
Development Cycle ◽  
Computer Image Processing ◽  
Critical Technology ◽  
Product Development Cycle

Using reverse engineering technology software, Imageware and UG, and taking the card buckle as a prototype for the practical application of reverse engineering, this article discusses the method of combining reverse engineering with rapid technology. Using optical system to collect images, and then through the computer image processing technology to extract edge contour digital points, using the existing CAD software processing system for the reconstruction of 3D model, and taking a detail analysis of the critical technology of surface reconstruction, using rapid prototyping technology for processing molding, so as to improve the efficiency of product design, shorten the product development cycle. And at last, through the test, we get some usual problems and solve them one by one.

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