Combination of a Vision System and a Coordinate Measuring Machine for the Reverse Engineering of Freeform Surfaces

2001 ◽  
Vol 17 (4) ◽  
pp. 263-271 ◽  
Author(s):  
V. Carbone ◽  
M. Carocci ◽  
E. Savio ◽  
G. Sansoni ◽  
L. De Chiffre
Keyword(s):  
Reverse Engineering ◽  
Vision System ◽  
Coordinate Measuring Machine ◽  
Freeform Surfaces ◽  
Measuring Machine

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.

Practical Measurement Strategies for Verification of Freeform Surfaces Using Coordinate Measuring Machines

2011 ◽  
Vol 18 (2) ◽  
pp. 209-222 ◽  
Author(s):  
G. Rajamohan ◽  
M. Shunmugam ◽  
G. Samuel
Keyword(s):  
Coordinate Measuring Machine ◽  
Coordinate Measuring Machines ◽  
Design Specification ◽  
Freeform Surfaces ◽  
B Splines ◽  
Measuring Machine ◽  
Machining Operations ◽  
Measurement Strategies ◽  
New Strategies ◽  
Practical Measurement

Practical Measurement Strategies for Verification of Freeform Surfaces Using Coordinate Measuring MachinesFreeform surfaces have wider engineering applications. Designers use B-splines, Non-Uniform Rational B-splines, etc. to represent the freeform surfaces in CAD, while the manufacturers employ machines with controllers based on approximating functions or splines. Different errors also creep in during machining operations. Therefore the manufactured freeform surfaces have to be verified for conformance to design specification. Different points on the surface are probed using a coordinate measuring machine and substitute geometry of surface established from the measured points is compared with the design surface. The sampling points are distributed according to different strategies. In the present work, two new strategies of distributing the points on the basis of uniform surface area and dominant points are proposed, considering the geometrical nature of the surfaces. Metrological aspects such as probe contact and margins to be provided along the sides have also been included. The results are discussed in terms of deviation between measured points and substitute surface as well as between design and substitute surfaces, and compared with those obtained with the methods reported in the literature.

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.

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.

Experimental Investigation of Wing Accuracy Quantification using Point Cloud and Surface Deviation

2021 ◽  
Vol 4 (2) ◽  
pp. 13-20
Author(s):  
Mehmood Ahmad ◽  
Sheharyar Nasir ◽  
Zia Ur Rahman ◽  
Shuaib Salamat ◽  
Umar Sajjad ◽  
...  
Keyword(s):  
Reverse Engineering ◽  
Data Acquisition ◽  
Laser Scanning ◽  
Coordinate Measuring Machine ◽  
Surface Generation ◽  
Free Form ◽  
Cad Model ◽  
3D Cad ◽  
Deviation Analysis ◽  
Measuring Machine

A rapidly advancing lean production industry demands quick manufacturing solutions with greater precision and accuracy. This paper proposes a framework for the accurate quantification of a die-casted wing using laser scanning and reverse engineering technique. In this technique, the wing upper and lower surfaces are scanned using a Coordinate Measuring Machine (CMM). This scanned data is then imported into CAD software to generate the surface using Free Form Reverse Engineering (FFRE). The model fitness test patronizes the curve fitting used for the surface generation. The generated surface and the original 3D CAD model are investigated using deviation analysis for inaccuracies originating due to manufacturing and data acquisition. The wing is further analyzed by the point data to 3D CAD model deviation analysis. The methodology adopted significantly minimizes the data acquisition and data processing error allowing deviation to be solely traced back to the manufacturing technique.

The Use of a Machine Vision System in a Flexible Manufacturing Cell Incorporating an Automated Coordinate Measuring Machine

1993 ◽  
Vol 207 (3) ◽  
pp. 199-204 ◽  
Author(s):  
X J Wang ◽  
C Butler
Keyword(s):  
Machine Vision ◽  
Flexible Manufacturing ◽  
Computer Aided Design ◽  
Manufacturing System ◽  
Vision System ◽  
Coordinate Measuring Machine ◽  
Cad System ◽  
Measuring Machine ◽  
Processing Techniques ◽  
Aided Design

The aim of this paper is to present a practical approach to the solution of problems associated with using an automated coordinate measuring machine (CMM) in a flexible manufacturing system (FMS) environment. The approach described uses machine vision and image processing techniques to permit transformations of the coordinate systems. In order to achieve flexible inspection, the system can recognize different workpieces by a quick matching method. The actual measuring path for the workpiece is derived from the original measuring path templates to allow for a workpiece to be measured in an arbitrary orientation on the table of the CMM. The original measuring path can be generated off-line by self-teach programming or from a computer aided design (CAD) system. The generation of the actual measuring path of the CMM is not limited by the complexity of the original off-line measuring path.

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.

Sign in / Sign up

Export Citation Format

Share Document