scholarly journals Bio-CAD Reverse Engineering of Free-form Surfaces by Planar Contours

2011 ◽  
Vol 8 (1) ◽  
pp. 37-42 ◽  
Author(s):  
Hacene Ameddah ◽  
Mekki Assas
Keyword(s):  
Reverse Engineering ◽  
Free Form ◽  
Free Form Surfaces

A study of a reverse engineering system based on vision sensor for free-form surfaces

2001 ◽  
Vol 40 (3) ◽  
pp. 215-227 ◽  
Author(s):  
Lai Xinmin ◽  
Lin Zhongqin ◽  
Huang tian ◽  
Zeng Ziping
Keyword(s):  
Reverse Engineering ◽  
Free Form ◽  
Engineering System ◽  
Vision Sensor ◽  
Free Form Surfaces

scholarly journals Reverse Engineering of Free-Form Surface Based on the Closed-Loop Theory

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Xue Ming He ◽  
Jun Fei He ◽  
Mei Ping Wu ◽  
Rong Zhang ◽  
Xiao Gang Ji
Keyword(s):  
Reverse Engineering ◽  
Point Cloud ◽  
Closed Loop ◽  
Free Form ◽  
Surface Model ◽  
Accurate Model ◽  
Check Points ◽  
Adaptive Measurement ◽  
Free Form Surface ◽  
Free Form Surfaces

To seek better methods of measurement and more accurate model of reconstruction in the field of reverse engineering has been the focus of researchers. Based on this, a new method of adaptive measurement, real-time reconstruction, and online evaluation of free-form surface was presented in this paper. The coordinates and vectors of the prediction points are calculated according to a Bézier curve which is fitted by measured points. Final measured point cloud distribution is in agreement with the geometric characteristics of the free-form surfaces. Fitting the point cloud to a surface model by the nonuniform B-spline method, extracting some check points from the surface models based on grids and a feature on the surface, review the location of these check points on the surface with CMM and evaluate the model, and then update the surface model to meet the accuracy. Integrated measurement, reconstruction, and evaluation, with the closed-loop reverse process, established an accurate model. The results of example show that the measuring points are distributed over the surface according to curvature, and the reconstruction model can be completely expressed with micron level. Meanwhile, measurement, reconstruction and evaluation are integrated in forms of closed-loop reverse system.

Reverse engineering of free-form surfaces

1998 ◽  
Vol 76 (1-3) ◽  
pp. 128-132 ◽  
Author(s):  
A Werner ◽  
K Skalski ◽  
S Piszczatowski ◽  
W Święszkowski ◽  
Z Lechniak
Keyword(s):  
Reverse Engineering ◽  
Free Form ◽  
Free Form Surfaces

A Method for Qualifying High Density Data Acquisition Systems for Free Form Metrology

1999 ◽  
Author(s):  
Sam E. Ebenstein ◽  
Vijitha S. Kiridena ◽  
Yelena M. Rodin ◽  
Gregory H. Smith
Keyword(s):  
Reverse Engineering ◽  
High Speed ◽  
Design Research ◽  
Graphical Representation ◽  
Least Square ◽  
Free Form ◽  
Evaluation Procedure ◽  
Safety Research ◽  
Ideal Sphere ◽  
Free Form Surfaces

Abstract The Vehicle Perception Safety Research Team of the Ford Manufacturing & Vehicle Design Research Laboratory has developed artifacts, procedures and data analysis techniques to assist in evaluating systems used for the high-speed collection of geometric data. These systems are usually comprised of a non-contact sensor and a means of positioning the sensor relative to the part being inspected. They are usually used to collect data from sculptured or “free form” surfaces for reverse engineering or for applications in the emerging field of free form metrology. The evaluation procedure consists of acquiring data from three ceramic balls nominally 44.45 mm in diameter held by depressions in a flat plate. The data are then first analyzed using least square techniques to obtain observed radii of the balls and the location of their centers. Then free form metrology techniques are used to compare the data from each ball to an ideal sphere of the observed radius and center location. By combining the observed location and radii with a high resolution graphical representation of the quality of fit between the data and an ideal sphere, a good assessment of the system’s capability for collection of data for reverse engineering or for free form metrology is obtained. At the same time the technique graphically reveals any troublesome systematic or shape-related sources of error.

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