On-line free form surface measurement via a fuzzy-logic controlled scanning probe

ARTICLE INFO ABSTRACTArticle history:Over the past several years, many studies have been carried out in the field of 3D data inspection systems. Several attempts have been made to improve the quality of manufactured parts. The introduction of laser sensors for inspection has made it possible to acquire data at a remarkably high speed. In this paper, a robust inspection technique for detecting defects in 3D pressed parts using laser-scanned data is proposed. Point cloud data are segmented for the extraction of features. These segmented features are used for shape matching during the localization process. An iterative closest point (ICP) algorithm is used for the localization of the scanned model and CAD model. To achieve a higher accuracy rate, the ICP algorithm is modified and then used for matching. To enhance the speed of the matching process, aKd-tree algorithm is used. Then, the deviation of the scanned points from the CAD model is computed.

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Section: 서 론unclassified

Development of An Inspection Method for Defect Detection on the Surface of Automotive Parts

Park

Tuladhar²,

Shin³

2013

Journal of manufacturing engineering & technology

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“…Non-contact methods use scanning-type CMMs to capture larger numbers of sampling points, and have been used successfully for measuring surface form (Bradley and Vickers, 1992;Lee et al, 2001;Chang and Lin, 1999). A recent study comprising questionnaire respondents from research institutions and companies engaged in surface topography in the European Community, revealed that non-contact optical techniques are more popular and widely used than previously thought (Dong et al, 1994).…”

Section: Nonmentioning

confidence: 99%

Dimensional Measurement for Dentistry

Rafeek¹,

Seymour²,

Zou³

2012

Modern Metrology Concerns

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“…The main advantage of this method is that, for a given accuracy, the complexity of the surface is lower than a traditional method, and the computations are quite the same than those obtained when using traditional surface modelling algorithms. Chang and Lin [ 28 ] presented a system and methodology for on-line free form surface measurement via a scanning contact probe installed on a CNC machine. To improve the measuring stability and continuity, FL control, in lieu of traditional PID control, is employed.…”

Section: Introductionmentioning

confidence: 99%

Pre-Processing of Point-Data from Contact and Optical 3D Digitization Sensors

Budak

Vukelić

Bračun

et al. 2012

Sensors

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Contemporary 3D digitization systems employed by reverse engineering (RE) feature ever-growing scanning speeds with the ability to generate large quantity of points in a unit of time. Although advantageous for the quality and efficiency of RE modelling, the huge number of point datas can turn into a serious practical problem, later on, when the CAD model is generated. In addition, 3D digitization processes are very often plagued by measuring errors, which can be attributed to the very nature of measuring systems, various characteristics of the digitized objects and subjective errors by the operator, which also contribute to problems in the CAD model generation process. This paper presents an integral system for the pre-processing of point data, i.e., filtering, smoothing and reduction, based on a cross-sectional RE approach. In the course of the proposed system development, major emphasis was placed on the module for point data reduction, which was designed according to a novel approach with integrated deviation analysis and fuzzy logic reasoning. The developed system was verified through its application on three case studies, on point data from objects of versatile geometries obtained by contact and laser 3D digitization systems. The obtained results demonstrate the effectiveness of the system.

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On-line free form surface measurement via a fuzzy-logic controlled scanning probe

Cited by 19 publications

References 11 publications

Development of An Inspection Method for Defect Detection on the Surface of Automotive Parts

Development of An Inspection Method for Defect Detection on the Surface of Automotive Parts

Dimensional Measurement for Dentistry

Pre-Processing of Point-Data from Contact and Optical 3D Digitization Sensors

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