Accuracy analysis of 3D data collection and free-form modelling methods

Bardell, R; Balendran, V.; Sivayoganathan, K.

doi:10.1016/s0924-0136(02)00212-1

Cited by 23 publications

(13 citation statements)

References 4 publications

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“…The model alignment between the digital and the physical model was made using the 'best-fit process' (Sourlier 1995;Weckenmann et al 1998;Bardell et al 2003), which minimises the differences of 15 randomly selected points of the digital mandible. A 1-m touch probe was used and the results were analysed.…”

Section: Cad Model Accuracymentioning

confidence: 99%

The influence of data shape acquisition process and geometric accuracy of the mandible for numerical simulation

Relvas

Ramos

Completo

et al. 2011

Computer Methods in Biomechanics and Biomedical Engineering

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Computer-aided technologies have allowed new 3D modelling capabilities and engineering analyses based on experimental and numerical simulation. It has enormous potential for product development, such as biomedical instrumentation and implants. However, due to the complex shapes of anatomical structures, the accuracy of these technologies plays an important key role for adequate and accurate finite element analysis (FEA). The objective of this study was to determine the influence of the geometry variability between two digital models of a human model of the mandible. Two different shape acquisition techniques, CT scan and 3D laser scan, were assessed. A total of 130 points were controlled and the deviations between the measured points of the physical and 3D virtual models were assessed. The results of the FEA study showed a relative difference of 20% for the maximum displacement and 10% for the maximum strain between the two geometries.

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Section: Cad Model Accuracymentioning

confidence: 99%

The influence of data shape acquisition process and geometric accuracy of the mandible for numerical simulation

Relvas

Ramos

Completo

et al. 2011

Computer Methods in Biomechanics and Biomedical Engineering

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“…The created CAD model then can be modified further to get an optimal product design. This process has been defined as systematic evaluation of a product with the purpose of replication which involves either direct copies when no design/manufacturing documentation exists or enhancement of an existing design (Bardell et al, 2003;Chuang and Yau, 2005). Its eccentric nature presents solutions to multi-disciplinary problems hence characterizing the process proficiency for diverse applications.…”

Section: Reverse Engineeringmentioning

confidence: 99%

An integrated design approach for rapid product development

Ali

Chowdary

Gonzáles

2013

Journal of Engineering, Design and Technology

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Purpose -The purpose of this paper is to present an integrated design approach for rapid product development (RpD) of a broken product. Design/methodology/approach -Reverse engineering (RE), re-engineering (ReE) and RpD systems have been incorporated to infuse agile characteristics in the proposed design and development process. A case study involving a broken clutch shoe was selected to demonstrate the efficacy of the proposed integrated approach. Findings -Integration of RE, ReE and RpD presented an unconventional approach towards achieving reduced lead times for design and development of products. Agile characteristics have been manifested for the broken clutch shoe by retrieval of a digitized parametric computer aided design (CAD) model. Moreover, development and selection of an enhanced feasible design (M 3 ) as well as delivery of the corresponding prototype was accomplished just in one week. Originality/value -The proposed integrated approach for RpD can provide solutions to similar industrial situations wherein agility in the product design and development process can be infused so that the developed part can be delivered quickly to the customer at the reduced time and costs.

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“…An intelligent interface for computer aided design (CAD)-CMM [3] and an off-line interactive CMM [12] have been proposed. Free-form surfaces have been detected and the error has been calculated based on non-uniform rational B-spline curve (NURBS) and the CMM [2,[13][14][15].…”

Section: Introductionmentioning

confidence: 99%

T-Spline Based Unifying Registration Procedure for Free-Form Surface Workpieces in Intelligent CMM

Han

Wang

et al. 2017

Applied Sciences

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Abstract:With the development of the modern manufacturing industry, the free-form surface is widely used in various fields, and the automatic detection of a free-form surface is an important function of future intelligent three-coordinate measuring machines (CMMs). To improve the intelligence of CMMs, a new visual system is designed based on the characteristics of CMMs. A unified model of the free-form surface is proposed based on T-splines. A discretization method of the T-spline surface formula model is proposed. Under this discretization, the position and orientation of the workpiece would be recognized by point cloud registration. A high accuracy evaluation method is proposed between the measured point cloud and the T-spline surface formula. The experimental results demonstrate that the proposed method has the potential to realize the automatic detection of different free-form surfaces and improve the intelligence of CMMs.

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Accuracy analysis of 3D data collection and free-form modelling methods

Cited by 23 publications

References 4 publications

The influence of data shape acquisition process and geometric accuracy of the mandible for numerical simulation

The influence of data shape acquisition process and geometric accuracy of the mandible for numerical simulation

An integrated design approach for rapid product development

T-Spline Based Unifying Registration Procedure for Free-Form Surface Workpieces in Intelligent CMM

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