Identification and geometrical modelling of complex shape surfaces using coordinate measuring machine and CAD/CAM systems

Skalski, Konstanty; Filipowski, R.; Święszkowski, Wojciech; Kędzior, Krzysztof; Dąbrowski, A.; Zawora, J.

doi:10.1016/s0924-0136(97)00314-2

Cited by 8 publications

(5 citation statements)

References 2 publications

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“…The results of finite element analysis ( Figure 4 and Table III) proved that maximum local reduced von Mises stresses appearing in the polyethylene head do not exceed 26 MPa (for 688-N elbow loading) and are, therefore, less than the permissible stress for Chirulen (16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26)(27) MPa depending on the grade). The stresses exceeded 33 MPa only when the joint reaction force was about 918 N. However, this represents an extreme load condition almost impossible for a patient with an implanted prosthesis.…”

Section: Preclinical Study: Finite Element Methods Analysismentioning

confidence: 94%

“…1,3,14,28 Thus, the process of prosthetic design should be preceded by precise identification of the anatomic features of the RH. This can be performed by use of computed tomography (CT) 30 and a coordinate-measuring machine (CMM) 25 integrated with a computeraided design (CAD) system. 31 In designing the implant, proper materials should be chosen that ensure joint stability and allow for carrying adequate loads.…”

mentioning

confidence: 99%

“…31 In designing the implant, proper materials should be chosen that ensure joint stability and allow for carrying adequate loads. Following such guidelines and on the basis of experimental research, 25,30,31 we introduce a mobile/bipolar RH prosthesis. 13…”

mentioning

confidence: 99%

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Radial head prosthesis with a mobile head

Skalski

Święszkowski

Pomianowski

et al. 2004

Journal of Shoulder and Elbow Surgery

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Section: Preclinical Study: Finite Element Methods Analysismentioning

confidence: 94%

mentioning

confidence: 99%

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Radial head prosthesis with a mobile head

Skalski

Święszkowski

Pomianowski

et al. 2004

Journal of Shoulder and Elbow Surgery

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“…There exist several terms of automated inspection systems for complex surfaces using CMM. For example, [4 -7] refer to it as automated inspection planning; Kim and Kim [8] refer to it as CAD-directed measuring strategy; Ip and Loftus [9], refer to the system as the surface coordinate measurement method; Skalski et al [10] call it the scanning measurement technique; Hsieh et al [11], just refer to it as reverse engineering that uses CMM; [12] refer to it as CAD-model based inspection; [13] refer to it as computer integrated inspection system using CMM; [14] refer to it as an off-line measurement planning system for inspection automation, and there are several other terms. In general, the objectives may be divided into two categories:…”

Section: Research Backgroundmentioning

confidence: 99%

Complex Shape Measurement Using 3D Scanner

Rahmat

Ng²,

Sangaralingam³

2012

Jurnal Teknologi

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Sistem Pemeriksaan Automatik biasanya bermula dengan teknik Reka bentuk Berbantukan Komputer (CAD) dan berakhir dengan janaan arahan mesin untuk menukarkan bahan mentah kepada produk akhir, memperolehi data tiga dimensi untuk membina model permukaan berparameter bagi tujuan analisis ralat, duplikasi atau memperbaiki objek tersebut. Ia melibatkan pendigitalan permukaan objek yang perlu diperiksa, janaan model CAD dan analisis keputusan pemeriksaan. Pendigitalan boleh dilakukan dengan teknik kuar sentuh atau pengesan tanpa sentuh. Biasanya, tanpa bantuan daripada pengeluar, adalah sukar untuk memantau dan mengenal pasti perubahan produk selepas digunakan. Tambahan pula, reka bentuk cetakan asal tidak didedahkan. Objektif utama kertas ini ialah mencadangkan suatu algoritma yang mampu mengekstrak maklumat daripada objek berbentuk kompleks yang telah didigitalkan (dengan menggunakan pengimbas laser), misalnya cangkukan lutut, untuk menjanakan reka bentuk cetakannya. Diharapkan penyelidik lain, terutamanya dalam bidang perubatan dan bio-kejuruteraan mendapat manfaat daripada algoritma ini untuk meramal dan menganggar perubahan bekas cangkukan perubatan dan seterusnya mengubah reka bentuknya untuk memenuhi kehendak pesakit. Kata kunci: Pemeriksaan automatik, reka bentuk cetakan, cangkukan lutut, pengimbas 3D, gantian lutut total Automated inspection systems usually start from computer-aided design (CAD) techniques, and end with either generation of machining instructions required to convert a raw material into a finished product, or to obtain three-dimensional data for constructing a parametric surface model of the product for the purpose of error analysis, or to duplicate or enhance the object. It involves surface digitization of an existing part that needs inspection, CAD model creation and analyzing the inspection results. Most of the time, without the help from the manufacturer, it is very difficult to do inspection and to detect any changes of the product after being used. In addition, the original blueprints of most manufacturing products are not being revealed to the public. The main objective of this paper is to propose an algorithm that is able to extract information from digitized complex shape objects (using laser scanner), such as the medical knee implant (knee prosthesis), to generate their blueprint. It is hoped that other researchers, especially in the medical and bioengineering field, can benefit from this proposed algorithm to predict or approximate the changes of the medical ex-plant and modify its design to suit the patient needs. Key words: Automated inspection, blueprint, prosthesis, 3D scanner, total knee replacement

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“…The track of the probe centre of sphere is measured surface's equidistant surface in reality. Measure-ball radius compensation must be made to receive the actual measured surface [5,6]. The hinge of the probe's radius compensation is to make sure the surface normal vector in the contacted point.…”

Section: Prepared Work For Measuringmentioning

confidence: 99%

The Research on the Zero-Tooth-Difference Internal Gear Measuring Method

Wei

Fan

et al. 2012

AMM

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A variable gear measuring method was put forward in order to define the error of eccentricity of the zero-tooth-difference internal gear, which was based on the three-coordinate measuring machine. This method can scan the coordinate of tooth profile automatically and fleetly, then by calculating the difference of the tooth profile curve between the theory and reality, and achieving the measure on line about geared ring radial runout to define the error of eccentricity. The results of this experiment and theoretic analysis showed that the method which was putted forward has many advantages, like the density of sampling is big, the calculation is simple, the measure is accurate, and the human factors are very little.

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Identification and geometrical modelling of complex shape surfaces using coordinate measuring machine and CAD/CAM systems

Cited by 8 publications

References 2 publications

Radial head prosthesis with a mobile head

Radial head prosthesis with a mobile head

Complex Shape Measurement Using 3D Scanner

The Research on the Zero-Tooth-Difference Internal Gear Measuring Method

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