Evaluation of the Operational Parameters of Ropes

2011 ◽  
Vol 177 ◽  
pp. 125-134 ◽  
Author(s):  
Andrzej Sioma ◽  
Andrzej Tytko
Keyword(s):  
3D Model ◽  
Surface Defects ◽  
Vision System ◽  
Three Dimensional ◽  
Operational Parameters ◽  
Three Dimensional Model ◽  
Height Profile ◽  
3D Vision ◽  
Inspection Tasks

This paper discusses a visual method of measuring the geometric parameters of ropes and evaluating their wear based on measurements of a three-dimensional rope model. The 3D model is created using the method of laser triangulation. Selection of appropriate geometry of camera and laser lighting arrangement allows collection of the height profile of the observed rope surface in the selected cross-section and, subsequently, building of a 3D model. The resulting model is a representation of the actual dimensions of the rope and allows determination of the parameters describing its basic geometric dimensions and condition of rope surface. Determination of those values and parameters allows estimation of the degree of rope wear. The article discusses issues related to resolution of the vision system, resolution of laser beam analysis, and resolution relating to the measurement of the height profile on the surface of the rope. Based on the model constructed in such a way, measurements are presented in order to assess the dimensional parameters and surface defects in sample rope structures. Based on tests and analyses of the three-dimensional model, a range of inspection tasks using 3D vision systems is indicated.

Application of a Visual Measurement Technique to the Assessment of Electrodynamic Stamping

2011 ◽  
Vol 177 ◽  
pp. 1-9 ◽  
Author(s):  
Józef Bednarczyk ◽  
Andrzej Sioma
Keyword(s):  
Vision System ◽  
Three Dimensional ◽  
Three Dimensional Model ◽  
3D Vision ◽  
Visual Measurement ◽  
Low Profile ◽  
Beam Analysis ◽  
Dimensional Parameters ◽  
Inspection Tasks ◽  
Unconventional Machining

This paper discusses a visual method of measuring the geometric parameters of elements produced by electrodynamic stamping. This paper presents also electrodynamic method which is an unconventional machining technology, which complements the capabilities of traditional technologies, in particular as regards the formation of metal elements with low-profile dies of complex shape. The article discusses issues related to resolution of the vision system, resolution of laser beam analysis, and resolution relating to the measurement of the height profile on the surface of the product. Based on the model constructed in such a way, measurements are presented in order to assess the dimensional parameters. Based on tests and analyses of the three-dimensional model, a range of inspection tasks using 3D vision systems is indicated.

Assessment of the Condition of Hoisting Ropes by Measuring their Geometric Parameters in a Three-Dimensional Image of their Surface / Metoda Oceny Stanu Lin Wyciągowych Poprzez Pomiar Parametrów Geometrycznych Na Trójwymiarowym Obrazie Ich Powierzchni

2013 ◽  
Vol 58 (3) ◽  
pp. 643-654 ◽  
Author(s):  
Grzegorz Olszyna ◽  
Andrzej Sioma ◽  
Andrzej Tytko
Keyword(s):  
Surface Defects ◽  
Vision System ◽  
Surface Condition ◽  
Three Dimensional ◽  
Mining Industry ◽  
Geometric Parameters ◽  
Visual Methods ◽  
3D Vision ◽  
Dimensional Image ◽  
Inspection Tasks

Abstract This article discusses a vision method of measuring the geometric parameters of ropes and evaluating their wear based on measurements made in a three-dimensional projection of rope surface. The purposes of this method include assessment of the condition of all kinds of ropes working in the mining industry. The proposed method is novel, eliminates the shortcomings of previously used mandatory visual methods, removes their constraints, and is an important complement to magnetic methods. The article discusses the method of construction of a three-dimensional image based on mapping of the actual dimensions of the rope and on algorithms that allow determination of the parameters describing its basic geometrical dimensions and surface condition. The article discusses issues related to resolution of the vision system, resolution of laser beam analysis, and resolution relating to the measurement of the height profile on the surface of the rope. Based on the image constructed in such a way, measurements are presented in order to assess the dimensional parameters and surface defects in sample rope structures. Based on tests and analyses of the three-dimensional image, a range of inspection tasks using 3D vision systems is indicated.

Investigations of The Hybrid Effects of The Operational Parameters In The Radial Forging Process Based On The Validation of The Hardness Test

2022 ◽  
Author(s):  
Saeed Darki ◽  
Evgeniy Yurevich Raskatov
Keyword(s):  
Effective Strain ◽  
Three Dimensional ◽  
Hardness Test ◽  
Radial Forging ◽  
Operational Parameters ◽  
Three Dimensional Model ◽  
Temperature Changes ◽  
Forging Process ◽  
Specimen Tube ◽  
Radial Forging Process

Abstract In this study, considering all the parameters in radial forging and a three-dimensional model has been simulated using the finite element method. By implementing an elastoplastic state for the specimen tube, parameters such as friction type, residual stress distribution, effective strain distribution, material flow velocity and its effect on the neutral plate and the distribution of force in the die have been studied and analyzed. The effects of angle on the quality and characteristics of the specimen and the longevity of the die have also been obtained. Experimental results have been used to confirm the accuracy of the simulation. The results of the hardness test after forging were compared with the simulation results. Good agreement between the results indicates the accuracy of the simulation in terms of hardness. Therefore, this validation allows confirming the other obtained results for the analysis and prediction of various components in the forging process. After the validation and confirmation of the results through the hardness test, the hardness distribution was obtained by considering temperature changes and the effective strain on the specimen.

Design and Implementation of a Stereoscopic Video Player for a Time-Division Display

2014 ◽  
Vol 577 ◽  
pp. 1008-1011
Author(s):  
Chao Hui Lü ◽  
Jia Ying Pan ◽  
Chen Zhang ◽  
Hui Ren
Keyword(s):  
Depth Perception ◽  
Vision System ◽  
Three Dimensional ◽  
Video Technology ◽  
Stereoscopic Video ◽  
3D Vision ◽  
Design And Implementation ◽  
Video Player ◽  
Time Division

Three-dimensional video technology is becoming more and more popular, because it can provide a better natural depth perception. In this paper, a stereoscopic video player for a time-division display is designed and implemented, and people can use 3D Shutter Glasses to watch stereoscopic video by the player. It mainly focuses on the process of designing a Direct3D application, and the special handling of NVIDIA 3D Vision system for stereoscopic video. Upon examination, the stereoscopic video player can provide stereoscopic perception and good immersive experience.

An active three-dimensional vision system for automated detection and measurement of surface defects

2014 ◽  
Vol 228 (12) ◽  
pp. 1543-1549 ◽  
Author(s):  
Philips S Ogun ◽  
Matthew R Chamberlain ◽  
Punnu L Phairatt ◽  
Mitulkumar J Tailor ◽  
Michael R Jackson
Keyword(s):  
Surface Defects ◽  
Vision System ◽  
Three Dimensional ◽  
Automated Detection ◽  
Three Dimensional Vision

Conjugate Flow and Heat Transfer Investigation of a Turbo Charger: Part I — Numerical Results

2003 ◽  
Author(s):  
Dieter Bohn ◽  
Tom Heuer ◽  
Karsten Kusterer
Keyword(s):  
Heat Transfer ◽  
Three Dimensional ◽  
Heat Fluxes ◽  
Inlet Temperature ◽  
Three Dimensional Model ◽  
Flow And Heat Transfer ◽  
Turbine Inlet ◽  
Turbo Charger ◽  
Conjugate Calculation

In this paper a three-dimensional conjugate calculation has been performed for a passenger car turbo charger. The scope of this work is to investigate the heat fluxes in the radial compressor which can be strongly influenced by the hot turbine. As a result of this, the compressor efficiency may deteriorate. Consequently, the heat fluxes have to be taken into account for the determination of the efficiency. To overcome this problem a complex three-dimensional model has been developed. It contains the compressor, the oil cooled center housing, and the turbine. 12 operating points have been numerically simulated composed of three different turbine inlet temperatures and four different mass flows. The boundary conditions for the flow and for the outer casing were derived from experimental test data (part II of the paper). Resulting from these conjugate calculations various one-dimensional calculation specifications have been developed. They describe the heat transfer phenomena inside the compressor with the help of a Nusselt number which is a function of an artificial Reynolds number and the turbine inlet temperature.

Numerical modelling of a microreactor for thermocatalytic decomposition of toxic compounds

2011 ◽  
Vol 32 (3) ◽  
pp. 215-227 ◽  
Author(s):  
Paweł Jóźwik ◽  
Michał Karcz ◽  
Janusz Badur
Keyword(s):  
Numerical Modelling ◽  
Knudsen Diffusion ◽  
Three Dimensional ◽  
Operating Conditions ◽  
Three Dimensional Model ◽  
Toxic Compounds ◽  
Slip Boundary ◽  
Standard Models ◽  
Thermocatalytic Decomposition

Numerical modelling of a microreactor for thermocatalytic decomposition of toxic compounds In this paper a three-dimensional model for determination of a microreactor's length is presented and discussed. The reaction of thermocatalytic decomposition has been implemented on the base of experimental data. Simplified Reynolds-Maxwell formula for the slip velocity boundary condition has been analysed and validated. The influence of the Knudsen diffusion on the microreactor's performance has also been verified. It was revealed that with a given operating conditions and a given geometry of the microreactor, there is no need for application of slip boundary conditions and the Knudsen diffusion in further analysis. It has also been shown that the microreactor's length could be practically estimated using standard models.

Intelligent Identification and Locating System of Steel Coil Based on Laser Technology

2014 ◽  
Vol 496-500 ◽  
pp. 1308-1312
Author(s):  
Yu Chi Wang ◽  
Si Yue Zhou ◽  
Zheng Peng Yuan
Keyword(s):  
3D Model ◽  
Three Dimensional ◽  
Least Square Method ◽  
Least Square ◽  
Circle Fitting ◽  
Three Dimensional Model ◽  
Laser Technology ◽  
Steel Coil ◽  
Main Emphasis ◽  
Locating System

In this paper, a solution based on laser technology is proposed for steel coil handling. The main emphasis is placed on the problem of steel coil identification and locating. In this paper, we first use laser data to construct three dimensional model of the worksite. And then we slice up the 3D model repeatedly to get the section images and make them to fusion. In order to wipe off the disturb of line, a line detection method based on probabilistic hough transform is proposed. Finally an improved least square method used in circle fitting is discussed.

scholarly journals Generation of Novel-Substrate-Accepting Biphenyl Dioxygenases through Segmental Random Mutagenesis and Identification of Residues Involved in Enzyme Specificity

2006 ◽  
Vol 72 (3) ◽  
pp. 2191-2199 ◽  
Author(s):  
Marco Zielinski ◽  
Silke Kahl ◽  
Christine Standfuß-Gabisch ◽  
Beatriz Cámara ◽  
Michael Seeger ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Random Mutagenesis ◽  
Major Influence ◽  
Enzyme Specificity ◽  
Three Dimensional Model ◽  
Wild Type Enzyme ◽  
High Frequencies ◽  
Burkholderia Xenovorans ◽  
Function Relationship

ABSTRACT Aryl-hydroxylating dioxygenases are of interest for the degradation of persistant aromatic pollutants, such as polychlorobiphenyls (PCBs), or as catalysts for the functionalization of aromatic scaffolds. In order to achieve dioxygenation of technical mixtures of PCBs, enzymes with broadened or altered substrate ranges are essential. To alter the substrate specificity of the biphenyl dioxygenase (BphA) of Burkholderia xenovorans LB400, we applied a directed evolution approach that used structure-function relationship data to target random mutageneses to specific segments of the enzyme. The limitation of random amino acid (AA) substitutions to regions that are critical for substrate binding and the exclusion of AA exchanges from positions that are essential for catalytic activity yielded enzyme variants of interest at comparatively high frequencies. After only a single mutagenic cycle, 10 beneficial variants were detected in a library of fewer than 1,000 active enzymes. Compared to the parental BphA, they showed between 5- and 200-fold increased turnover of chlorinated biphenyls, with substituent patterns that rendered them largely recalcitrant to attack by BphA-LB400. Determination of their sequences identified AAs that prevent the acceptance of specific PCBs by the wild-type enzyme, such as Pro334 and Phe384. The results suggest prime targets for subsequent cycles of BphA modification. Correlations with a three-dimensional model of the enzyme indicated that most of the exchanges with major influence on substrate turnover do not involve pocket-lining residues and had not been predictable through structural modeling.

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