Bernhard G. Zagar
This paper addresses the problems arising in continuous film extrusion of thin foils that need to result in optical quality but due to process still not completely understood give suboptimal quality of the resultant foil. The foils show more or less severe chatter marks dependent on certain system parameters like feed rate of the product, temperature of the product casted, spinning rate and differential spinning rate of rolls, cooling rate and so on. An inline capable optical quality measurement system is devised that allows to continuously assess the product quality within seconds after the...
TC14 ISMQC 2007
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· 2007
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N. J. Vasa, I. A. Palani, Rajesh Kona, M. Singaperumal
The global increase in N2O and CO2 levels, which contribute to the greenhouse effect, has been attributed to combustion of biomass and fossil fuels. An optical sensor system capable of measuring concentrations of these species and O2 might be incorporated into combustion-control applications to reduce pollutant emissions and increase fuel efficiency. In addition to measuring the gases in the atmosphere and pollution from traffic and industry, it is important to monitor the work environment, industrial process. A compact, widely tunable coherent optical source based on a difference frequency...
TC14 ISMQC 2007
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· 2007
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T. S. Sriranga, R. Samuel, Raghunatha Behara, P. Radhakrishnan
Photogrammetry and Videogrammetry techniques are being applied for a variety of spacecraft structural applications including shape, dimensional stability and dynamic displacement measurements. Static object measurements serve to provide either shape or distortions in a statically loaded structure during qualification tests. Dynamic measurements are essential during motion measurement and determination of mode shape of flexible appendages and Synthetic Aperture Radar antenna panels. Configuration of a PC-based image measurement and processing system for motion measurements using two...
TC14 ISMQC 2007
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· 2007
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K. Ashokan, K. Ramesh
Digital Photoelasticity is an experimental method for determining stresses in 2D and 3D models. Recently Stereolithography, one of the Rapid Prototyping (RP) techniques, is being used widely to produce 3D photoelastic models of complicated shapes directly from Computer Aided Design (CAD) models. But with such models, the fringe data obtained is not continuous as in the case of conventional models. This is due to the porous nature of the stereolithography models attributed to the way in which the models are built. To address this issue, the use of various smoothing techniques is explored in...
TC14 ISMQC 2007
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· 2007
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Yu. V. Chugui, V. S. Bazin, A. G. Verkhogliad, S. V. Kalichkin, V. E. Kalikin, S. N. Makarov, S. G. Savkov
An opto-electronic measurement system for continuous monitoring of displacements and analysis of the friction pendulum bearings for the oil-drilling platforms is presented. Measuring principle of the system is based on target image formation by camera and digital image processing. The passive part of the system (optical target) is fixed on one part of construction while active part - a field measurement sensor (FMS) - is installed on another part of construction that moves relative to the first one. The system is certified as a measuring tool for the use in explosive environments.
TC14 ISMQC 2007
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· 2007
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A. M. Kovalev, Yu. V. Chugui, M. V. Stepanov, V. E. Lischenko
The stages of visual space forming in human mind are considered. Relationships between distances in Euclidean and hyperbolic visual spaces as well as in Klein and Poincare models have been found. A variant of anisotropic visual space is presented.
TC14 ISMQC 2007
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· 2007
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Muralidhara, S. Majumder, N. J. Vasa, M. Singaperumal
In the present work, a Micro EDM (Micro Electro Discharge Machine) is developed in-house with piezoactuated adaptive tool feed mechanism and investigations on Silicon wafer machining is carried out at different machining conditions and with copper and tungsten tool materials. Kerosene is used as the dielectric medium. The influence of the tool feed mechanism on the surface roughness is investigated with different feed back gap voltages and it was found that gap feed back voltage of 23V generates better surfaces when compared to lower feed back gap voltages. The effect of sparking frequency...
TC14 ISMQC 2007
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· 2007
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Kiyoshi Takamasu, Keisuke Yoshida, Tatsuya Senoo, Xin Chen, Kiyoshi Kotani, Satoru Takahashi
For high flexibility of assembly works, 6 DOF mechanisms are useful for supporting assembly workers. The 6 DOF mechanism needs to move in sub-mm and sub-degree absolute positioning accuracy over wide working area. For this purpose, we developed a novel 6 DOF parallel mechanism driven by 3 planar motors and a novel calibration method for this mechanism. The calibration experiments using CMM are performed and the results of the calibrations are evaluated.
TC14 ISMQC 2007
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· 2007
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Albert Weckenmann, J. Hoffmann
Today several coordinate measuring machines for the measurement of microparts have been developed, some of them are commercially available already. State of the art are axes resolutions of a few nanometers at a measuring volume of a few cm³, what can be achieved by laser interferometry or scale based length measuring systems. However, the most critical part of a conventional CMM, the usually tactile probing system, is difficult to be scaled down for the measurement of microparts. Due to the small contact area between a micro tip ball of e. g. 0.1 mm diameter and a workpiece, Hertzian stress...
TC14 ISMQC 2007
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S. Minamiguchi, S. Usuki, S. Takahashi, K. Takamasu
Since a thin resin film with thickness of several 10nm remains as a residual film between the imprinted patterns and the substrate in the nano-imprint lithography process, it should be eliminated by reactive ion etching. To implement the etching process with high accuracy and to maintain the original patterns for realizing NIL as a highly reliable lithography process of semiconductor, it is seriously necessary to measure the thickness of the residual resin film before the etching process. In this article, we proposed a novel optical measurement method for the residual film thickness based on...
TC14 ISMQC 2007
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· 2007
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