Yuri Chugui, Nikolai Yakovenko, Michael Yaluplin
Accuracy characterization of a Fresnel method for objects dimensions measurement in coherent and partially coherent light is investigated. The major sources of a systematic measurement error are estimated analytically including non-uniform illumination of the object, the interference effect of the diffraction object edge images, the integration properties of the linear multi-element photodetector, influence of extended size of partially coherent light source. Effective algorithms for account of basic error components and for increase accuracy in low measuring range are proposed. The obtained...
XVIII IMEKO World Congress
· TC14
· 2006
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Andrea Magalini, David Vetturi
Straightness measurements for the geometrical inspection of machining tools have been operated in a weakly controlled environment (concerning temperature, pressure, humidity and induced mechanical vibrations) with reference to industrial manufacturing departments. Measurements have been performed by means of a Wollaston prism laser interferometer. A first experimental characterization of this instrumentation has been operated by repeatability tests conducted in controlled and not controlled environments, considering different relative positions for the interferometer and the laser head. Then...
XVIII IMEKO World Congress
· TC14
· 2006
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Alexandre Titov, Igor Malinovsky
Studies of a long gauge block Kösters interferometer, performed at INMETRO, and the results of the CIPM Key Comparison CCL-2 show that the uncertainty in realization of the SI length unit achieved with this type of instrument in the range of 500 mm is ~1 part in 108. Basic advances in philosophy and techniques of high-precision temperature measurements, realized in Brazil in the last few ears, permit to reduce crucially the uncertainty of length measurements by optical interferometry and to reach the Nanometrolgy regime in artifacts with nominal lengths above 100 mm. New measurement and...
XVIII IMEKO World Congress
· TC14
· 2006
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Olga B. Basun, Valery A. Granovsky, Mikhail D. Kudryavtsev
Precision angular scales are considered from common point of view, and principles of their construction are formulated. Methods of mutual calibration of circular scales are developed to meet these principles taking into account the redundancy factor. Multidimensional classification of the methods is proposed. The family of designs is constructed, and relations of procedure parameters of a scale carrier calibration with required accuracy of the procedure results is established.
XVIII IMEKO World Congress
· TC14
· 2006
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J. Sładek, R.Sitnik, M. Kupiec, P.Błaszczyk
In this article a new concept of a hybrid measurement method will be presented. The hybrid method is developed for fast and precise measurement especially for the automotive industry. It combines the high-speed of optical methods with the high-accuracy of CMMs measurement. A laboratory prototype of the system is described. Furthermore we present preliminary work on assessment of measurement uncertainty of the hybrid system based on the comparison of the results with CMM measurements.
XVIII IMEKO World Congress
· TC14
· 2006
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José Sánchez, Sergio Padilla, J.M. Dorador
The main purpose of this paper is to show advances on the concept of virtual coordinate machines, already developed for aiding calibrating and teaching tasks. It is now possible to operate these machines directly from CAD browsers. No matter how distorted are the machines, it is possible to perform the analysis.
XVIII IMEKO World Congress
· TC14
· 2006
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Yuri Chugui, Sergei Plotnikov, Anatoly Potashnikov, Alexander Verkhogliad
The novel results of the R & D activity of TDI SIE SB RAS in the field of the optical measuring technologies, as well as laser technologies for solving safety problems are presented. To measure the rocks stress and to prevent the mountain impact, as well as for basic investigations, a set of optical-electronic deformers and systems was developed and produced. For permanent noncontact bearing position inspection of oil-drilling platforms on Sakhalin coast (Russia) we have developed optical-electronic method and system SAKHALIN. Multifunctional laser technological system LSP-2000 equipped by...
XVIII IMEKO World Congress
· TC14
· 2006
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Flávia Pompéia, Luiz A. P. Gusmão, Carlos R. Hall Barbosa, Elisabeth Costa Monteiro, Lídice A. P. Gonsalves, Fernando L. A. Machado
A magnetic field transducer based on the giant magnetoimpedance (GMI) effect has been developed by the Laboratory of Biometrology at PUC-Rio. It is aimed at biomedical applications, especially three-dimensional localization of needles accidentally inserted in the human body. This manuscript presents some new measurements that led to a better understanding of the prototype’s behavior.
XVIII IMEKO World Congress
· TC13
· 2006
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Ireneusz Jabłoński, Janusz Mroczka
The paper presents the problems of modeling and measurements in the medical sciences in the context of a dynamical system theory. Modeling can be seen here not only by the optics of a concrete object – system of breathing control, but first of all by the features of the tools used during reality reconstruction, which directly transfer to measurement procedure. The article is an introduction to a given research area.
XVIII IMEKO World Congress
· TC13
· 2006
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Ireneusz Jablonski, Janusz Mroczka
In the paper, there are postulated the basic requirements for the effective modification of a standard scheme of the interrupter technique (IT). The new method dedicated to respiration mechanics measurements, which meets such assumptions, is called enhanced interrupter technique (EIT). Using the idea of indirect measurements, it was showed by computer simulations the possibility to estimate the more number of parameters in EIT than in IT (only airway resistance R aw ) for the proposed, modified Dubois’ model. EIT gives the higher accuracy and the reduced dispersion of the measurement...
XVIII IMEKO World Congress
· TC13
· 2006
· Download