APPLICATION OF AN ELECTROMAGNETIC NUMERICAL MODEL IN ACCURATE MEASUREMENT OF HIGH VELOCITIES


Abstract

The velocity of various objects measured within a large number of disciplines and activities. This paper presents the process of designing an accurate method and equipment for the measurement of velocity in one-shot nonlinear processes, which occur only once and are thus characterized by zero repeatability. The measurement methods must therefore enable the recording, saving, and retroactive evaluation of the processes at a pre-defined accuracy; all these operations are performed to facilitate comparison of the recorded event and other similar processes. However, the electromagnetic method described in the paper does not include the disadvantages of known optical methods. We therefore present the design of an inductive sensor equipped with an electronic signal processing system. This design is based on numerical evaluation of the relativistic effect occurring during the application of the electromagnetic principle in sensing the position and velocity of an object J. Van Bladel. The final section of the paper contains a discussion of the measured results. The authors investigate the use of a coupled model of the magnetic field and analyze the motion of a conductive object in this field. The analysis shows that, for an exact evaluation of the influence of all effects, it is necessary to consider the phenomena related to the movement of a system relative to the other one. It is shown that related distinctive effects affect the resultant electromagnetic field distribution already at the relative velocity of v0= 1m∙s-1.


Keywords

relativistics; model; numerical model; FEM; electro-hydro-dynamics; moving objects, projectile

Ansys Inc.: Ansys Theory Reference Manual. Program Ansys supplement.

Boquan Li, Wang Xiaofei, Pan Habin a Luo Kaiyu: Study on Error Analysis of Measuring Projectile's Speed Using Induction-Type Coil Target. Electrical and Kontrol Engineering (ICECE), 2010 International Conference on [online]. Wuhan, 2010 [04.11.2011].

Dědek L., Dědková J.: Elektromagnetismus, VUTIUM, Brno, Czech Republic, 2000.

Faiz J., Ebrahimir B. M.: Mixed fault diagnosis in three- phase squirrel-cage induction motor using analysis of air-gap magnetic field. Progress in Electromagnetics Research, Vol. 64, 2006, 239–255.

Fiala P.: EMHD model used for linear moving objects analysis. Progress in electromagnetic research, Boston, USA, 5–8.07.2010.

Fiala P.: Secondary winding model of current transformer-switchable variant. Research report, Laboratory of modeling and optimization field in electromagnetic systems, FEI VUT and ABB EJF a.s. Brno, no. 1/99, 21.01.1999, Brno, Czech Republic, 1999.

Fiala P.: Transformer partial discharge modeling, minimal breakdown value set in critical parts of transformer design. Research report, Laboratory of modeling and optimization field in electromagnetic systems, FEI VUT and ABB EJF a.s. Brno, no. 2/99, 18.03.1999, Brno, Czech Republic, 1999.

Fiala P., Szabo Z., Friedl M.: EMHD Models Respecting Relativistic Processes of Trivial Geometries. Progress In Electromagnetics Research Symposium Proceedings, Suzhou, China, 12–16.09.2011.

Haňka L.: Teorie elektromagnetického pole. SNTL, Praha, Czech Republic, 1971.

Holmes J., Ishimaru A.: Relativistic communications effects associated with moving space antennas. Antennas and Propagation, IEEE Transactions on, Vol. 17, Iss. 4, 1969, 484–488.

Hua Y., Liu Q. Z., Zou Y. L., Sun L.: A haybrid FE-BI method for electromagnetic scattering from dielectric bodies partially covered by conductors. Journal of Electromagnetic Waves and Applications, Vol. 22, No. 2–3, 2008, 423–430.

Jha P., Raj G., Upadhyaya A.K.: Relativistic and ponderomotive effects on stimulated Raman scattering of intense laser radiation in plasma. Plasma Science, IEEE Transactions on, Vol. 34, Iss. 3, Part 3, 2006, 922–926.

Kikuchi H.: Electrohydrodynamics in dusty and dirty plasmas, gravito-electrohydrodynamics and EHD. Kluwer Academic Publishers, 2001.

Kuneš J., Vavroch O., Franta V.: Základy modelování. SNTL, Praha, Czech Republic, 1989.

Maxwell J. C.: A treatise on electricity and magnetism. London Macmillan and co., Publishers to the University of Oxford, 1873.

PROTOTYPA, 2007. Avialable from: http://www.prototypa.cz/menu1.html [09.12.2011]

Stratton J.: Teorie elektromagnetického pole, SNTL, Praha, Czech Republic, 1985.

Touati S., Ibtiouen R., Touhami O., Djerdir A.: Experimental Investigation and Optimization of Permanent Magnet Motor Based on Coupling Boundary Element Method with Permeances Network. Progress In Electromagnetics Research, Vol. 111, 2011, 71–90.

Van Bladel J.: Foucault currents in a conducting sphere moving with constant velocity. IEE Proceedings, Vol. 13S, Pt. A, No. 7, September 1988.

Van Bladel J.. Motion of a conducting loop in a magnetic field. IEE Proceedings, Vol. 13.5, Pt. A, No. 4, April 1988.

Yarim C., Daybelge U. Sofyali A.: Search for the general relativistic effects on the motion of a spacecraft. Recent Advances in Space Technologies, RAST'09. 4th International Conference, 2009, 553–556.

Download

Published : 2015-09-02


Fiala, P., & Friedl, M. (2015). APPLICATION OF AN ELECTROMAGNETIC NUMERICAL MODEL IN ACCURATE MEASUREMENT OF HIGH VELOCITIES. Informatyka, Automatyka, Pomiary W Gospodarce I Ochronie Środowiska, 5(3), 3-10. https://doi.org/10.5604/20830157.1166544

Pavel Fiala  fialap@feec.vutbr.cz
Brno University of Technology, Faculty of Electrical Engineering and Communication, Department of Theoretical and Experimental Electrical Engineering  Czechia
Martin Friedl 
Brno University of Technology, Faculty of Electrical Engineering and Communication, Department of Theoretical and Experimental Electrical Engineering  Czechia