Scientific and Technical Journal


ISSN Print 2221-3937
ISSN Online 2221-3805

Using of multiparameter electromagnetic control methods of materials and products for controlling the electrical and magnetic fields of conductive products, which can be used to determine the strength parameters, hardness, mechanical stresses, temperature, and prevailing impurities, is practical interest. The expediency of using electromagnetic transducers with a cylindrical solid product, because in this case the functional connections between the signals of the converter and the product have been determined in the absence of a mechanical stress, is shown. In the paper, further development of electromagnetic methods and implementing converters in the direction of various practical applications and, in particular, for the determination of mechanical stresses, forces, weight of loads, pressures, moments, etc., is considered. Applying the functional dependences of the amplitude and phase of the specific normalized emf of the transformer converter with a cylindrical ferromagnetic product, amplitude and phase frequency methods for determining the mechanical stresses are proposed. The emergence of mechanical stress in the product can result in general to a change in both the values of the magnetic permeability and the specific electric conductivity.

In order to increase the resolving power of a transformer electromagnetic converter when measuring the magnitude of the mechanical stress in a wide range of their variations, the frequency amplitude and phase methods should be used. The essence of both methods is that first, in the absence of a mechanical stress of the product, the value of the frequency of the probe field is defined, corresponding to the maximum steepness of the transformation function, which sets in at 1.5 2%. Both methods were used in the developing of weighing apparatus which having simple conversion function, the design of the elements and high sensitivity to the change in mechanical stresses. These methods also have found application in installations for research of influence of mechanical stresses, deformation on electric and magnetic parameters of products and the samples made of various materials.

DOI 10.15276/eltecs.25.101.2017.53
  1. Gerasimov, V. G., Ostanin, Y. Y., Pokrovskiy, A. D. (1978), Non-destructive control of quality of products by electromagnetic methods [Nerazrushayuschiy kontrol kachestva izdeliy elektromagnitnyimi metodami], Energiya, Moscow, 215 p.
  2. Klyuev, V. V. (1986), Devices for nondestructive testing of materials and products: directory. Vol.2 [Priboryi dlya nerazrushayuschego kontrolya materialov i izdeliy: spravochnik. Kn.2 ], Mashinostroenie, Moscow, 352 p.
  3. Bashtannikov, L. A., Bondarenko, V. I., Sebko, V. P., Tyupa, V. I. (1980), "Determination of the electromagnetic characteristics of the material of solid cylindrical products"["Opredelenie elektromagnitnyih harakteristik materiala sploshnyih tsilindricheskih izdeliy"], Defektoskopiya, No. 8,   pp. 5–9.
  4. Goncharov, B. V. (1975), Theory and practice of non-standard electromagnetic methods of control [Teoriya i praktika bezetalonnyih elektromagnitnyih metodov kontrolya], Mashinostroenie, Moscow, 40 p.
  5. Bondarenko, V. M., Gorkunov, B. M., Sebko, V. P. (1984), "Non-contact measurement of electromagnetic characteristics of cylindrical products" ["Beskontaktnoe izmerenie elektromag-nitnyih harakteristik tsilindricheskih izdeliy"], Izmeritelnaya tehnika, No. 6, pp. 57–58.
  6. Sandovskiy, V. A. (1983), "Research of possibility of sorting steel bar by brands using eddy currents method in a two-parameter version" ["Issledovanie vozmozhnosti razbrakovki prutkovoy stali po markam metodom vihrevyih tokov v dvuhparametrovom variante"], Defektoskopiya,    No. 6, pp. 30–34.
  7. Novitskiy, P. V. (1975), Electrical measurements of non-electrical values [Elektricheskie izmereniya neelektricheskih velichin], Energiya, Leningrad, 576 p.
  8. Gumanyuk, M. N. (1972), Magnetoelastic sensors in automation [Magnitouprugie datchiki v avtomatike], Tehnika, Kiev, 260 p.
  9. Abramovits, M., Stigan, I. (1979), Directory of special functions with formulas, graphs and tables [Spravochnik po spetsialnyim funktsiyam s formulami, grafikami i tablitsami], Nauka, Moscow, 832 p.
Last download:
17 Oct 2018

[ © KarelWintersky ] [ All articles ] [ All authors ]
[ © Odessa National Polytechnic University, 2014-2018. Any use of information from the site is possible only under the condition that the source link! ]