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Development of a multi frequency phase method for measuring ranges

Liubchyk Vitalii, Yanovickiy Oleksandr, Zlepko Sergii M., Senchyshyna Yuliya, Wójcik Waldemar, Ussatova Olga, Tergeusizova Aliya

Przegląd Elektrotechniczny

2019

R. 95, nr 4

142--145

The results of the development of a multi frequency phase method for measuring distance are presented. Mathematical transformation of a system of equations connecting complex amplitudes of harmonic summation signals and complex amplitudes of signals reflected from each object, the result of which is the obtaining of a polynomial equation. The solution of the polynomial equation gives the values of the unit vectors of signals reflected from each target.

W pracy przedstawiono wyniki opracowania metody wieloczęstotliwościowej dla pomiaru odległości. Rozwiązanie równania wielomianowego daje wartości wektorów jednostkowych sygnałów odbijanych od każdego celu.

On SH Wave Scattering in TRC. Pt. 1, Concentric Elliptical Inclusion

Weber W., Zastrau B. W.

Machine Dynamics Problems

2009

Vol. 33, No. 2

105-118

An exact analytical solution for the scattering of antiplane elastic waves by a layered elastic elliptical cylinder is derived. The solution and its degenerate cases are compared with other models, e.g. the scattering due to circular cylindrical scatterers. The effects of the geometrical properties of the interphase are studied. The calculations are performed for material properties as they occur with textile reinforced concrete (TRC), a new building material in civil engineering which is therefore introduced first.