10.14489/td.2014.09.pp.017-024

2014, 09 September

DOI: 10.14489/td.2014.09.pp.017-024

Komarov V.A.
THE DEPENDENCE OF THE DIRECTIONAL CHARACTERISTIC OF PLATED TRANSDUCER ON ITS GEOMETRY AND FREQUENCY OF THE EMISSION. Part 3
(pp. 17-24)

Abstract.

In this article we showed that:
– the length of the transitional and near zones of emission of the EMA transformation are interrelated and are regulated by the same ratio found for the contact pickups;
– the angle saturation of the directional characteristic and the dependence of the displacements amplitude on frequency are defined by the width of the transducer;
– the ratio of the width of the current elements and the spacing between them in the overall width of the transducers do not affect their dependencies frequency;
– the maximum of displacements amplitude is located in the region of low frequencies (approximately 0.5 MHz) and shifted into the area of even lower frequencies with increasing the width of the emitter.

Keywords: EMA transformation, directional characteristic, shear waves, width of the emitter, frequency.

+ - About the Authors Click to collapse

V. A. Komarov
Physical-Technical Institute of the Ural Branch of the Russian Academy of Sciences, Izhevsk, Russia. E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.

+ - References Click to collapse

1. Lependin L. F. (1978). Acoustics. Moscow: Vysshaia shkola.
2. Komarov V. A., Muzhitskii V. F. (1997). The theory of physical fields. Part 1. Electromagnetic field. Izhevsk: RIO UDGU.
3. Komarov V. A. (2013). Modeling manifestations of elec-tromagnetic-acoustic transformation in metals. I. The transformation of the quasi-stationary inhomogeneous electromagnetic fields in elastic shear waves. Kontrol'. Diagnostika, (3), pp. 17-25.
4. Komarov V. A. (2013). Modeling manifestations of elec-tromagnetic-acoustic transformation in metals. Part 2. The antiphase pattern surface of the emitter. Kontrol'. Diagnostika, (12), pp. 17-24.
5. Gurevich S. Iu., Shakhin E. P. (2002). Physics. Part 1. Cheliabinsk: Izdatel'stvo IuUrGU.
6. Komarov V. A., Muzhitskii V. F., Gurevich S. Iu. (2000). The theory of physical fields. Vol. III. The related fields. Cheliabinsk–Izhevsk: Izdatel'stvo IuUrGU.
7. Komarov V. A. (1986). Quasi-static electromagnetic-acoustic transformation in metals. Sverdlovsk: UNTs AN SSSR.
8. Shubaev S. N. (1974). Analysis of the acoustic field excited by an electromagnetic method. Defektoskopiia, (3), pp. 100-109.

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