Archives of Acoustics

Leiko, Oleksandr; Дерепа, Анатолий; Rasstrygin, Aleksandr; Kosiakovskyi, Andrii; Kocharian, Oksana; Starovoit, Yaroslav Ivanovych

doi:10.24425/aoa.2019.126359

Cited by 2 publications

(4 citation statements)

References 5 publications

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“…The hydroacoustic measurements were carried out in accordance with the requirements specified in hydroacoustics [15]. Their root-mean-square error was 0.08 with a confidence level of 0.95.…”

Section: Experimental Studies and Their Resultsmentioning

confidence: 99%

“…Each of these functions has its own physical characteristics. The peculiarity of the first function of piezoceramic electromechanical transducers is the presence of an interconnection between three physical fieldselectrical, mechanical, and acoustic, involved in the process of energy conversion [3,[14][15][16]. A feature of the second function of the transducer is the interaction of acoustic fields created by the elements of the transducer's structure in the process of forming its full acoustic field [14][15][16].…”

Section: On the Physical Characteristics Of The Conversion Of Electrical Impulses Into Acoustic In Piezoceramic Electromechanical Transdumentioning

confidence: 99%

“…The analysis of published materials [4][5][6][7][8][9][10][11][12][13][14][15][16] indicates 06022-2 that in the design support for detecting distortions in the parameters of pulses of acoustic location systems, the greatest success was achieved in non-destructive testing [5][6][7][8][9][10][11][12][13]. This is due to the use of a simpler and more advanced numerical method for determining the parameters of pulses -the method of equivalent electromechanical circuits [4,5].…”

Section: Introductionmentioning

confidence: 99%

“…This method is based on the joint solution of a system of differential equations, which include the wave equation describing the propagation of sound waves in the media surrounding transducers of the location system, equations of electromechanical vibrations of system transducer structures and equations of state of piezoelectric ceramics in transducers. To date, such an approach has been considered for acoustic location systems with stationary excitation of their transducers [14][15][16]. The complexity and underdevelopment of methods for calculating the formation of mechanical and acoustic fields of such systems in pulsed modes of their operation leads to the need for an experimental assessment of these fields in the indicated modes of operation of location systems.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Data on Dynamic Changes of Radio Pulses When They are Emitted by Piezoceramic Electromechanical Transducers

Leiko¹,

Дерепа²,

Pozdniakova³

et al. 2021

J. Nano- Electron. Phys.

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The article discusses the issue of distortion of acoustic signals emitted by piezoelectric transducers in relation to electrical excitation signals. It has been shown experimentally that in acoustic locating systems, exciting electrical pulse signals differ significantly from the acoustic pulses emitted by them. The study was carried out on a cylindrical piezoceramic transducer. The reason for these differences is the presence of piezoceramic electromechanical transducers in radar systems. Their resonant oscillatory systems are formed by two circuits, electrical and mechanical, interconnected by an ideal electromechanical transformer. The physical properties of these contours differ significantly in their purposes and properties. The electrical circuit of the converter is involved only in the conversion of energy, and its mechanical circuit is involved both in the conversion of energy and in its formation in the environment. The main difference in the properties of the circuits is the significant inertia of the mechanical circuit as a mechanical resonant oscillatory system and the inertia of the medium loading it when sound is emitted. This explains the occurrence of transient processes during the formation of acoustic pulses and their absence during the formation of electrical pulses. The distortions of acoustic pulses caused by transient processes have been experimentally established. They consist of a smooth rise of the leading edge of the acoustic pulse and the decay of its rear front, as well as the appearance at the beginning and at the end of short, sharp "bursts" of acoustic pressure amplitudes. It is shown that the magnitude and nature of the manifestation of dynamic distortions of acoustic pulses depend on the ratio of frequencies of harmonic filling of electrical pulses and the frequency of mechanical resonance of a piezoceramic electromechanical transducer. Filling frequencies of 3.5, 7 and 10 kHz were investigated, which correspond to frequencies below the mechanical resonance of the transducer, the resonance frequency, and frequencies above the mechanical resonance. It is concluded that it is necessary to assess the resolution of acoustic locating devices based on their acoustic pulses of radiation and reception.

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Section: Experimental Studies and Their Resultsmentioning

confidence: 99%

Section: On the Physical Characteristics Of The Conversion Of Electrical Impulses Into Acoustic In Piezoceramic Electromechanical Transdumentioning

confidence: 99%