The Sensitive Element of Acoustic Sensor on Circular Polarized Waves: From Theoretical Considerations towards Perspective Rotation Rate Sensors Design

Michail Shevelko; Andrey Lutovinov; Aleksandr Peregudov; Ekaterina Popkova; Yasemin Durukan; Sergey Shevchenko

doi:10.3390/s21010032

The Sensitive Element of Acoustic Sensor on Circular Polarized Waves: From Theoretical Considerations towards Perspective Rotation Rate Sensors Design

Sensors (Basel). 2020 Dec 23;21(1):32. doi: 10.3390/s21010032.

Authors

Michail Shevelko¹, Andrey Lutovinov¹, Aleksandr Peregudov¹, Ekaterina Popkova¹, Yasemin Durukan¹, Sergey Shevchenko¹

Affiliation

¹ Department of Electroacoustics and Ultrasonic Technology, Saint Petersburg Electrotechnical University, 197376 Saint Petersburg, Russia.

Abstract

In this paper, the perspectives of using the features of acoustic wave propagation to design rotation rate sensors (RRS) are discussed. The possibility of developing the solid-state sensitive elements (SE) of RRS on acoustic waves of circular polarization is shown. The theoretical basis of bulk acoustic wave propagation under rotation is given. The direct excitation of circularly polarized acoustic wave (CPAW) is considered, the design of the CPAW emitting transducer is offered. The results of experimental studies that indicated the circular nature of the particle motions in the radiated wave are discussed. The principally new concept of the RRS SE design on CPAW, being able to operate under high vibration and acceleration, is proposed. The experimental results revealed a high correlation with theoretical and numerical predictions and confirmed RRS on CPAW operability.

Keywords: acoustic sensor; bulk acoustic waves (BAW); circular polarized acoustic wave (CPAW); rotation rate sensor (RRS); solid-state sensitive element (SE).