Methods of Experimental Research of Broadband Piezoelectric Transducer for Medical Applications
| Authors | S.A. Naida , T.M. Zheliaskova , A.V. Darchuk, N.S. Naida , A.S. Naida , H.A. Kliushnichenko |
| Affiliations |
National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute", |
| Е-mail | nsa185921-ames@lll.kpi.ua |
| Issue | Volume 15, Year 2023, Number 3 |
| Dates | Received 17April 2023; revised manuscript received 16 June 2023; published online 30 June 2023 |
| Citation | S.A. Naida, T.M. Zheliaskova, A.V. Darchuk, et al., J. Nano- Electron. Phys. 15 No 3, 03029 (2023) |
| DOI | https://doi.org/10.21272/jnep.15(3).03029 |
| PACS Number(s) | 43.38. + n |
| Keywords | Piezoelectric transducer, Piezoelectric emitter, Method of two voltmeters and phase meter, Wattmeter, Radiometry. |
| Annotation |
The article discusses methods of experimental research of broadband ultrasonic therapeutic piezo transducers, and devices that provide these methods. The broadband piezo transducer under investigation has a frequency band from 1 MHz to 3 MHz, and consists of a plate piezo element with a large mechanical quality factor and electromechanical coupling factor with one transition layer of duralumin, and two correcting electrical links. The method of monitoring acoustic contact with the patient's body, which is used in narrow-band piezo transducers, is not suitable for wide-band ones, so a high-frequency wattmeter was developed, which, together with the radiometer, is designed to control the effectiveness of the therapeutic procedure in ultrasonic therapeutic devices of the new generation for contact control and simultaneous measurement of consumed electrical and emitted acoustic power. The operation of the high-frequency wattmeter is based on a simplified quadrature multiplication scheme, which does not require additional power sources. The radiometer for measuring the radiated acoustic power is implemented in the form of a free float, which ensures the high sensitivity of the radiometer and the portability of the design. The scheme and ratio of the method of measurement and analysis of their amplitude-frequency characteristics, which are important for broadband converters, are given. In the process of manufacturing or operation of piezo transducers, deviations of their parameters from the calculated ones may occur. In this case, it is necessary to measure the main electrical parameters. For this, a method of two voltmeters and a phase meter was developed, which is based on obtaining and processing the amplitude-frequency characteristic of the active and reactive components of the electrical impedance of the piezo transducer, which is also described in detail in the article. In addition, the results of an experimental study of a broadband therapeutic emitter using the specified devices and based on the proposed methods are presented. |
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