Design of Multi-Element Piezoelectric Emitters for Shock Wave Therapy Devices
MLA Style: Sergey G. Ponomarev, Andrey V. Smirnov, Aleksandr A. Vasin, Aleksandr V. Reznichenko, Ivan A. Poselskiy, Arkadiy A. Skvortsov, Sergey V. Baranenko "Design of Multi-Element Piezoelectric Emitters for Shock Wave Therapy Devices" International Journal of Engineering Trends and Technology 68.9(2020):130-138.
APA Style:Sergey G. Ponomarev, Andrey V. Smirnov, Aleksandr A. Vasin, Aleksandr V. Reznichenko, Ivan A. Poselskiy, Arkadiy A. Skvortsov, Sergey V. Baranenko. Design of Multi-Element Piezoelectric Emitters for Shock Wave Therapy Devices International Journal of Engineering Trends and Technology, 68(9),130-138.
In medical practice, not only devices using ultrasound for diagnostics and treatment have become widespread, but also shock wave therapy devices for short-term exposure to tissues with acoustic impulses. The most important part of shock wave therapy devices (hereinafter referred to as “SWTD”) is the applicator is a device that forms a shock wave and ensures its passage to the target area. Focusing the shock wave is important to avoid exposure to areas of the body that are not subject to therapy. The article discusses the requirements and limitations that arise in the design of a piezoelectric shock wave former (applicator), which is a component of the SWTD. The aim of this work is to formulate reasonable requirements for the main structural elements of the SWTD focusing applicator, built based on piezoelectric emitters (piezo elements) and allowing control of the geometric parameters of the shock wave focus - size, shape, and position in space. To solve this problem, the considered design of the SWTD applicator uses the following methods: the use of water as a propagation medium inside the applicator; the use of a silicone membrane to ensure the passage of the shock wave to the target area; the use of piezoelectric elements for converting the energy of an electric pulse into the energy of a shock wave in a propagation medium; control of piezoelectric elements during the formation of a shock wave as elements of a phased array to ensure the possibility of controlling the geometric parameters of the focus of the shock wave. The results of the work are substantiated requirements for the design of the SWTD piezoelectric applicator, built on the principle of a phased array, and allowing controlling the geometric parameters of the focus of the shock wave. The considered method of installing piezoelectric elements provides for the possibility of their simple replacement as they wear out to increase the resource of the applicator as a whole. For piezoelectric SWDT with the ability to control the geometrical parameters of the focus of the shock wave, the applicator should be built on the principle of a phased array with a significant number of elements. In this case, it should be possible to easily replace individual piezoelectric elements.
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applicator, focusing, phased array, piezoelectric element, shock wave therapy.