Ultrasonic Bessel beam generation from radial modes of piezoelectric discs

Chillara, Vamshi Krishna; Davis, Eric S.; Pantea, Cristian; Sinha, Dipen N.

doi:10.1016/j.ultras.2019.02.002

Cited by 19 publications

(4 citation statements)

References 18 publications

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“…Analytical expression of the thickness mode resonance frequencies of the PZT ring is given as [29][30][31][32] • (…”

Section: Admittance Characteristicsmentioning

confidence: 99%

A high-power ultrasonic transducer operated in MHz range by circular plate bending mode using a single parabolic reflector

Wang,

Yamada,

Hasegawa

et al. 2024

Jpn. J. Appl. Phys.

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This research developed a high-frequency, high-power ultrasonic transducer. Operating at 1.54 MHz, the transducer generated plane waves through the excitation of the thickness mode of a piezoelectric ring. These waves are subsequently focused by a parabolic reflector, exciting the bending mode of a circular plate and yielding substantial mechanical output at the center. Under a driving voltage of 48 Vpp, the transducer achieved a saturation velocity of 11.7 mpp/s. The mechanical quality factor (Q_m) of the resonant mode is calculated using the half-power bandwidth method, resulting in a value of approximately 1250. The proposed transducer exhibits outstanding performance and holds promising applications in the fields of biology, medicine, and sonochemistry.

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“…Analytical expression of the thickness mode resonance frequencies of the PZT ring is given as [29][30][31][32] • (…”

Section: Admittance Characteristicsmentioning

confidence: 99%

A high-power ultrasonic transducer operated in MHz range by circular plate bending mode using a single parabolic reflector

Wang,

Yamada,

Hasegawa

et al. 2024

Jpn. J. Appl. Phys.

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“…This piezoelectric disc exhibited a fundamental radial mode at 215 kHz ± 5 kHz. The radial mode allowed for significantly smaller dimensions while maintaining good coupling and the focusing of the main lobe of the longitudinal wave propagation at a given operation frequency [ 28 , 29 ].…”

Section: System Designmentioning

confidence: 99%

Wireless Passive Sensor Technology through Electrically Conductive Media over an Acoustic Channel

Schaechtle

Aftab

Reindl

et al. 2023

Sensors

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Hydrogen-based technologies provide a potential route to more climate-friendly mobility in the automotive and aviation industries. High-pressure tanks consisting of carbon-fiber-reinforced polymers (CFRPs) are exploited for the storage of compressed hydrogen and have to be monitored for safe and long-term operation. Since neither wired sensors nor wireless radio technology can be used inside these tanks, acoustic communication through the hull of the tank has been the subject of research in recent years. In this paper, we present for the first time a passive wireless sensor technology exploiting an ultrasonic communication channel through an electrically conductive transmission medium with an analog resonant sensor featuring a high quality factor. The instrumentation system comprised a readout unit outside and a passive sensor node inside the tank, coupled with geometrically opposing electromechanical transducers. The readout unit wirelessly excited a resonant sensor, whose temperature-dependent resonance frequency was extracted from the backscattered signal. This paper provides a description of the underlying passive sensor technology and characterizes the electric impedances and acoustic transmission as an electrical 2-Port to design a functional measurement setup. We demonstrated a wireless temperature measurement through a 10 mm CFRP plate in its full operable temperature range from −40 to 110 °C with a resolution of less than 1 mK.

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“…When the appropriate geometric size was selected, the vibration system could effectively radiate high-power ultrasound [17]. Lee h, et al studied the near-field and far-field acoustic radiation characteristics of the radial vibration of a piezoelectric ceramic disk, and calculated the analytical solution of the modal acoustic radiation of a thick disk with a free boundary [18][19][20]. However, up to now, most of the coupling analysis seeks to understand the coupling characteristics of piezoelectric vibrators and there have been few studies on how to reduce the coupling effect.…”

Section: Introductionmentioning

confidence: 99%

A Thickness-Mode High-Frequency Underwater Acoustic Transducer with a Low Sidelobe Level

Hui

Wang

et al. 2021

Actuators

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Thickness vibration mode is commonly used for high-frequency transducers. For disc piezoelectric ceramics, there is no ideally pure thickness vibration mode because the coupling between the radial and thickness modes always exists. Furthermore, it also deteriorates the transmission voltage response and directivity of the high-frequency transducer. In this paper, based on the theoretical calculation and finite element simulation method, a new method was proposed, and the related experiment was carried out to convince this idea. Both the simulation analysis and experimental results show that drilling a hole at the center of piezoelectric vibration is a simple but effective method to obtain a pure thickness vibration mode of the disc piezoelectric ceramic, and then improve the transmitting ability and directivity of the high-frequency piezoelectric transducer. The sidelobe level is as low as −21.3 dB.

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Ultrasonic Bessel beam generation from radial modes of piezoelectric discs

Cited by 19 publications

References 18 publications

A high-power ultrasonic transducer operated in MHz range by circular plate bending mode using a single parabolic reflector

A high-power ultrasonic transducer operated in MHz range by circular plate bending mode using a single parabolic reflector

Wireless Passive Sensor Technology through Electrically Conductive Media over an Acoustic Channel

A Thickness-Mode High-Frequency Underwater Acoustic Transducer with a Low Sidelobe Level

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