Compact aerial ultrasonic source integrating the transverse vibration part with the bolt-clamped Langevin transducer

Ohfuchi, Ryota; Kasashima, Takashi; Itoh, Shinsuke; Asami, Tohru; Miura, Hiroyuki

doi:10.35848/1347-4065/acb950

Cited by 2 publications

(1 citation statement)

References 30 publications

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“…29,30) A typical transducer using preload application is the bolt-clamped Langevin type transducer. [31][32][33] The transducer uses bolts and some metal plates to clamp the piezoelectric element. When a bolt is clamped, preload is applied to the piezoelectric element at the optimum torque using a torque wrench.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of transducer for cryogenic actuators by equivalent circuit model

Kubo,

Yagi,

Kanda

et al. 2024

Jpn. J. Appl. Phys.

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Cryogenic environments are increasingly used in scientific and industrial fields. Recently, cryogenic environments are also used for storage and supply of liquid hydrogen, which is considered essential for the realization of a decarbonized society. Actuators to drive a valve that controls such a low-temperature fluid are required. In this study, a piezoelectric transducer that can be driven in the cryogenic environment has been fabricated and evaluated. Although the performance of piezoelectric elements degrades at cryogenic temperatures in general, the application of a preload can suppress the degradation of performance. Equivalent circuits were used for evaluation, and force factors and figures of merit were compared. As a result, the force factor was as high as that at room temperature even at cryogenic temperatures, and a high figure of merit was obtained. The result indicates that the transducer can be used for the driving of micro actuator at cryogenic temperature.

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