Optimized Design of Lithium Niobate Tuning Forks for the Measurement of Fluid Characteristic Parameters.

Micromachines (Basel)

State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China.

Published: November 2023

AI Article Synopsis

  • The double-cantilever beam structure of tuning forks allows for simultaneous and decoupled measurements of fluid density and viscosity, making them valuable in various industries like oil and gas and food processing.
  • This study examines quality factors to understand energy losses in lithium niobate tuning forks within fluids and analyzes how different design parameters (length, width, thickness) affect these factors, particularly the viscous quality factor.
  • The research optimizes the tuning fork's dimensions for both air and fluid applications, demonstrating that the improved design has a higher quality factor and increased sensitivity to changes in fluid properties, which is crucial for their practical use.

Article Abstract

The unique double-cantilever beam structure and vibration mode of the tuning fork enable the measuring of fluid density and viscosity synchronously in a decoupling manner. Therefore, it is widely employed in oil and gas development and in petrochemical, food, textile, and other industries. In this paper, quality factors are used to characterize the energy losses of lithium niobate tuning forks when vibrating in a fluid, and the influence parameters, such as length, width, and thickness of the tuning fork arm, etc., of different quality factors are examined with a focus on the viscous quality factor of the fluid. The optimized design of lithium niobate tuning fork dimensions is carried out on this premise, and the analytical solution of the optimal dimension of the lithium niobate tuning fork in the air is obtained. Secondly, the optimal dimension of the lithium niobate tuning fork in fluids is given out by finite element simulation, and the sensitivity of the optimized fork to the viscosity of fluids is investigated. The results show that the optimized tuning fork has a higher quality factor, and thus has a larger parameter measurement range as well as being more sensitive to the change in the fluid density and viscosity. Therefore, the results are of great significance for guiding the preparation and practical application of lithium niobate tuning forks.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10745021PMC
http://dx.doi.org/10.3390/mi14122138DOI Listing

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