Fluid pressure measurement method for labyrinthine complex flow channel

CN122042124BActive Publication Date: 2026-07-14XIAN AIKEFU FLUID CONTROL TECH CO LTD

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Patents(China)
Current Assignee / Owner: XIAN AIKEFU FLUID CONTROL TECH CO LTD
Filing Date: 2026-04-16
Publication Date: 2026-07-14

AI Technical Summary

Technical Problem

Existing technologies struggle to simultaneously address rheological dispersion compensation and cavitation phase change calibration within labyrinthine flow channels while ensuring the integrity of fluid boundaries, thus hindering the acquisition of static pressure distribution curves along the entire internal path of the labyrinthine flow channel.

Method used

By injecting discrete dual-frequency pulse signals into a labyrinthine complex flow channel, the echo sequence is obtained and the acoustic dispersion time delay deviation is calculated. The acoustic dispersion time delay deviation is used to characterize the sound velocity drift. The local hydrostatic pressure is inverted through the acoustic impedance and pressure image model. Combined with thermal pressure interference decoupling and flow channel resistance correction, the accurate measurement of hydrostatic pressure is achieved.

Benefits of technology

Without altering the physical boundary integrity of the flow channel, this method eliminates detection failures caused by acoustic signal scattering and shielding, ensuring the benchmark consistency and purity of measurement results, and improving the purity of pressure characterization under non-isothermal flow field conditions.

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Abstract

The present application relates to the technical field of fluid measurement, and discloses a fluid pressure measurement method for a labyrinthine complex flow channel, comprising: injecting a discrete double-frequency pulse signal into the flow channel; collecting an echo sequence generated by reflection at a geometric mutation site; extracting different frequency components corresponding to the same site in the echo and calculating an acoustic frequency dispersion time delay deviation, representing the sound speed drift characteristics of the fluid under high shear working conditions; adjusting the characteristic echo integration window width according to the deviation, recombining the echo energy and obtaining the reflected sound intensity amplitude; and inverting the local fluid static pressure by using an acoustic impedance and pressure mapping model, wherein the present application compensates for the acoustic wave dispersion effect caused by fluid shear deformation, eliminates the energy loss caused by phase distortion, and realizes non-destructive characterization of the pressure gradient of the flow channel under the premise of not damaging the physical integrity of the flow channel.

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