Viskosimeter auf der Basis eines Hydraulischen Rc-Kreises und Entsprechendes Verfahren zur Messung der Viskosität einer Flüssigkeit

Details

Veröffentlichungs-Nr.

EP4752524

Anmeldetag

2. Dezember 2024

Veröffentlichung

3. Juni 2026

Rechtsraum

EP

IPC

G01N11/04

Abstract

The invention relates to a fluid viscosity sensor comprising: - an entrance (E1) for the fluid at initial pressure (P1), - at least one input hydraulic resistance (R1), - at least one hydraulic capacitance (C), - the input hydraulic resistance (R1) being followed by the hydraulic capacitance (C), - preferably at least one output hydraulic resistance (R2) sequentially placed after the elastic hydraulic capacitance (C), - an output (E2) for the fluid, - at least two pressure sensing elements (PS1, PS2), preferably three pressure sensing elements (PS1, PS2, PS3), - a processing device (PD) configured to calculate, when a liquid flow is laminar, a time constant of the viscosity sensor, τ [s], from a temporal variation of the pressure signals from the pressure sensing elements and use said time constant to estimate the viscosity µ of the fluid flowing through the sensor following the formula µ=τ (R1,g + R2,g)/(R1,gR2,gC) [Pa·s], R1,g being equal to the geometrical terms of the input hydraulic resistance (R1) and R2,g being equal to the geometrical terms of the output hydraulic resistance (R2).

Anmelder

Firma

MICROFLUIDICS INNOVATION CENTER

Land

🇫🇷 Frankreich