SELF-VIBRATION TYPE MEASURING INSTRUMENT AND METHOD FOR REAL TIME MEASUREMENT RHEOLOGICAL PROPERTIES OF NEWTONIAN/NON-NEWTONIAN FLUIDS

摘要

Self-oscillating measurement system according to the present invention having a fixed end and a free end, avoiding contact with the measured fluid, Bo, force caused by the vibration of the beam, the beam and simple shear deformation between the measured fluid (Simple Shear) (f _fluid ) and is coupled to the beam to be able to generate a piezoelectric element, vibrating beams to When the beam of a point (x = x1) of the accelerometer is coupled to the beam in order to measure the acceleration, the measured fluid's viscosity and the elastic-related variable comprises a calculation module for calculating each. Acting force calculation module according to the measured fluid (f _fluid ) is the voltage (V) applied to the acceleration and the piezoelectric element at a point (x = x1) of the beam of with and without the Each experimental transfer function to calculate and measure, respectively, the measured force by the fluid (f _fluid ) beam of frequency using the experimental and the theoretical transfer function of the transfer function thereof is not (k _{b calculates a} ), the calculated beam wave number (k _b ) and the measured force by the fluid (f _fluid ) of the time there is a Using experimental and theoretical transfer function transfer function for it to be measured and the viscosity of the fluid and elastic compute each of the relevant variables.