Viscosity Measurement Using Oscillation Frequency and Phase Analysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for determining viscosity of a medium using mechanically oscillatable units are not precise and are influenced by disturbance variables such as density and fill level, which complicates accurate measurement.
Innovation Solution
The method involves exciting a mechanically oscillatable unit to execute mechanical oscillations, measuring the eigenfrequency, resonance frequency, and phase relationship between the exciter and received signals, and using stored dependencies to deduce viscosity while keeping disturbance variables constant, such as density and fill level, to isolate viscosity measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If mechanically oscillatable units are used to determine viscosity, then viscosity measurement is enabled, but measurement precision is degraded due to influence from disturbance variables such as density and fill level
Solution Approach 1:
The patent changes the geometric parameters of the mechanically oscillatable unit (specifically the ratio of oscillation amplitude to wavelength) to optimize the measurement. By adjusting these parameters, the system achieves a state where the oscillation characteristics become primarily sensitive to viscosity while minimizing sensitivity to density and fill level, thereby resolving the contradiction between enabling viscosity measurement and avoiding disturbance from other parameters
Solution Approach 2:
The patent employs dynamic oscillation characteristics of the mechanically oscillatable unit, utilizing resonance frequency and phase relationships that change with viscosity. The system dynamically adjusts excitation frequencies and monitors changes in oscillation behavior to isolate viscosity effects from density and fill level influences, improving measurement precision through dynamic analysis
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach allows for precise determination of viscosity by minimizing the influence of disturbance variables, ensuring that the measured characteristics depend essentially on viscosity alone, thereby enhancing the accuracy of viscosity measurement.
Implementation Method 1
at least one mechanically oscillatable unit (1) is excited to execute mechanical oscillations based on an exciter signal, and wherein mechanical oscillations are received from the mechanically oscillatable unit (1) and transduced into a received signal
Implementation Method 2
eigenfrequency (ω0) of the mechanically oscillatable unit and/or resonance frequency (ωres) of the mechanically oscillatable unit and/or phase relationship between the exciter signal and the received signal is/are ascertained and/or monitored
Implementation Method 3
after the exciting of oscillations of the mechanically oscillatable unit, decay of the oscillations of the mechanically oscillatable unit is ascertained
Data Source
AI summary
A method for determining and/or monitoring the viscosity of a medium, wherein a mechanically oscillatable unit is excited to execute oscillations based on an exciter signal, and wherein oscillations are received from the mechanically oscillatable unit and transduced into a received signal. The eigenfrequency and/or resonance frequency of the mechanically oscillatable unit and/or phase relationship between the exciter signal and the received signal are/is ascertained and/or monitored, and from changes in the eigenfrequency and/or resonance frequency and/or phase relationship, a change in viscosity is deduced and/or, based on dependencies of the oscillations on the viscosity of the medium, from the eigenfrequency and/or resonance frequency and/or phase relationship, viscosity is ascertained. In a second variant of the method, decay behavior of the mechanically oscillatable unit is evaluated. An apparatus for determining and/or monitoring viscosity is also presented.