Automatic determination of viscosity by rotary viscosimeter vrts
- Authors: Korganova O.G.1, Kuznetsov V.A.1
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Affiliations:
- Samara State Technical University
- Issue: Vol 27, No 2 (2019)
- Pages: 88-98
- Section: Instrumentation, Metrology and Informative-measurings devices and systems
- URL: https://journals.eco-vector.com/1991-8542/article/view/21344
- DOI: https://doi.org/10.14498/tech.2019.2.%25u
- ID: 21344
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Abstract
If it is necessary to determine the viscosity at a given temperature, various viscometers of various types, mostly rotational ones can be used. These viscometers need to stabilize the frequency of rotation of the measuring rotor and the use of thermostats, since the viscosity is strongly dependent on temperature. A method for measuring viscosity without these disadvantages is proposed. A viscometer contains two channels: a viscosity measuring channel and a temperature measuring channel. Rotation of the measuring rotor is carried out by a drive through a calibrated spring, the angle of its twisting is proportional to the torque, which is converted into a pulse-width signal. The microcontroller measures and analyzes PWM signal and a stress proportional to temperature, converts them into a digital code and outputs the information on viscosity and temperature through the output port in a digital form. The algorithm proposed for processing measurement information eliminates the need to stabilize the frequency of rotation of the measuring rotor.
About the authors
O. G. Korganova
Samara State Technical University
Author for correspondence.
Email: Info@eco-vector.com
Russian Federation
V. A. Kuznetsov
Samara State Technical University
Email: Info@eco-vector.com
Russian Federation