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Proceedings Paper

Viscosity measurement method with integral signal processing
Author(s): Maciej Kozarski; Edward Krauze
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Paper Abstract

The new method of measurement signal processing applied in the oscillometric viscometer is presented. The method consists in analog integration of a current in the electromagnetic speaker-like actuator. Integration in displacement domain is replaced by the integration in time domain during the period of oscillations. This method of signal processing has advantages as compared to simple amplitude measurement methods i.e. first of all, better resistance to disturbing mechanical vibrations close to the working frequency of oscillations. The measuring circuit is practically insensitive to thermal drifts of electrical zeros and gains and thermal fluctuations of mechanical parameters as well. Also nonlinearities of static characteristics (e.g. of bellows) have a negligible contribution as far as a result of measurements is concerned. Some design aspects and results of examinations concerning a clinical model of the viscometer are presented. The described method of signal processing may be applied in different types of viscometers.

Paper Details

Date Published: 30 April 1999
PDF: 4 pages
Proc. SPIE 3730, Optoelectronic and Electronic Sensors III, (30 April 1999); doi: 10.1117/12.346864
Show Author Affiliations
Maciej Kozarski, Institute of Biocybernetics and Biomedical Engineering (Poland)
Edward Krauze, Institute of Biocybernetics and Biomedical Engineering (Poland)


Published in SPIE Proceedings Vol. 3730:
Optoelectronic and Electronic Sensors III
Antoni Nowakowski; Bogdan Chachulski, Editor(s)

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