The work presents the results of theoretical research and simulation of “fringing” current distribution and its influence on the output signal of a conductive sensor which is used as a measuring device for determining a cross-sectional area of liquid flow (in particular, milk flow) and consists of electrodes placed on the walls of the dielectric tube with a rectangular cross-section.
As a result, an influence coefficient of fringing current on measurement results has been obtained, which determines the deviation of the total current of the sensor from the current of the same sensor without taking into account the fringing current.
It has been determined the cross-sectional area of the current flow where fringing current significantly influences the value of the sensor output signal. This allows determining the minimum length of the conductive sensor. The results of research are presented in graphical and numerical forms.
- N. Dubovikova, Y. Kolesnikov, C. Karcher, “Flow rate measurement in aggressive conductive fluids”, in EPJ Web of Conferences 67, pp.1–5, 2014.
- R. Hunt, “How to Increase the Accuracy of Solution Conductivity Measurements”. http://www.aitsouth west.com/AccurateConductivity802.pdf, 1995.
- M. Zaninelli and F. Maria, “Conductimetric milk meter”, in Proc. Computers in agriculture and natural resources, Orlando, Florida, USA, 2006.
- V.Vaschenko, V. Versal, and V.Voitiuk, Technique of milk volume measurement in a milk tube. Ukraine Patent №39818, 2001. (Ukrainian)
- V.Versal and V.Voitiuk, “Substantiation of technique for milk expenditure measurement”, Tehnika v silskogospodarskomu vyrobnytstvi, haluzeve mashynobuduvannia, avtomatyzatsiya, no. 6, pp. 123–125, Kirovograd, Ukraine: Kirovograd National Technical University, 2000. (Ukrainian)
- V.Voitiuk and V.Versal, “Peculiarities of sensor design for milk expenditure measurement based on electrochemical method of velocity measurement and conductimetric method of liquid volume measurement”, in Proc. XV International Conf. “Datchiki i preobrazovateli informatsii, sistem izmereniya, kontrolya i upravleniya”, pp. 111–112, Moscow, Russian Federation, 2003. (Russian)
- “QuickField 6.0 User's Guide”, http://quickfield. com/ freedoc.htm