THE EDDY CURRENT METHOD OF COMPATIBLE MEASUREMENT CONTROL OF REGULATORY PARAMETERS OF BREWERY WASTEWATER SAMPLES

Abstract

The possibility of applying the theory of operation of the inductive parametric eddy-current converter (IPEC) concerning to informative multi-parameter measuring control of physico-chemical parameters of alkaline wastewater samples was studied. Due to the introduction of special normalized parameters and the establishment of universal IPEC conversion functions, which connect the physicochemical characteristics of the investigated liquid with the amplitude and phase components of IPEC signals, algorithms for the measurement and calculation procedures of the combined control of dynamic viscosity µt, relative dielectric constant εrt, specific electrical conductivity χt and temperature t of wastewater samples of small-capacity breweries (mini-breweries). Algorithms of measurement and calculation procedures of physico-chemical parameters of wastewater samples were studied. It was established that even slight changes in the parameters µ, εr, χ and t lead to changes in the signal components of eddy-current converters: flux linkages ψ, resistances Ω and inductances of the windings L1 and L2 of the IPEС and as a consequence of the generalized normalized characteristics A, G and j, which connect signal components of transducers with physicochemical parameters of wastewater samples. The accuracy of joint determination of the physicochemical parameters of wastewater samples is explained by the fact that data on dynamic viscosity µ, relative dielectric constant εr, specific electrical conductivity χ and temperature t are obtained as a result of probing wastewater samples with an eddy-current field, which causes the flow of eddy currents, in its turn, the eddy currents, a change in the parameters µ, εr, χ is observed, which is associated, including, with a change in the temperature t of the investigated wastewater samples.