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Four-parameter electromagnetic method for determining the parameters of brewery effluents

Sebko V. V., Pyrozhenko Ye. V., Zashchepkina N. M., Zdorenko V. G., Markina O. M.

Journal of Achievements in Materials and Manufacturing Engineering

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2022

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Vol. 113, nr 2

49--64

EN

Purpose: of the article is to study a four-parameter electromagnetic method for joint measurements of electrical resistivity k, relative permittivity εr, temperature t and density ρ of samples of acidic, alkaline and average effluents from a microbrewery based on a magnetic flux probe (MFP), which considers the influence of informative parameters of beer effluents on the components of the amplitude and phase signals of a multiparameter device. Design/methodology/approach: The implementation of the four-parameter method is carried out on the basis of the dependences G1 = f (A1) and G2 = f (A2) at two frequencies of the electromagnetic field f0 and f1 for acid, alkaline and average effluent and allows you to jointly determine the four parameters of effluent samples with the same converter in the same control area. The proposed method makes it possible to improve the accuracy of identifying effluent samples since the obtained multiparameter information makes it possible to determine the nature and properties of effluent samples using only one transducer with certain physical characteristics. The research results lead to the expansion of the technical capabilities of electromagnetic measurement methods, as well as to an increase in the metrological characteristics of electromagnetic transducers and an increase in the accuracy of measuring the parameters of effluent samples compared to reference methods and measuring instruments. Thus, the implementation of this approach contributes to the prediction and prevention of the reasons for the deviation of beer effluent samples from the specified indicators of environmental safety. Findings: The universal conversion functions MFP have been established, connecting the amplitude and phase components of the converter signals with the parameters k, εr, t and ρ of acidic, alkaline and average effluents. Based on the universal transformation functions G1 = f (A1) and G2 = f (A2), a four-parameter electromagnetic method for joint measurements of electrical resistivity k, relative permittivity εr, temperature t and density ρ of acidic, alkaline, and average effluents from breweries has been developed. When conducting research at two close frequencies of the electromagnetic field f0 = 20.3 MHz and f1 = 22 MHz, algorithms were obtained for measuring and calculating procedures for determining k, εr, t and ρ for samples of acidic, alkaline and average effluents from the brewing industry. Research limitations/implications: Research perspectives consist in the creation of automated systems for multiparameter measuring control of the physicochemical characteristics of acidic and alkaline effluent from food and processing industries based on the immersed electromagnetic transducer. Based on the data obtained using informative methods to measure the parameters of effluent samples, an integrated method for treating beer effluents of various compositions will be proposed. At the same time, the scheme of the integrated treatment method should include a filter that provides the introduction of a magnetic fluid and a separation device that allows us to remove a fraction, including pollution in itself. Practical implications: Is that the proposed four-parameter electromagnetic method makes it possible to determine to what composition the controlled samples of wastewater should be attributed (acidic or alkaline). It, in turn, makes it possible to choose a rational method for treating beer effluents and to prevent the reasons for the deviation of effluent samples from the environmental safety indicators set by the standards. Originality/value: of the article is the research related to the expansion of the functional and technical capabilities of the electromagnetic two-frequency transducer MFP through the implementation of a four-parameter electromagnetic method of joint measurements of electrical resistivity k, relative permittivity εr, temperature t and density ρ of acidic, alkaline and average effluents from breweries. The universal transformation functions G1 = f (A1) and G2 = f (A2) found in the work at two close magnetic field frequencies, f0 = 20.3 MHz and f1 = 22 MHz, make it possible to control four physicochemical parameters of acidic, alkaline and average wastewater at the same time by the same MFP. An algorithm has been developed for determining the signal components of a two-frequency thermal MFP, the ranges of which correspond to the ranges of changes in electrical resistivity k, relative permittivity εr, temperature t and density ρ of acidic, alkaline, and average brewery effluents. The basic relations that describe the two-frequency four-parameter electromagnetic method of joint measurements of the physicochemical parameters of acidic, alkaline and averaged beer effluents have been obtained.

2

The accuracy of the navigational accelerometer with a nonlinear metrological model in operating conditions

Chernyak Mycola, Kolesnyk Vadym

Transactions on Aerospace Research

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2020

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Nr 3 (260)

1--10

EN

A mathematical model of the error of the navigational accelerometer caused by the nonlinearity of its metrological model, taking into account the influence of vibration, was developed. The method of experimental estimation of the vibration error based on the developed model was proposed. The main idea of the method is to evaluate parameters of the developed model during static tests in the terrestrial gravitational field and to calculate error according to the specific vibration characteristics – the amplitude in the case of harmonic vibration profile or the frequency band and the power spectral density in the case of random vibration. The effectiveness of the proposed method has been tested using three types of navigation accelerometers in comparison with the results of classical dynamic testing in various vibration conditions (harmonic, white noise, etc.).

PL

Opracowano model matematyczny błędu akcelerometru nawigacyjnego spowodowany nieliniowością jego modelu metrologicznego, uwzględniający wpływ wibracji. Zaproponowano metodę eksperymentalnego oszacowania błędu wibracji w oparciu o opracowany model. Główną ideą metody jest ocena parametrów opracowanego modelu podczas prób statycznych w ziemskim polu grawitacyjnym i obliczenie błędu zgodnie ze specyficznymi cechami drgań – amplitudą w przypadku profilu drgań harmonicznych lub pasma częstotliwości i spektrum mocy gęstość w przypadku drgań losowych. Skuteczność proponowanej metody została przetestowana przy użyciu trzech rodzajów akcelerometrów nawigacyjnych w porównaniu z wynikami klasycznych testów dynamicznych w różnych warunkach drgań (harmoniczne, biały szum itp.).

3

Niepewność decyzji o zgodności mierzonego obiektu z wymaganiami

Volodarsky E. T., Koshevaya L. A., Warsza Z. L.

Pomiary Automatyka Kontrola

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2012

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R. 58, nr 4

391-395

PL

Wskazano na konieczność uwzględnienia rodzaju charakterystyki przetwarzania urządzeń pomiarowych przy szacowaniu niepewności decyzji o zgodności parametrów obiektu z wymaganiami, podejmowanej na podstawie wyników pomiarów. Rozpatrzono wpływ parametrów funkcji przetwarzania systemu pomiarowego na prawdopodobieństwo i rodzaj decyzji. Zanalizowano możliwe warianty parametrów funkcji przetwarzania i odpowiadające im niepewności podejmowanych decyzji. Rozważania zilustrowano przykładem. Podano krótkie wnioski i bibliografię.

EN

The necessity of taking into account the conversion characteristic form of the instrument in estimating the uncertainty of the decision statement at the comply with the requirements of the object based on the measurement results of its parameters is discussed. The influence of parameters of the instrument conversion function on the character of decision and its probability is considered in the paper. The possible variants of the conversion function components and the corresponding uncertainty of decision-making are discussed. The considerations are illustrated by the example. Short conclusions and bibliography are given.