Basic Measuring Module for Implementation of the High-Precision Devices for Determining the Impedance Parameters in a Wide Frequency Range

Мельник, В. Г.; Borshchov, P.I.; Beliaev, V. K.; Vasylenko, O.D.; Ламеко, О. Л.; Slitskiy, O.V.

doi:10.15407/publishing2020.56.020

Cited by 3 publications

(4 citation statements)

References 6 publications

(2 reference statements)

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“…In the study of RMM for the cubic TF, a system of redundant equations of quantities (4) was compiled, describing eight measurement cycles both normalized by the value of the quantity and their combination with the desired quantity. This does not differ from the approaches that were used in works [2,7,9], in which the formation of additional signals was also assumed. As a result of the solution of system (4), the equation of excess measurements (5) was built, in which the additive component of the measurement error is excluded owing to the subtraction operation, and the multiplicative component is eliminated owing to the division operation.…”

Section: Discussion Of Results Of Computer Modeling With a Cubic Tran...mentioning

confidence: 89%

“…To overcome this problem, paper [6] proposed a compensation model for increasing the accuracy of the infrared thermal imager due to the influence of dust. To increase the accuracy of measurements in a wide frequency range, new technical solutions for generating test and reference signals, as well as for processing measurement signals in the impedance channel, were developed in [7]. However, the paper does not provide ways of correcting the nonlinearity of the sensor transformation function.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

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Determining features in the application of redundancy for the thermistor cubic transformation function using computer simulation

Shcherban’,

Korohod,

Kolysko

et al. 2024

EEJET

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The object of research is the process of temperature measurement with a platinum thermistor. We have conducted studies on the cubic transformation function of the thermistor when using redundancy that yielded the equation of redundant measurements of the desired temperature. Owing to this, it became possible to directly apply the resulting equation without additional measures to linearize the function of the thermistor transformation. In addition, the obtained value of the desired temperature does not depend on the values of the parameters of the cubic transformation function and their deviations from the nominal values. Experimental studies have proven that the value of the normalized temperature T0 has a greater influence on the result of redundant measurements and the value of the normalized temperature DT on the entire range of measured temperatures Tx is almost unaffected. The best accuracy results (value of relative error δ=0.02 %) were obtained at T0 values lower than –60 °C. When the error of reproduction of normalized temperatures increased from ±0.02 °C to ±0.1 °C, the best accuracy results (value of relative error δ=0.06 %) were obtained at values of normalized temperature T0 below –130 °C. Analysis of results of the absolute error DT revealed that with an error of reproduction of normalized temperatures of ±0.02 °C and at T0=–180 °C, its value does not exceed 0.02 °C, that is, it is within the error of reproduction of normalized temperatures. This allows us to state that it is recommended to use sources of standardized temperatures of high accuracy during measurement control. Thus, there are reasons to assert the prospect for redundant measurements when directly measuring temperature with a thermistor with a cubic transformation function with high accuracy

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Section: Discussion Of Results Of Computer Modeling With a Cubic Tran...mentioning

confidence: 89%

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Determining features in the application of redundancy for the thermistor cubic transformation function using computer simulation

Shcherban’,

Korohod,

Kolysko

et al. 2024

EEJET

View full text Add to dashboard Cite

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“…Its circuit contains digital generators of two coherent quasi-sinusoidal test signals with precise, frequency-independent amplitude adjustment and accurate digital setting of their phase relationships within ±90°. A detailed description of the principles of construction of such a generator, its characteristics and application for measuring the impedance is given in [24,25].…”

Section: Structure and Principle Of Operation Of Differential Conduct...mentioning

confidence: 99%

“…1. Its implementation was based on the unified impedance measuring base module МХР-6, developed at the Institute of Electrodynamics of the National Academy of Sciences of Ukraine for precision measurements in a wide frequency range, which is described in detail in [25]. It should be noted here that in order to achieve the depth of suppression of the influence of background changes, which can be provided by the methods presented above, it is necessary to balance the bridge circuit with errors of 0.01% at frequencies up to 100 kHz.…”

Section: Implementation Of the Hardware-software Conductometric Complexmentioning

confidence: 99%

Hardware and Software Complex for Conductometric Measurements With High Metrological Reliability

Melnyk,

Dzyadevych,

Borshchov

et al. 2023

SEMST

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The article summarizes and supplements the results of the development of methods and tools for improving the reliability of differential measurement of local changes in electrical conductivity in electrolyte solutions using a pair of interdigitated transducers, which are used in conductometric biosensors. The aim of the work is a deeper suppression of the error due to the influence of background changes in a solution when the parameters of a pair of transducers are not completely identical. The essence of the issue, the causes and mechanism of the resulting error, and possible ways to reduce it are considered. The structure and algorithms of operation of a computer biosensor system with an intelligent module of a differential conductometric channel based on an alternating current bridge, with balancing in absolute value and phase of the disequilibrium signal, are described. Methods have been developed for tuning such a bridge to a special quasi- equilibrium state, in which a change in the background electrical conductivity does not change its output informative signal. The results of experimental studies are presented.

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Features of Construction of Impedansometric Channels for Work at Low and Infrared Frequencies

Borchshov,

Brahynets,

Masiurenko

et al. 2024

Teh. elektrodin.

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The features of the low and infra-low frequency ranges of harmonic measurement signals, as well as the properties of the investigated objects, which must be taken into account during the construction of impedance measuring channels, are determined. To combine the necessary metrological characteristics of such channels (accuracy, speed, immunity), an approach is used, consisting in analog-to-digital conversion of signals received from sensors, and subsequent application of digital methods of their processing. Options for implementing this approach using digital methods for determining the amplitude of sinusoidal signals were considered and analyzed, among which the most promising ones were selected for metrological support of impedance measurements at low and infra-low frequencies. The perspective of using parallel-serial analog-digital conversion of an informative signal with its continuous integration at these frequencies is shown. Conclusions were made and recommendations were given regarding the use of the considered methods taking into account the properties of the measurement objects. References 16.

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Basic Measuring Module for Implementation of the High-Precision Devices for Determining the Impedance Parameters in a Wide Frequency Range

Cited by 3 publications

References 6 publications

Determining features in the application of redundancy for the thermistor cubic transformation function using computer simulation

Determining features in the application of redundancy for the thermistor cubic transformation function using computer simulation

Hardware and Software Complex for Conductometric Measurements With High Metrological Reliability

Features of Construction of Impedansometric Channels for Work at Low and Infrared Frequencies

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