Wyniki wyszukiwania - BazTech

1

Study of influence of measuring system parameters to the value of active and reactive component of the substance electrical conductivity

Gonsor O., Tomasik M.

ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes

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2017

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Vol. 6, No 1

31--36

EN

Electrical conductivity is an important electrical parameter of the substance, by which you can identify its quality characteristics. Determining the admittance of the substance is crucial. Admittance of the substance as an active element depends on its chemical composition, temperature, voltage that is applied to the measuring circuit and the frequency of the measuring signal. In this regard, it is advisable to carry out a series of experimental tests to determine the effect of these parameters on the admittance of the substance. The object of research is water from different sources of centralized drinking water supply. For theoretical analysis of admittance, water is seen as a multi-element two-terminal, placed in the electric circuit of alternating current. To reduce the methodological error, active and reactive components of electrical conductivity were researched in different frequencies ranges (from 50 Hz to 100 kHz). Investigation of the temperature dependence showed that the active and reactive components of the electrical conductivity are temperature dependent, but the reactive component is less sensitive to change. The dependence of the admittance of the frequency at different levels of the test signal is investigated. The article presents the graphical specification of changing admittance at the change of frequency, at different levels of the test signal. Also, the dependencies of active and reactive components were studied of the electrical conductivity of drinking water from changing test signal U at different frequencies.

2

Investigation of correlation measuring method accuracy for two types of test signals

Gavriljuk V., Rybalka R., Bezrukov V.

Transport Problems

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2008

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T. 3, z. 4

33-38

EN

On the base of developed computer simulation program the comparative investigations of correlation measuring method accuracy with two types of test signals have been provided.

PL

Porównawcze badania dokładności metody pomiaru korelacji dla dwóch rodzajów sygnałów próbnych zostały przedstawione na podstawie opracowanego programu symulacji komputerowej.

3

Shape of increasing pulse leading egde in the time domain as a determinant of its spectrum

Ruszel P.

Elektronika : konstrukcje, technologie, zastosowania

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2008

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Vol. 49, nr 2

42-44

EN

This paper focuses in short on results analysis related to influence of the pulse leading edge shape of the voltage signal, determined in the time domain, on the shape of the envelope of its image in the frequency domain. Emphasis has been put on the possibilities of limiting the spectral lines contents of the signal frequency spectrum in the range of high frequencies and the possibilities of their level diminishing. Additionally, the paper describes a method of "constructing (shaping) test signal" which application enabled measurement of spectrum of a chosen active state of a tested electric switch.

PL

Zaprezentowano w skrócie wyniki analizy wpływu kształtu czoła sygnału impulsu napięcia, określonego w dziedzinie czasu, na kształt obwiedni jego obrazu w dziedzinie częstotliwości. Zwrócono uwagę na możliwość ograniczenia zawartości składowych widma częstotliwości sygnału w zakresie wielkich częstotliwości oraz zmniejszenia ich poziomu, jak również wskazano na jeden ze sposobów osiągnięcia tego celu.

4

Nowy sposób projektowania uniwersalnego modułu do samotestowania układów hybrydowych

Jarmolik W., Gruszewski M.

Elektronika : konstrukcje, technologie, zastosowania

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2001

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Vol. 42, nr 4

26-28

PL

W artykule przedstawiony jest nowy sposób projektowania uniwersalnego modułu do samotestowania układów hybrydowych (mixed-signal), który pozwala wytwarzać szeroki zakres sygnałów testowych i analizować odpowiedzi testowanych układów z wysokim stopniem wiarygodności. Przedstawione podejście oparte jest na wykorzystaniu stochastycznego integratora, który jest podstawowym elementem uniwersalnego modułu. Dodatkowo praca zawiera zwięzły opis podstawowych sygnałów testowych, schematy blokowe układów do wytwarzania przedstawionych sygnałów i sposoby analizy wyników testowania.

EN

The article presents a new design of the universal module necessary to obtain the mixed-signal units. The mixed-signal units allow to construct the wide extent of test-signals and analyse the response of evaluated components with a high credibility. The presented approach is based on idea of the stochastic integrator; an essential constituent of the universal module. Additionally, the writing includes the brief description of major test-signals and block-unit plans required to develop the signals characterized above. The work also proposes several ways of analysis of the final test results.