The article presents the influence of the camera and its optical system on the uncertainty of object position measurement in vision systems. The aim of the article is to present the methodology for estimating the combined standard uncertainty of measuring the object position with a vision camera treated as a measuring device. The identification of factors affecting the location measurement uncertainty and the determination of their share in the combined standard uncertainty will allow determining the parameters of the camera operation, so that the expanded uncertainty is as small as possible in the given measurement conditions. The analysis of the uncertainty estimation presented in the article was performed with the assumption that there is no influence of any external factors (e.g., temperature, humidity, or vibrations).
The electrical power drawn by an induction motor is distorted in case of appearance of a certain type of failures. Under spectral analysis of the instantaneous power one obtains the components which are connected with definite types of damage. An analysis of the amplitudes and frequencies of the components allows to recognize the type of fault.
The paper presents a metrological analysis of the measurement system used for diagnosis of induction motor bearings, based on the analysis of the instantaneous power. This system was implemented as a set of devices with dedicated software installed on a PC. A number of measurements for uncertainty estimation was carried out. The results of the measurements are presented in the paper. The results of the aforementioned analysis helped to determine the measurement uncertainty which can be expected during bearing diagnostic measurements, by the method relying on measurement and analysis of the instantaneous power of an induction machine.
The paper presents the methodology for estimating uncertainty of a voltage transducer conversion function based on the example of LEM CV 3-500 transducer. The analysis was performed using the method based on the GUM Guide propagation of uncertainty law and the Monte Carlo numerical method. The article also presents a comparative analysis of the results of a voltage measurement evaluation done using the Monte Carlo simulation method, and results obtained with the use of the propagation of uncertainty law method, for a few selected voltage and frequency values. Streszczenie. W referacie zaprezentowano metodologię szacowania niepewności funkcji przetwarzania przetwornika napięciowego, na przykładzie przetwornika LEM CV 3-500. Analizę przeprowadzono przy wykorzystaniu metody opartej na Przewodniku GUM z zastosowaniem prawa propagacji niepewności oraz metody numerycznej Monte Carlo. W artykule przeprowadzono także analizę porównawczą wyników oceny pomiaru napięcia metodą symulacji Monte Carlo oraz wyników uzyskanych metodą związaną z prawem propagacji niepewności, dla kilku wybranych wartości napięcia oraz częstotliwości. (Szacowanie niepewności funkcji przetwarzania przetwornika napięciowego na przykładzie przetwornika LEM CV 3-500).
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