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The contribution is about time dependent low (<1nA) current measurements. The need of processing low level current signals arises in many areas of industry and research, particularly in optoelectronics. The processing starts with current-to-voltage conversion, because voltage signal can be transmitted and processed more easily than a weak current signal. Different possible technical solutions for...
Praca przedstawia wpływ lokalizacji nadajnika systemu komunikacji bezprzewodowej pracującego przy standardowej częstotliwości f=2,4 GHz oraz oddziaływanie konstrukcji budowlanej na rozkład pola elektromagnetycznego wewnątrz części budynku. Artykuł zawiera dyskusję dotyczącą zjawisk fizycznych związanych z propagacją fali elektromagnetycznej w złożonych konstrukcjach zawierających beton zbrojony lub...
Artykuł prezentuje podstawy teoretyczne techniki termowizyjnej i jej zastosowania w inżynierii środowiska w oparciu o przegląd literatury krajowej i zagranicznej. Zawarte w pracy badania własne wykonane kamerą termowizyjną o matrycy 384 x 288 pixeli i rozdzielczości 0,08 K dotyczą pomiarów w podczerwieni budynków wielorodzinnych i służą ilustracji opisywanych zagadnień.
In this paper, review of selected thresholding algorithms with focus on their use in radiological inspection of welded joints is presented. Described algorithms' parameters are optimized to improve defect visibility. Tests with use of shipbuilding industry radiographic images are carried out and described. Also, comparison of discussed algorithms is presented and their suitability for the use analysed.
Paper presents the description of research on two - phase gas - liquid flows. The research was inspired by the necessity of developing a new method for recognition of tested flows. In the beginning, there is a presentation of two - phase gas - liquid flows and special hydraulic installation where flows are created, next there is a description of the computer vision system which was created to research...
This paper dedicated to design of systems based on liquid crystal materials and fluorescent dyes. These systems provide fluorescence process in the wavelength range, which correspond to the three basic colors, of which formed the image in color display.
In this paper was presented coupling BEM and Set Level methods for identification of unknown shape of interface in electrical impedance tomography (EIT). It's shown how determinate velocity, how extend it, how use it to move interface and finally how to reset level function.
This paper deals with the surge voltage propagation in the transformer winding. The model with non-homogenous parameters is tested and an influence of a various voltage signal studied. The model is based on a circuit with distributed parameters and a non-correct circuit is eliminated. Illustrative examples show the current time-space distribution in the transformer winding for two cases. The first...
The study aims at comparing and presenting alternatives methods of breast cancer detection when compare with the mammography. A brief description and the physical basis underlying microwave tomography, optical tomography, galactography, termography and mammoscintigraphy have been done.
The active infrared thermography, using microwaves as the external energy source is a relatively new NDT technique. Differences in electric and thermal properties of materials allow to detect the examined specimens' "defects". In this paper, the above method's application to landmines' detection will be considered. The experimental setup has been optimized to obtain better performance of...
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