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PL
W referacie przedstawiono koncepcję oraz rozwiązania sprzętowe i programowe dwóch dydaktycznych systemów pomiarowosterujących, pozwalających na zdalną realizację zajęć laboratoryjnych w szkołach ponadpodstawowych i uczelniach technicznych z przedmiotów związanych z techniką sensorową.
EN
The paper presents the concept as well as hardware and software solutions of two didactic measurement and control systems allowing for remote implementation of laboratory classes in secondary schools and technical universities in subjects related to sensor technology.
PL
W pracy przedstawiono architekturę zaproponowanego i wdrożonego systemu pomiarowego do gromadzenia i prezentacji bieżących informacji na temat stanu wału przeciwpowodziowego. System cyklicznie gromadzi dane z czujników podłączonych do rejestratora danych, które ostatecznie są przesyłane do serwera. Na podstawie analizy zgromadzonych wyników pomiarów można dokonywać oceny stanu wału przeciwpowodziowego, a w razie wystąpienia nieprawidłowości system może generować odpowiednie alarmy.
EN
The article presents the architecture of proposed and implemented measurement system for collecting and presenting current information on the flood embankment condition. The system periodically collects data from sensors connected to the data logger, which are finally sent to the server. Based on the analysis of collected measurements, the condition of the flood embankment can be assessed, and in the case of any irregularities, the system can generate appropriate alarms.
EN
The main aim of the below presented work was to investigate the possibility of using impedance spectroscopy in the unpasteurized beer microbial contamination degree assessment. Advantages of the impedance spectroscopy method, a negligible number of similar published results as well as their practical aspect make the research important. Four different types of beers were investigated which were unfit for consumption due to improper storage and were heavily microbiologically contaminated. Their impedance was measured in the frequency range from 0.1 Hz to 1 kHz before and after centrifugation. Based on the measured values, an innovative electrical equivalent circuit was proposed and the parameters of the circuit elements were fitted. The obtained results show significant differences (23 up to 35%) in the values of resistance modelling the diffusion phenomenon. Such large changes, resulting from the removal of biomass from the samples, prove the validity of impedance spectroscopy in the study of the properties of unpasteurized beer. According to the authors, it would be possible to use the proposed methodology during the production of beer. With some limitations, it should aid in the early detection of microbial contamination.
EN
In the work a method of latency measurement in software defined radio (SDR) is proposed and validated. The test setup uses customer grade GNSS modules as reference time sources and enables relative delay calculation between signals received directly and those bypassed through SDR platform. The method is hardware agnostic in a sense, that it does not involve any custom software or hardware modifications. Tests that compare reported carrier-to-noise ratio and positioning errors were performed to prove functionality of such system. Additionally, authors measured several gnuradio blocks with respect to their impact on total latency introduced into signal path. All tests were performed on a bladeRF low-cost RF front-end. Minimum observed latency for the signal was below 10 ms.
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