Peter Sevcík

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This paper discusses supercapacitor based power unit for event-driven wireless sensor network node. In such nodes, most of the energy is consumed when transmitting or receiving data. Sleep-wake scheduling mechanism is an effective way how to prolong node's lifetime. However, this mechanism can result in delays because a transmitting node has to wait until(More)
Indoor environment is from the point of the wireless communication an extremely hostile environment. Despite this fact, wireless sensor network applications in the indoor environment are very common. Having signal propagation in a real environment, without considering interferences from other sources, we meet (not only indoors) four basic phenomenons -(More)
In control applications, we often come into contact with systems that response at the change of control signal by oscillations on systems output. These vibrations are unwanted and for their elimination different techniques are used in practice. The most commonly used techniques include PID regulation, frequency filtering and input shaping. This paper is(More)
In this paper, we propose voltage converter with high efficiency over wide input voltage. This converter is suitable for the solar panel for WSN applications where the only power source is a solar cell that outputs highly variable voltage. The aim is to achieve this by using multiple converter topologies in parallel. Use of such converter has a meaning in(More)
Application scenarios of WSN implementations are really broad. Due to their typical characteristics, such advantageous power consumption, wide communication coverage and relatively broad sensing possibilities, many application fields can be covered. In this paper, the problematic of power metering is targeted. Places with shared power sources, where(More)
—Global warming is big issue of this time. It is caused by producing emissions, mainly carbon dioxide. Many organizations tries to establish restrictions to limit CO 2 emissions. Our aim is to monitor underground parking lots and detect level of carbon dioxide using wireless sensor network. Gained results are drawn in the map of pollution of monitored area.