This paper deals with the design of a vibration minigenerator and its power management electronics. The minigenerator is used as the independent energy source for wireless temperature sensors in NH-90 helicopters. The power management electronics is useful for this purpose as there exists interdependence between the generator output voltage instability and the helicopter vibrations instability.In this respect, it should also be proper to mention the necessity of applying the battery. Further, the presented article provides a description of two principles of the management electronics, namely the power factor corrector and the simple energy storage with a DC/DC regulator. It has been experimentally confirmed the minigenerator together with the electronics can save up to 52% battery energy according to the flight options with the used devices. Using the more efficient generator and electronics it should be up to 100% of the battery energy.

Summary This article presents the capability of methods for measuring of the air ion concentration and principles of ion spectral analysis methods. The analysis of the electric state of air shows the presence of various ion sorts. The therapeutic effect of negative high-mobility ions of proper concentration is known. This positive effect was observed in caves that are used for speleotherapy.

SummaryWe know active and passive methods of a location. This article deals only with a passive location of dynamic targets. The passive optics location is suitable just for tracking of targets with mean velocity which is limited by the hardware basis. The aim of this work is to recognize plasma, particles etc. It is possible to propose such kind of evaluation methods which improve the capture probability markedly. Suggested method is dealing with the short-distance evaluation of targets. We suppose the application of three independent principles how to recognize an object in a scanned picture. These principles use similar stochastic functions in order to evaluate an object location by means of simple mathematical operations. Methods are based on direct evaluation of picture sequence by the help of the histogram and frequency spectrum. We find out the probability of unidentified moving object in pictures. If the probability reaches a setting value we will get a signal. The processing of dynamic pictures and their filtration are a significant part of work. Static objects, background (trees, buildings) must be filtered off before. This filtration is being also done by means of the probability function. Probability distribution of an object position is gained from a sequence of more pictures.

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This article deals with physical and chemical processes during measurement with an inductive flowmeter. A theoretical model and an example of numerical solution are presented here. We prepared numerical models based on the combined finite element method (FEM) and the finite volume method (FVM) of one of the three variants and computed the output voltage of the flowmeter electrodes. The model joins the magnetic, the electric and the current fields, the flow field and a chemical nonlinear ion model. The results were obtained by means of the FEM/FVM as a main application in ANSYS software.