Politechnika Rzeszowska im. Ignacego Lukasiewicza


Politechnika Rzeszowska im. Ignacego Lukasiewicza

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Budzik G.,Politechnika Rzeszowska Im. Ignacego Lukasiewicza | Kozik B.,Politechnika Rzeszowska Im. Ignacego Lukasiewicza | Cieplak M.,CC METAL Science
Diagnostyka | Year: 2015

This paper presents a universal stand to diagnose air gear models made in the process of Rapid Prototyping (RP) at the production stage. The stand is designed in an open system, powered by a three-phase electric motor with a power of 0.75 kW, whose speed is controlled by a single-phase inverter. The stand is equipped with two measuring shafts, connected directly to a recorder RMC that allow you to read values torque and rpm in real time. Between this measuring shafts installed a gear reducer to allow the exchange of tested pair of gears. Powder brake with variable speed control is installed on the output as a load. Responsible for data acquisition software is copyright RMC-M-Monitor, which allows you to preview the results of measurements and print them in a report. Trials conducted on the universal test stand for air gears demonstrators give reproducible, stable work parameters and thus enable to obtain uninterrupted, accurate measurements.

Rak J.R.,Politechnika Rzeszowska im. Ignacego Lukasiewicza | Piegdon I.,Politechnika Rzeszowska im. Ignacego Lukasiewicza | Homa K.,Politechnika Rzeszowska im. Ignacego Lukasiewicza
Journal of Konbin | Year: 2013

In this study the methodology of balancing water needs in a crisis situation was presented. The example was done for city of Rzeszow. The municipal infrastructure: water supply system, sewage system, gas network, heating and energy systems was shortly characterized. The research undertaken in this study was related to Systemic Crisis Management and protection of the inhabitants of the city. The balance of emergency water supply Rzeszow in drinking water for the 29 neighborhoods of the city was shown.

Tchorzewska-Cieslak B.,Politechnika Rzeszowska im. Ignacego Lukasiewicza | Pietrucha-Urbanik K.,Politechnika Rzeszowska im. Ignacego Lukasiewicza | Szpak D.,Politechnika Rzeszowska im. Ignacego Lukasiewicza
Journal of Konbin | Year: 2016

The paper presents issues related to risks associated with the operation of small water supply systems on the background of water consumer safety assessment made on the basis of risk analysis. Definition of water consumer safety loss as a risk associated with the water consumption of poor quality or water lack was proposed. For this purpose, a three-parameter matrix is implemented with the parameters of the probability of a representative accident scenario, the losses of the water consumers and their protection. Risk management, together with the implementation of protective barriers of small water supply system against threats is a fundamental condition for the continued operation of the system. © 2016 Barbara Tchórzewska-Cieślak et al., published by De Gruyter Open.

Results of errors of the engineering-geological reporting, arisen at the building plan stage, for the sky slope in Przemyśl have been presented in this paper as well as verification of engineering-geological reports and change of foundations method of engineering objects designed to develop the ski slope.

Skoczylas M.,Politechnika Rzeszowska Im. Ignacego Lukasiewicza | Kamuda K.,Politechnika Rzeszowska Im. Ignacego Lukasiewicza | Jankowski-Mihulowicz P.,Politechnika Rzeszowska Im. Ignacego Lukasiewicza | Kalita W.,Politechnika Rzeszowska Im. Ignacego Lukasiewicza | Weglarski M.,Politechnika Rzeszowska Im. Ignacego Lukasiewicza
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2014

The properties of energy conditioning electrical circuits that are developed for powering additional functional blocks of autonomous RFID transponders working in the HF band have been analyzed and presented in the paper. The concept of autonomy is realized by implementing extra functions in the typical transponder. First of all, the autonomous system should harvest energy, e.g. from the electromagnetic field of read/write devices but also the possibility of gathering information about environment should be available, e.g. by measuring different kind of physical quantities. In such an electrical device, the crucial problem consists in energy conditioning because the output voltage-current characteristic of an front-end (antenna with matching and harvesting circuit) as well as the total and instantaneous power load generated by internal circuits are strongly dependent on a realized function but also on energy and communication conditions in the RFID interface. The properly designed solution should improve harvesting efficiency, current leakage of supply storage, matching between antenna and input circuits, in order to save energy and increase operating time in such a battery-free system. The authors present methods how to increase the autonomous operation time even at advanced measuring algorithms. The measuring system with wide spectrum of sensors dedicated for different quantities (physical, chemical, etc.) has also been presented. The results of model calculations and experimental verifications have been also discussed on the basis of investigations conducted in the unique laboratory stand of object navigation systems. © 2014 SPIE.

Politechnika Rzeszowska Im. Ignacego Lukasiewicza and Warsaw University of Technology | Date: 2013-08-21

The subject of the invention is the method of manufacturing the modifiers of liquid epoxy resins and using them to reduce flammability of the products obtained from the said resins in the environment-friendly way and improving their mechanical properties. The method of preparing the modifiers of liquid epoxy resins according to the invention involves dissolution of an alkyl or aryl derivative of aluminum phosphate in aliphatic polyamine, preferably at the molar rate of 0.1:30 at temperature 20 to 130C, while, preferably, keeping the system under nitrogen should the temperature be above 60C, followed by filtering the product. The resulting solution is introduced, as a modifier, into low-molecular-weight epoxy resin of epoxide number of 4 to 6 mol/kG in the amount of 10 - 14 wt.%, while effectively mixing until the components form a clear mixture and the said mixture is cast into suitable molds and left to harden at room temperature for at least 20 hrs., followed by post-cure at 80 to 100C, preferably at 100C, for another 3 to 6 hrs.

Poznan University of Technology, Adam Mickiewicz University and Politechnika Rzeszowska Im. Ignacego Lukasiewicza | Date: 2015-06-24

A polyoxymethylene composite with a reduced formaldehyde emission contains between 0.01 and 10 wt%, advantageously between 0.2 and 0.9 wt%, of silsesquioxane derivatives of diverse spatial structures and the general chemical formula of ((RSiO_(1,5))_(n)(R^(1)SiO_(1,5))_(8-n))_(m), in which R represents an amine group (NH_(2)) or a diaminoethyl group (NH_(2)CH_(2)CH_(2)NH) bound to a silicon atom with an alkyl chain of 2-8 carbon atoms, R^(1) represents a methyl, ethyl, isobutyl, isooctyl, cyclohexyl, cyclopentyl or phenyl group, n and m are natural numbers, n can assume values from the range between 1 and 8 and m can assume values from the range between 1 and 100.

Politechnika Rzeszowska Im. Ignacego Lukasiewicza | Date: 2014-04-01

Twist drill bit for drilling composite materials, especially through-hole drilling, wherein the blade (3) formed at the upper part of the drill bit has two stepsthe initial (4) and the finish one (5), wherein the length (l_(w)) of the cylindrical part of the initial step (4) is at least 0.5 mm, and its first diameter (d_(W)) is shorter than the second diameter (d_(p)) of the finish step (5) by 0.5-2 mm, whereas the point angles ( and ) of the initial step (4) and finish step (5) range from 60 to 90.

Politechnika Rzeszowska Im. Ignacego Lukasiewicza | Date: 2015-08-26

The subject of the invention is a method of modifying bentonite which is used especially as a filler of polymer resins and a method of application of a modified bentonite to polymer resins. A method of modification of bentonite lies in the fact that into a mixer of the granular products, preferably a drum mixer of type V, what is added at 20 - 30 C is a finely divided bentonite with a grain size of less than 0,006 mm and from 28 to 35 g comminuted to a grain size of not more than 0,006 mm modifier per 100g of bentonite, as the bentonite modifiers the following were used: quaternary ammonium salts with four aliphatic substituents or with one benzyl or phenyl and 3-alkyl: ethyl, butyl, or a radical of the longer-chain and / or quaternary phosphonium salts of the three aromatic substituents: phenyl or benzyl, and one alkyl: ethyl, butyl or longer-chain radicals, as well as derivatives polyhedral oligomeric silsesquioxane (POSS): oktakis (tetramethylammonium)-octasilsesquioxane or oktakis {3 - (N-(hydroxyethyl)-dimethylamino) propyl}-octasilsesquioxane or aminopropylisobutyl octasilsesquioxane, mixing process is carried out using a rotational speed of 35 to 451/min during 8-14 hours. A method of application of the modified bentonite to polymer resins according to the invention lies in the fact that the modified bentonite is introduced in an amount of 0.1-10,0 g, preferably 1-4 g, and 100 g of a liquid epoxy resin or a polyester or polyurethane, and then the mixture is homogenized with resin by multistage stirring: for premixing with a low-speed mechanical stirrer at a stirrer speed of 100 - 200 1/min, to full wetting, then, using an ultrasonic homogenizer at a temperature of 40-60oC for at least 10 min and subsequently with a high shear mixer 1/min 6000-10000 during 15-30 min, preferably under reduced pressure in a homogenizer of the cylinder-type in the cylinder at high shear providing a rotational speed of 3000-6000 1/min for 15-25 min..

Politechnika Rzeszowska Im. Ignacego Lukasiewicza | Date: 2016-11-09

Mobile window insulation in the form of blinds, preferably horizontal or vertical, made of strips 3 with rotation ability up to 90 in both directions 9 vs. the longitudinal axis of the strip, where the inside of the strip 3 enclosures a filling 5 of phase change material (PCM) of organic origin, with phase change heat value of 90-230 kJ/kg and phase change temperature (solid body - fluid) in the range of 17-25C. Change phase materials (PCM) were selected out of: the esters of carboxylic acids, preferably the ester of palmitic acid and propanol and/or mixtures of saturated fatty acids, preferably the mixture of caprylic and lauric acid and/or PEG600 ethylene glycol polymere and/or the mixture of alkanes.

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