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In this paper a model of active noise control system for in situ applications is presented. The model is based on the multiprocessor OMAPL137 system on chip. Functionality of the OMAP-L137 is briefly discussed including hardware and software resources utilized to meet system requirements. Control algorithm using neural network and genetic algorithm is presented and validated by experimental tests. Source

In the article structure of a system for remote monitoring exposure to noise of workers using earmuffs and in this way its proper use is described. In this system for wireless data transfer a ZigBee network is utilized. Technical realization of ZigBee network is based on XBee modules working in 2,4 GHz frequency band. In the article purposes and construction of system components are described. © 2014, Wydawnictwo SIGMA - N O T Sp. z o.o. All rights reserved. Source

The paper presents the results of experimental investigation aimed at the assessment of lighting preferences of workers with moderately poor sight. Conduction of research was described, as well as, the method of assessment of eye fatigue, that consists of objective and subjective studies. The author presents the designed of lighting system that was the alternative for general lighting with parabolic louver during the research. Source

Pawlak A.,Centralny Instytut Ochrony Pracy | Zaremba K.,Bialystok Technical University
Przeglad Elektrotechniczny | Year: 2012

Indirect lighting in which the observer sees no directly light sources, is attractive both in terms of lighting and aesthetics. The problem is the low efficiency of this type of lighting. During the simulation tests of indirect lighting installations with the use of lighting programs noted significant differences in the results obtained. Analysis of results showed the limited usefulness of these programs to perform calculations of lighting indirect lighting installations. Source

This paper presents numerical analysis of the error of the measurement of the electric potential of electrostatic surface charge distributed on the thin dielectric plane. The virtual measurement was made with the field mill voltmeter, calibrated with metallic plate which electric potential was established in respect to the earthed filed mill voltmeter. Source

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