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Elektrotechnika
Archiv článků od 6.11.2017 do 12.2.2019

Archiv recenzovaných článků

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20.11.2018
Ing. Jan Vidim, Domat Control System s.r.o.

The "size" of the control system has a significant impact on how individual actors in the supply chain - investor, designer, salesman and implementation technician or programmer - are approaching it. But how do you determine the size - and how do you define it at all? In terms of measurement and regulation, we can highlight two main factors: range and complexity.

18.9.2018
Věra Kubátová, skupina Energon

Unique charging station for electric vehicles was opened in february at the Prague Fair Grounds. The project combines recharging of electric vehicles with other functions: by producing their own energy using roof photovoltaics and by regulating overvoltage or undervoltage of the surrounding network using a battery system.

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13.8.2018
doc. Ing. Jiří Brožovský, CSc., VUT Brno, Ústav technologie stavebních hmot a dílců

Results of the measurement ultrasonic pulse method are influenced by numerous factors. The influence of humidity and the method of sounding, direct and semi-direct on the measurement results was monitored. The influence of moisture and the method of transmission the bricks influences the measurement results by varying degrees. The least is influenced by the results of measurements on calcium silicate bricks and, on the contrary, on clay bricks made of plastic dough. Here shows synergistic effects of the state structures and defects in the head.

16.7.2018
Ing. Jan Říšský, JOHNSON CONTROLS INTERNATIONAL, spol. s r.o.

A brief overview of the history and development of thermostats. Since the first discovery of properties of the bimetal to the present, when the thermostat does much more than just control the heat source.

25.6.2018
prof. Ing. Josef Chybík, CSc., VUT Brno, Fakulta architektury

It is expected that the new administrative centre of Lesy České republiky would be an exemplary demonstration of the use of wood, which will be used in the form of the building material or in which the importance of wood will be emphasized in another appropriate way. The paper is focused on a proposal that won the international architectural competition in 2016.

28.5.2018
Bc. Jiří Vastl

The thesis is focused on smart metering system and ripple control. The first theoretical part describes function of ripple control. The second theoretical part presents smart metering technology with introduction of a new system of energy settlement. The new system of energy settlement use prices in the intraday market which are published on Electric grid operator’s website. The system can be considered as a dynamic tariff. The system of energy settlement is demonstrated on consumption of the family house. The comparison of both systems is demonstrated in the final part of the thesis.

23.4.2018
Michal Randa, redakce

The basic milestone in the post-revolutionary development of alarm monitoring was the development of telecommunications and the gradual liberalization of the market. The changes that we have experienced in the period after 1989, however, only followed the ongoing global trend. Trend, the beginning of which can be found during the Industrial Revolution, specifically in II. the 19th century, when the term telecommunication appeared in the territory of Bohemia, Moravia and Silesia.

23.4.2018
Ing. Lukáš Velebil, Ing. Jan Včelák, Ph.D., Ing. Kristýna Čápová, Ing. Milan Dvořák

The paper deals with the experimental analysis aimed at function verification of fiber optic sensors (Fiber Bragg Gratings). The sensors are used for mechanical stress measurement in wooden load-bearing structures. Glued laminated timber beam with built-in fiber optic sensor system was mechanically loaded during two bending tests. The data obtained using the fiber optic sensors were compared with the results of reference measurement method and analytical calculation.

9.4.2018
Milan Markovič, Facility manager

The article explains some basic terms and obligations in the field of fire protection related to the activity and character of the association of owners of flats (or housing cooperatives) and ensuring fulfillment of obligations in the field of fire protection.

19.3.2018
Ing. Tomáš Mikula

It is taken as given that fire safety rules for buildings do not concern those who install electric devices that are not for fire protection. But that is a big mistake. Fire safety rules for buildings concern everybody who is in an interaction with the building in any way. And lightning protection is disregarded as well.

5.2.2018
Michal Randa, redakce

Most of the companies that benefit from their history of so-called "commercial security" base their business on the knowledge of legislation and they are aware of the importance of ČSN for their business. But closer attention should be given by those who see security as mere business.

5.2.2018
Ing. Ayodeji Omishore, doc. Ing. Miloš Kalousek, Ph.D., Petr Mohelník

A light pipe prototype with a concentrating mirror parabolic head was tested for temperature profiles under solar radiation. The purpose of the testing is to find maximal temperature and estimate potential risks with overheating in the position of the pipe installation into roof structures and materials.

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5.2.2018
Ing. Karel Mrázek

The article deals with the economic assessment of energy saving measures as a further continuation of the topic of reconstruction of HVAC systems in apartment buildings. Selection of economical lifespan for selected elements and functional parts with preventive maintenance costs is provided. Finally, an example of the apartment building evaluation is given.

© M-Rido - Fotolia.com
22.1.2018
Ing. Alena Horáková

The first article of the series on energetic reconstruction HVAC systems in residential buildings is focused on the preparation of project with minimum necessary information that should be prior to any commencement reconstruction. In current practice this part is significantly neglected.

8.1.2018
Ing. Tomáš Mikula

In the media, the issue of ICT convergence with other fields is mainly described only from a technological point of view. The practical impact on designing and designing buildings is however no longer mentioned. How do you perceive the words project and project documentation you?

25.12.2017
Michal Randa, redakce

The security services of centralized surveillance appeared in our country in the 1970s. In today's article we will return to the area of ​​alarm and security systems using the permanent exhibition of the Police Museum of the Czech Republic.

6.11.2017
Ing. Michal Lom, prof. Ing. Ondřej Přibyl, Ph.D.

This article describes the basic principles of Internet of Things and deals in detail with the types of networks for Internet of Things in the Czech Republic and their advantages and disadvantages.


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