Wyniki wyszukiwania - BazTech

1

Nowe narzędzia do inspekcji, diagnostyki i oceny istniejących obiektów mostowych

Rakoczy Anna M., Karwowski Wojciech, Ribeiro Diogo, Santos Ricardo, Cabral Rafael

Mosty

|

2023

|

nr 4

40-45

PL

W niniejszym artykule przedstawiono najnowsze kierunki w zakresie zdalnych inspekcji konstrukcji mostowych. Zaprezentowano zestawienie najnowszych technologii stosowanych do inspekcji opartych na komputerowych systemach obrazowania i innych systemach bezkontaktowych (w tym LiDAR, termowizja) instalowanych w bezzałogowych statkach powietrznych (UAV) i pojazdach naziemnych.

EN

Recent scientific and technological advancements have enabled a more efficient structural condition assessment of bridges, mainly through the implementation of intelligent inspection strategies. These intelligent strategies can prevent the failure of critical components in advance as well as identify mitigation actions to avoid future failures. The latest inspection technology can provide inspection plans with damage conditions, create a damage report as well as provide statistics and comparisons to the previous inspection findings. The new and existing inspection technologies are directed to facilitate the digitalization of the Bridge Management System (BMS). The complexity of maintenance/ inspection requires organised, automated, open, and transparent digital processes, which should consider both structure and asset management data. Furthermore, the inspection/monitoring findings serve as a source for decision-making models. The digitalised aspects of autonomous inspection provide better performance prediction models and guarantee safety for the users. This paper presents the latest findings in the field of remote inspection of bridges. In particular, the main technologies for inspection are depicted, especially those based on computer vision systems installed in UAVs and robots, LiDAR, radar, satellites, and other non-contact systems including onboard monitoring.

2

Satelity teledetekcyjne odwracające wzork

Ziemnicki Paweł

Geodeta : magazyn geoinformacyjny

|

2023

|

nr 5

42--46

3

Nasze plejady

Królikowski Jerzy

Geodeta : magazyn geoinformacyjny

|

2023

|

nr 2

48--50

4

Using electrical capacitance tomography system for determination of liquids in rocket and satellite tanks

Gut Zbigniew

Transactions on Aerospace Research

|

2020

|

Nr 1 (258)

18--33

EN

One of important problems in aerospace engineering is to determine the amount of fluid in the tank in a microgravity environment. There are several methods for doing it, however, there are no proven methods to quickly gauge the amount of propellant in a tank in low gravity conditions. New and more accurate methods of such a measurement are being continually searched for. One of interesting solutions is using Electrical Capacitance Tomography (ECT) for this purpose. The article presents both numerical analysis and experimental test results using a spherical tank. The main purpose of the simulation was to determine the effect of the number of electrodes and noise signal level on the quality of reconstruction images. In numerical simulations, different models of dielectric permittivity distribution have been reconstructed. On the basis of numerical simulations, a 24-electrode sensor was designed and made. In experimental tests, different distribution of medium inside the spherical tank was investigated. The results show that the method can directly measure the mass of fuel in the tank, as well as it allows for a visualization of fuel distribution, independent of the tank position in space, and the liquid-propellant system will be used.

PL

Istotnym problemem w inżynierii kosmicznej jest sposób określenia ilości paliwa w zbiorniku w środowisku mikrograwitacji. Istnieje kilka metod określania poziomu cieczy w zbiorniku, jednakże nie ma sprawdzonych metod szybkiego pomiaru ilości paliwa w zbiorniku, gdy znajduje się on w stanie niskiej grawitacji. Trwają poszukiwania nowych i dokładniejszych metod pomiaru. Jednym z ciekawszych rozwiązań jest zastosowanie Pojemnościowej Tomografii Komputerowej do określania poziomu paliwa lub utleniacza w zbiornikach rakiet i satelitów. Otrzymane wyniki, które przeprowadzono z wykorzystaniem metod numerycznych oraz w warunkach grawitacji pokazują, że metoda może bezpośrednio mierzyć masę paliwa w zbiorniku, a także umożliwić wizualizację rozkładu paliwa, niezależnie od położenia zbiornika w przestrzeni i zastosowanego układu zasilania.

5

Wsparcie informacyjne Marynarki Wojennej przez nowoczesne technologie rozpoznawcze

Zarychta S., Szumielewicz K.

Rocznik Bezpieczeństwa Morskiego

|

2016

|

R. X cz. IV

303--323

EN

Over the past decade, the Polish Navy (PNY) has undergone an extraordinary transformation of the intelligence surveillance and recognition (ISR) technologies which are currently regarded as significant suppliers of tactical and operational information. Due to the fact that, the Polish Navy are considering purchase of an advanced sorts of Signals Intelligence (SIGINT), Electronic Intelligence (ELINT), Imagery Intelligence (IMINT) and Acoustical Intelligence (ACINT) systems in the future, this article presents the new ISR capabilities which should provide PNY with the ability to identify, and track a broad spectrum of potential threats within the maritime domain.

6

Spacecraft manufacturing implications for volume production satellites

Wade D., Weich C.

Research Bulletin / Warsaw University of Technology, Institute of Aeronautics and Applied Mechanics

|

1999

|

nr 9

171-178

EN

To date, practically all spacecraft development programmes have followed a trend of ever increasing size, complexity, mass and cost. Today's missions may typically result in a spacecraft which has a mass at launch of the order of 10000 kg and a cost of around $150 million. Over the past ten years the emergence of the 'small satellite', with a mass of less than 1000 kg, has in part, reversed this trend, albeit whilst in many cases, employing the same design and manufacturing approach used for their conventional counterparts. Both conventional and small satellites have design and manufacture implications resulting from the conflicting low production quantities and high reliability requirements. Even series satellites tend to undergo significant redesign work for particular mission requirements resulting in the retention of high costs. Attempts to lower costs to date have centred on the use of modularity and 'off-the-shelf designs, which have had some success, particularly in the arena of small satellites. Proposals for new spacecraft applications, such as global mobile communications, require the use of satellite constellations. The size of a constellation is dependant upon its application, however present concepts range from 20 to 850 satellites . Many of these proposals suggest the use of existing spacecraft development methods. However, other methods, not currently associated with spacecraft design, may lead to significant cost reductions, whilst maintaining a sufficiently high level of reliability and redundancy. Two programmes which have already tried to adopt some of these methods are Iridium2 and Globalstar2, which will borrow ideas from the automobile industry in the manufacture of the 72 and 56 satellites (including in-orbit spares) required for the respective constellations. This paper will outline some of these new methods, describing factors which will be of primary importance in the future development of constellation satellites if an entirely new low cost approach is to be developed. These include the impact and importance that computer aided engineering will have across the manufacturing activities, embracing design, production, simulation and test. as well as integration and testing procedures, component classification and even configuration control.

7

Nowe systemy telefonii satelitarnej

Dudek Z.

Przegląd Telekomunikacyjny + Wiadomości Telekomunikacyjne

|

1998

|

nr 9

649-655

PL

Przedstawiono aktualne perspektywy uruchomienia w tym roku i następnych latach kilku systemów telefonii satelitarnej. Opisano w zarysie ważniejsze systemy, które będą oddane do eksploatacji w ciągu najbliższych trzech lat.

EN

The updated survey of the advances in the constructions of satellity telephone systems is presented. The features of the few systems that are to start coming within next three years period are described.