Wyniki wyszukiwania - BazTech

1

Termowizja i drony

Dozór Techniczny

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2023

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z. 6

24--25

PL

Amerykański producent dronów Skydio wykorzystał technologię termowizyjną programu FLIR do stworzenia doskonałego ładunku w podczerwieni długofalowej z zastosowaniem modułu kamery termowizyjnej Boson+.

2

Polyurethane shape memory polymer: structure characterization and estimation of energy storage and dissipation during the tension process

Staszczak Maria, Gradys Arkadiusz, Golasiński Karol, Pieczyska Elżbieta A.

Bulletin of the Polish Academy of Sciences. Technical Sciences

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2023

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Vol. 71, nr 6

art. no. e147343

EN

Shape memory polymers (SMP) are new multifunctional materials raising increasing interest in various functional applications. Among them, polyurethane shape memory polymers (PU-SMP) are particularly attractive due to their combination of shape memory, high strength and biocompatible properties. Developing new applications for PU-SMP requires comprehensive research on their characteristics. This work involved investigating the structure and mechanical behavior as well as characterizing the energy storage and dissipation of a thermoplastic PU-SMP with a glass transition temperature (Tg) of 25_C during tensile loading-unloading. The process of energy storage and dissipation in the PU-SMP was investigated based on the stress-strain curves recorded by a quasi-static testing machine and the temperature changes, accompanying the deformation process, obtained by using a fast and sensitive infrared camera. The results showed that the thermomechanical behavior of the examined PU-SMP depends significantly on the strain rate. At a higher strain rate, there are higher stress and related temperature changes, which lead to greater energy dissipation. However, the energy storage values estimated during the deformation process turned out to be not significant, indicating that the work supplied to the PU-SMP structure during loading is mainly converted into heat. It should also be noted that the structural investigation revealed no crystalline phase in the investigated PU-SMP.

3

Investigation of Heat Transfer in Seersucker Woven Fabrics using Thermographic Method

Zgórniak P., Matusiak M., Frącczak L.

Autex Research Journal

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2022

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Vol. 22, no. 3

282--289

EN

Seersucker woven fabrics are characterized by unconventional structure and surface topography. Their crucial feature is a three-dimensional puckered effect created by puckered and flat strips occurring in the warp direction. Such a structure influences the basic mechanical and utility properties of the fabrics. The aim of the presented work is to analyze the heat transfer in seersucker woven fabrics. Measurement of the heat transfer was done using an infrared camera. Thermograms created for different seersucker woven fabrics, as well as for flat and puckered areas of the seersucker woven fabrics, were analyzed from the aspect of heat exchange between a hot plate and the environment through the fabric. The results showed that the linear density of the weft yarn influences the heat transfer through seersucker woven fabrics. The results allowed the comparison of the heat transfer through the seersucker woven fabrics in both flat and puckered areas. The investigations performed confirmed that the thermographic method can be applied to complex analyses of the heat transfer through seersucker woven fabrics.

4

Chip Temperature Measurement in the Cutting Area During Rough Milling Magnesium Alloys with a Kordell Geometry End Mill

Kuczmaszewski Józef, Zagórski Ireneusz, Zgórniak Piotr

Advances in Science and Technology. Research Journal

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2022

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Vol. 16, no 2

109--119

EN

The paper presents the results of measurements of chip temperature in the cutting zone during milling. The main aim of the research was to record and compare the maximum chip temperature in consecutive frames of thermal images. An additional goal may be the influence of changes in technological parameters on the temperature of the chips in the cutting zone. Two grades of magnesium alloys were used for the tests: AZ31 and AZ91HP. The research used a carbide milling cutter with an additional chip breaker, dedicated to effective roughing of light alloys. These tool geometries can assist in the high-performance machining of magnesium alloys by efficiently splitting the chip and consequently reducing friction in the machining zone. This can reduce the cutting area temperature. The results of the research work were showed as exemplary "time" charts, box-plot charts and a summary table, which additionally included an error analysis of the measurement method. On the basis of the tests and measurements performed, it can be concluded that despite the observed chip fragmentation, the obtained temperatures can be defined as the so-called safe milling areas. During the machining tests, the risk of chip ignition during machining was not observed, also the characteristic melting points, which clearly indicates the safety of the milling process of these alloys. It has been observed that with the increase of vc and fz, there was no increase in the maximum temperature of the chip in the cutting area. This situation only occurs when increasing ap.

5

Wykrywanie zagrożeń w instalacjach fotowoltaicznych oraz innych urządzeniach elektrycznych za pomocą termowizji

Kuczyński Karol

Elektro Info

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2021

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nr 11

70--74

PL

W artykule omówiono warunki wykonywania pomiarów instalacji PV za pomocą kamer termowizyjnych. Na przykładach pokazane zostały wybrane defekty i zakłócenia, które mogą być wykryte przy zastosowaniu kamery termowizyjnej.

EN

The article discusses the conditions for measurements of PV installations using a infrared camera. The examples show selected defects and noises that can be detected using a thermal imaging camera.

6

Termograficzna ocena stanu technicznego wirników silników indukcyjnych

Ławrowski Z.

Napędy i Sterowanie

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2017

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R. 19, nr 6

92--98

PL

W referacie przedstawiono przykładowe defekty w wirnikach silników indukcyjnych dużych mocy oraz termograficznej (termowizyjnej) metody ich wykrywania, opisano także nowatorskie sposoby wymuszania przepływu prądu w klatce wirnika. Referat jest ilustrowany kilkoma przykładami.

EN

The paper presents examples of defects in rotor induction motors and high-power infrared detection methods are also described innovative ways of forcing the flow of current in the cage rotor. The paper is illustrated with a few examples.

7

Recognizing the authenticity of the postal envelopes sealing using IR thermography and thickness measurement

Kopeć M.

Measurement Automation Monitoring

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2017

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Vol. 63, No. 3

111--114

EN

This paper presents two methods to recognize authenticity of the postal envelopes sealing. These methods are: infrared thermography and thickness measurement. Additionally, microscope inspection is presented. Based on the results, quantitative assessment was developed. The proposed methods make it possible to recognize authenticity of the postal envelopes sealing.

8

The analysis of temperature disintegration on the body of fuel injector during research on test bench

Osipowicz T., Abramek K. F.

Combustion Engines

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2017

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R. 56, nr 1

172--177

EN

Article describes the results of researches fuel injectors on the test bench with using infrared camera. During researches has been verified various fuel injectors (working order and faulty). In results inner leaks fuel injectors have increased return dosages. Few elements influence on this. It is difficult to determine which element could be uses after disassemble. It is possible to determine the source of leaks during analysis decomposition of temperature fuel injector body.

9

Rozwój techniki sensorowej jako inteligentna specjalizacja w inżynierii bezpieczeństwa

Ignac-Nowicka J.

Systemy Wspomagania w Inżynierii Produkcji

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2016

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z. 4 (16)

32--42

PL

W artykule przedstawiono rolę sensorów w systemach monitoringu bezpieczeństwa. Przeanalizowano zastosowanie wybranych grup sensorów dla bezpieczeństwa gazowego oraz dla ochrony stref pracy. Omówiono również zastosowanie sensorów w obrazowaniu dla kamer pracujących w monitoringu bezpieczeństwa maszyn. Dla każdego obszaru zastosowania omówionych sensorów pokazano różne przykłady obecnie stosowanych aplikacji w warunkach przemysłowych. Pokazano zalety i funkcje dostępnych obecnie sensorów na rynku.

EN

The article presents the role of sensors in monitoring systems of security. They examined the use of selected groups of sensors for safety gaseous and to protect the work zones. It also discusses the use of imaging sensors for cameras working in monitoring of safety machines. For each application area described sensors showing various examples of applications currently used in industry. Showing the advantages and functions of the sensors currently available on the market.

10

Defekty wirników silników indukcyjnych dużych mocy, termograficzna ocena stanu technicznego

Ławrowski Z.

Maszyny Elektryczne : zeszyty problemowe

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2016

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Nr 3 (111)

107--113

PL

W referacie przedstawiono przykładowe defekty w wirnikach silników indukcyjnych dużych mocy oraz termograficznej (termowizyjnej) metody ich wykrywania, opisano także nowatorskie sposoby wymuszania przepływu prądu w klatce wirnika. Referat jest ilustrowany kilkoma przykładami.

EN

The paper presents examples of defects in rotor induction motors and high-power infrared detection methods are also described innovative ways of forcing the flow of current in the cage rotor. The paper is illustrated with a few examples.

11

Thermographic study of chip temperature in high-speed dry milling magnesium alloys

Kuczmaszewski J., Zagórski I., Zgórniak P.

Management and Production Engineering Review

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2016

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Vol. 7, No. 2

86--92

EN

This paper presents an overview of the state of knowledge on temperature measurement in the cutting area during magnesium alloy milling. Additionally, results of own research on chip temperature measurement during dry milling of magnesium alloys are included. Tested magnesium alloys are frequently used for manufacturing elements applied in the aerospace industry. The impact of technological parameters on the maximum chip temperature during milling is also analysed. This study is relevant due to the risk of chip ignition during the machining process.

12

Automatic analysis of thermograms as a means for estimating technical of a gear system

Błażej R., Sawicki M., Konieczna M., Kozłowski T., Kirjanów A.

Diagnostyka

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2016

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Vol. 17, No. 2

43--48

EN

All objects whose temperature is above absolute zero emit infrared radiation in the wavelength range of 740 nm to 1 mm. This range is between radio waves and visible light. This phenomenon related to thermal radiation is used in thermal imaging methods to measure values and distribution of temperatures on an inspected object. Thermal imaging method was also used to inspect a two-stage gear system from a power transmission system of a belt conveyor located in an underground mine. Performing repairs in favorable time or preparing for failures contributes to the shortening of standstill periods and therefore to the minimizing of financial losses caused by purchasing replacement parts and unintended emergency stops. Processing of thermograms was done with the use of ThermoVision Processing software, which was designed at Machinery Systems Division, Wroclaw University of Technology, in particular for thermal imaging diagnostics of gear systems. The software automatically identifies gear-wheels and divides the gear system into predefined areas - Ar01 to Ar10. It allows for processing single files and whole folders. The inspection allowed to create object characteristics and specify its temperatures during steady work, which will serve as point of reference when the inspection is repeated at intervals of approximately several months. As a result, significant changes of the gear’s condition will become detectable, by calculating the difference between average temperatures for each area at two measurements. Temperature measurements are possible not only on the gear system but also on the motor shaft and the drive drum shaft. In the future, creating an application that would enable processing images of those parts will allow for multidimensional analysis of belt conveyor power transmission systems.

PL

Wszystkie obiekty o temperaturze większej od zera bezwzględnego emitują promieniowanie podczerwone o długości fal w zakresie od 740 nm do 1 mm. Zakres ten zawiera się pomiędzy falami radiowymi a światłem widzialnym. Zjawisko związane z promieniowaniem cieplnym wykorzystuje się w metodach termowizyjnych do pomiaru wartości i rozkładu temperatur na badanym obiekcie. Metodą termowizyjną zbadano dwustopniową przekładnię zębatą z układu napędowego przenośnika taśmowego znajdującego się w kopalni podziemnej. Wykonywanie naprawy w odpowiednim czasie lub przygotowanie się do awarii przyczynia się do skrócenia czasu przestojów, a tym samym zminimalizowania kosztów związanych z zakupem nowych części i niezamierzonymi przerwami w pracy. Do przetworzenia termogramów z badań posłużono się programem ThermoVision Processing, który został opracowywany w Zakładzie Systemów Maszynowych Politechniki Wrocławskiej specjalnie na potrzeby diagnostyki termowizyjnej przekładni. Oprogramowanie automatycznie identyfikuje koła zębate oraz dzieli przekładnię na wcześniej zdefiniowane obszary - od Ar01 do Ar10. Możliwe jest przetwarzanie za jego pomocą zarówno pojedynczych plików jak i całych katalogów. Badania umożliwiły stworzenie charakterystyki obiektu wraz z wyszczególnieniem temperatur w trakcie jego ustabilizowanej pracy co stanowić będzie punkt odniesienia, gdy pomiary zostaną powtórzone w odstępie najlepiej kilkumiesięcznym. Możliwe będzie wówczas określenie istotnych zmian stanu poprzez obliczenie różnicy średnich temperatur w każdym obszarze dla dwóch pomiarów. Oprócz przekładni zębatej możliwe jest wykonanie pomiarów temperatury na wale silnika i wale bębna napędowego. Stworzenie aplikacji do przetwarzania obrazów pochodzących z tych podzespołów pozwoli w przyszłości na wielowymiarową analizę stanu układów napędowych przenośnika.

13

Thermobaric Effects of Cast Composite Explosives of Different Charge Masses and Dimensions

Simić D., Andjelić U., Knežević D., Savić K., Draganić V., Sirovatka R., Tomić L.

Central European Journal of Energetic Materials

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2016

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Vol. 13, no. 1

161--182

EN

The aim of this research was to determine the thermobaric effect of cast composite explosives, with different masses and dimensions of the chosen explosive charges. This was done by measuring the shock wave parameters in air (maximum overpressure and pressure impulse) and quantifying the thermal effect (temperature-time dependence), at different distances from the centre of the detonation. The chosen thermobaric explosive composition, TBE-3, was characterized. Its density, detonation velocity and viscosity-time dependence were determined. Experimental samples of different masses and calibres were prepared. The shock wave parameters in air were determined in field tests, by measuring the overpressure by piezo-electric pressure transducers. The detonation and the expansion of the explosion products were filmed by a TV high-speed camera, Phantom V9. An infrared (IR) camera FLIR SC7200 was used for recording the IR scene of the explosions and for tracking the thermal effects by a thermographic technique, i.e. thermal imaging. This work is an initial step towards establishing a method for the quantification of the thermal effects of a thermobaric detonation.

14

On-line temperature recording in a multi cooling channel injection molding tool

Postawa P., Stachowiak T., Grzesiczak D.

Polimery

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2015

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T. 60, nr 5

351--355

EN

In this paper the temperature distribution in injection mold was investigated. For this purpose a special experimental mold was designed and made. This mold has eight independent cooling circuits which were connected to a temperature controller using two rotameters. In order to register temperature changes, four thermocouples placed in various points of the mold under the cavity surface and connected to a recorder. It allowed to transmit the data in real time during the injection process and to determine the temperature profile in various areas of injection molding. The infrared thermal images and temperature distribution profiles of the mold cavity and molded parts were also determined.

PL

Zbadano rozkład temperatury w formie wtryskowej oraz zaprojektowano i wykonano eksperymentalną formę wtryskową wyposażoną w osiem niezależnych obiegów chłodzących, podłączonych do termostatu za pośrednictwem dwóch rotametrów. W celu rejestracji zmian temperatury w różnych punktach formy tuż pod powierzchnią gniazda umieszczono cztery termopary połączone z rejestratorem, które umożliwiały przesyłanie danych, w czasie rzeczywistym, podczas trwania procesu i wyznaczenie profilu temperatury w różnych obszarach formy wtryskowej. Sporządzono też termogramy w podczerwieni i profile rozkładu temperatury gniazda formy oraz wypraski.

15

Pomiar rozkładu temperatury w strefie skrawania za pomocą kamery termowizyjnej

Kiszka P., Grzesik W., Rech J.

Mechanik

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2015

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R. 88, nr 3

197--200

PL

Przedstawiono wyniki pomiaru rozkładu temperatury w strefie skrawania uzyskane za pomocą kamery termowizyjnej podczas toczenia ortogonalnego żeliwa sferoidalnego (perlityczno-ferrytycznego) ostrzami z ceramiki azotkowej i CBN. Program eksperymentu obejmował pomiar średniej i maksymalnej temperatury kontaktowej oraz uzyskanie kolorowych termogramów.

EN

Reported are the results of temperature distribution measurements in the cutting zone carried out by means of a thermal image camera during orthogonal turning of the pearlitic-ferritic (PF) spheroidal cast iron (EN-GJS-500-7 grade) using CBN and nitride ceramic tools. The experiment consisted of measurements of the average and the maximum cutting contact temperatures and color thermal photographs.

16

Thermomechanical Properties of Vulcanized Rubber investigated by Testing Machine and Infrared Camera

Staszczak M, Pieczyska E. A., Maj M., Urbański Ł., Odriozola I., Martin R.

Measurement Automation Monitoring

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2015

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Vol. 61, No. 6

206--209

EN

: Experimental results of effects of thermomechanical couplings occurring both in natural vulcanized rubber and rubber with self-healing polyurethane subjected to tension at different strain rates are presented. Mechanical characteristics were recorded by testing machine, while the sample temperature changes accompanying the deformation process was measured by infrared camera. The goal was to investigate influence of self-healing polyurethane on the rubber mechanical and thermomechanical properties. It was found that the introduction of the self-healing polyurethane ensures the higher elasticity and the lower tensile strength of the rubber. It was also confirmed that the material is very sensitive to the strain rate; the higher the strain rate, the higher the values of the stress and temperature increases have been obtained.

17

Investigation of thermal effects accompanying tensile deformation of Shape Memory Polymer PU-SMP

Pieczyska E. A., Staszczak M, Maj M., Tobushi H., Hayashi S.

Measurement Automation Monitoring

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2015

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Vol. 61, No. 6

203--205

EN

Experimental results of effects of thermomechanical couplings occurring in shape memory polymer subjected to tension are presented. Stress-strain curves were recorded by testing machine, while their related temperature changes were measured with infrared camera. The mechanical and thermal characteristics were used to investigate the polymer properties. Three various stages were distinguished during the deformation process. The first, elastic, is accompanied by a drop in the specimen temperature; the second, plastic, is associated with change of the material structure and the temperature increase; the third stage, related to the specimen rupture and damage mechanisms, is accompanied by the significant increase in temperature.

18

Pomiar temperatury pary ciernej w badaniach modelowych

Skorupka Z.

Logistyka

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2015

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nr 3

4420--4429, CD 1

PL

Hamulce są jednym z kluczowych układów bezpieczeństwa we wszystkich pojazdach mechanicznych. Stanowią standardowe a także wymagane warunkami prawa wyposażenie w pojazdach samochodowych, jednośladach oraz samolotach. Podczas działania hamulca ciernego energia kinetyczna ruchu pojazdu jest przetwarzana na energię cieplną penetrującą w elementy mechaniczne hamulca, która jest następnie oddawana do ośrodka, w którym pracuje hamulec. Taka zasada pracy hamulca ciernego powoduje powstawanie wysokich temperatur w jego obrębie, co wpływa na jego charakterystyki pracy. W niniejszej pracy autor przedstawia wyniki swoich badań modelowych par ciernych pod kątem przeznaczenia ich do wysoko obciążonych hamulców ciernych w zastosowaniach lotniczych, a także innych pojazdów mechanicznych. W swoich badaniach autor położył nacisk na pomiar temperatury podczas procesu jednokrotnego hamowania. Do pomiarów temperatury użyte zostały jednocześnie metody stykowe i bezstykowe, w celu porównania pozyskanych wyników i przydatności poszczególnych metod. Wyniki otrzymane podczas opisywanych badań przydatne będą w dalszych pracach związanych z pomiarami temperatury badań hamulców.

EN

Brakes are the one of the most important safety system in all of the moving vehicles. Having a brake system in vehicle such as motorcars, airplanes or motorbikes is nowadays an industry standard, which is also required by law. During friction brake operation, kinetic energy of vehicle movement is converted to thermal energy, which is penetrating brake mechanical components. In result thermal energy is dissipated into the medium in which brake is operating. Such friction brake operating principle is responsible for producing high temperatures in the brake itself, what affects its work characteristics. In this article, author presents results of his research on sample friction pairs used in high-energy brakes used in not only in aviation but also in various vehicle’s brakes. Author mainly focused on temperature measurement during single high energy braking. For temperature measurements contact and contactless methods were used simultaneously for direct result comparison and for evaluation suitability of each method. Obtained results can be treated as base for other works using brake temperature measurements.

19

Koncepcja pomiaru rozkładu prędkości strumieni powietrza w kabinie lakierniczej z wykorzystaniem kamery termowizyjnej

Nikończuk P., Królikowski T., Rypina Ł.

Logistyka

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2015

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nr 3

3536--3541, CD 1

PL

W prowadzonych pracach badawczych a także projektowaniu i eksploatacji kabin lakierniczych ważnym elementem jest jednorodność rozkładu strumieni powietrza wewnątrz komory lakierniczej. Zapewnia to zapobieganie koncentracji cząstek stałych mgły lakierniczej oraz lotnych związków organicznych. Koncentracja wspomnianych związków w postaci gazowej i/lub stałej stanowi zagrożenie dla życia i zdrowia lakiernika oraz powstawania atmosfery zagrożonej wybuchem. Obecnie najczęstszą metodą pomiaru rozkładu intensywności pomiaru strumieni powietrza jest pomiar punktowy z wykorzystaniem anemometru. W artykule przedstawiono koncepcję metodyki pomiarów rozkładu prędkości powietrza wewnątrz kabiny lakierniczej z wykorzystaniem kamery termowizyjnej.

EN

The research work as well as the design and operation of the spray booth is an important element of uniformity of the air flow distribution inside the paint chamber. This ensures the prevention of concentration of overspray particulates and volatile organic compounds. The concentration of these compounds in the gaseous and / or solid form poses a threat to the life and health of the painter. Additionally, it can create potentially explosive atmosphere. Currently, the most common measuring method of the air flow intensity distribution is the spot metering using an anemometer. The paper presents a concept of measurement methodology of the air velocity distribution inside the spray booth using an infrared camera.

20

Conditions for the use of infrared camera diagnostics in energy auditing of the objects exposed to open air space at isothermal sky

Kruczek T.

Archives of Thermodynamics

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2015

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Vol. 36, no. 1

67--82

EN

Convective and radiation heat transfer take place between various objects placed in open air space and their surroundings. These phenomena bring about heat losses from pipelines, building walls, roofs and other objects. One of the main tasks in energy auditing is the reduction of excessive heat losses. In the case of a low sky temperature, the radiation heat exchange is very intensive and the temperature of the top part of the horizontal pipelines or walls is lower than the temperature of their bottom parts. Quite often this temperature is also lower than the temperature of the surrounding atmospheric air. In the case of overhead heat pipelines placed in open air space, it is the ground and sky that constitute the surroundings. The aforementioned elements of surroundings usually have different values of temperature. Thus, these circumstances bring about difficulties during infrared inspections because only one ambient temperature which represents radiation of all surrounding elements must be known during the thermovision measurements. This work is aimed at the development of a method for determination of an equivalent ambient temperature representing the thermal radiation of the surrounding elements of the object under consideration placed in open air space, which could be applied at a fairly uniform temperature of the sky during the thermovision measurements as well as for the calculation of radiative heat losses.