Journal articles: 'Thermocamera'

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Peřina, Zdeněk, Jaroslav Solař, Blahoslav Maršálek, Eliška Maršálková, Radek Fabian, and Filip Čmiel. "Observation of Biological Pests on Building Facades by Thermocamera." Advanced Materials Research 923 (April 2014): 183–86. http://dx.doi.org/10.4028/www.scientific.net/amr.923.183.

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Microorganisms on the facades of buildings (eg, algae and cyanobacteria) are the harmful factors that cause destruction of the surface of building materials in exterior (facade paints, plasters, masonry, stone, concrete, etc.). One of the properties of listed biological factors is the production of thermal energy, which can vary in different species. Mentioned energy can be recorded using infrared thermography. The paper contains the results of the examined expressions of the biological pests on the insulated facades of the buildings using infrared thermography.

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Zanetti, E. M., S. S. Musso, and A. L. Audenino. "THERMOELASTIC STRESS ANALYSIS BY MEANS OF A STANDARD THERMOCAMERA." Experimental Techniques 31, no. 2 (March 2007): 42–50. http://dx.doi.org/10.1111/j.1747-1567.2007.00147.x.

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Nemec, Patrik, Alexander Čaja, and Richard Lenhard. "Visualization of heat transport in heat pipes using thermocamera." Archives of Thermodynamics 31, no. 4 (October 1, 2010): 125–32. http://dx.doi.org/10.2478/v10173-010-0033-6.

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Visualization of heat transport in heat pipes using thermocamera Heat pipes, as passive elements show a high level of reliability when taking heat away and they can take away heat flows having a significantly higher density than systems with forced convection. A heat pipe is a hermetically closed duct, filled with working fluid. Transport of heat in heat pipes is procured by the change of state of the working fluid from liquid state to steam and vice versa and depends on the hydrodynamic and heat processes in the pipe. This study have been focused on observing the impact these processes have on the heat process, the transport of heat within the heat pipe with the help of thermovision. The experiment is oriented at scanning the changes in the surface temperatures of the basic structural types of capillary heat pipes in vertical position.

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Čmiel, Filip, and Radek Fabian. "Assessment of Envelope of Gos Panel System Measured by Thermocamera." Transactions of the VŠB - Technical University of Ostrava. Construction Series X, no. 1 (January 1, 2010): 1–13. http://dx.doi.org/10.2478/v10160-010-0007-2.

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Audenino, A. L., V. Crupi, and E. M. Zanetti. "THERMOELASTIC AND ELASTOPLASTIC EFFECTS MEASURED BY MEANS OF A STANDARD THERMOCAMERA." Experimental Techniques 28, no. 2 (March 2004): 23–28. http://dx.doi.org/10.1111/j.1747-1567.2004.tb00155.x.

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Perzel, Vincent, Marián Flimel, Jolanta Krolczyk, Aleksandar Sedmak, Alessandro Ruggiero, Drazan Kozak, Antun Stoic, Grzegorz Krolczyk, and Sergej Hloch. "Measurement of thermal emission during cutting of materials using abrasive water jet." Thermal Science 21, no. 5 (2017): 2197–203. http://dx.doi.org/10.2298/tsci150212046p.

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This article deals with measurement of the thermal gradient on material during abrasive water jet cutting. The temperature was measured by thermocamera before the technological process started, during the abrasive water jet cutting process technology, and just after the cutting process. We performed measurements on several types of materials. We calculated the approximate amount of energy during the abrasive water jet cutting process technology that changes into thermoenergy, which is the current water pressure drained in a catcher tank.

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Luchakov, Yuriy Ivanovich, and Petr Dmitriyevich Shabanov. "Thermoexchange of different regions of the human body with environment." Reviews on Clinical Pharmacology and Drug Therapy 10, no. 4 (December 15, 2012): 54–57. http://dx.doi.org/10.17816/rcf10454-57.

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The literature and proper data concerning evaluation of thermoproduction and thermoutput of different regions of the human body are analyzed in the article. The human thermoexchange with environment was assessed in human beings weighing 69–73 kg in special thermocamera. The organism was shown to change temperature of the body tissues in definite limits only by means of thermotransfer without changing thermoproduction and thermoutput. This mechanism can explain the phenomenon of subfebrile temperature in various human diseases.

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Oravec, Pavel, Barbora Hrubá, and Zdeněk Peřina. "The Windows in the Modular Structure - Air Tightness and Quality of Installation Diagnostics." Advanced Materials Research 1041 (October 2014): 187–90. http://dx.doi.org/10.4028/www.scientific.net/amr.1041.187.

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Renewal windows and doors in residential buildings is a big trend at present. On windows, as products, a number of strict requirements that are fulfilled during laboratory testing are placed. What is the real condition after installation in the construction? The subject of this paper is the assessment of the tightness of replaced windows and doors in apartment situated in a prefabricated apartment building. For the diagnosis measuring devices Blower Door was used. At the same time scanning by infrared thermocamera was done. Critical points of leakage were detected. In the conclusion possibilities of solving leading to ensuring the required tightness are described.

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Zhou, Jian-Rong, Bunka Ishikawa, Mihoko Nakashima, and Kazumi Yokomizo. "Effects of lycium and lycium-composed formula on the peripheral coldness induced by local cooling in mice." International Journal of Phytomedicine 8, no. 3 (November 9, 2016): 353. http://dx.doi.org/10.5138/09750185.1880.

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Recently people appealing for peripheral coldness increase. Lycium fruits have a long tradition of use in nutrition and traditional medicine in East Asia, while its effect on peripheral coldness is not yet investigated. We study the effects of lycium and lycium-rich formula (Ligustrum lucidum ait, LLA) on the peripheral coldness induced by local cooling in mice.7-week old male ddY mice were administered either water (control) or lycium or LLA for 2 weeks. After an aesthesia, the mouse body except for head was immersed into 10 ℃ water for 10 min. Then the skin surface and rectal temperature of mouse were measured with a thermocamera and a thermocouple thermometer, respectively. And two laser Doppler flow probes were set to measure the skin blood flow of plantar and tail, respectively.In the case of 1-week administration on mice, 10% lycium- and 10% LLA-treatments showed good recovery of whole body surface temperature measured by a thermocamera. After 2-week administration on mice, there were not significant differences in the recovery rates of rectal temperature compared with those of the control group. And the 30 min- and 50 min-recovery rates of dorsal skin surface temperature by 1% and 10% lycium-treatment were significantly higher than those of the respective control. Further, the 30 min- and 50 min-plantar skin blood flow by 10% LLA-treatment were significantly higher than those of the respective control. The 50 min-tail skin blood flow by 10% LLA-treatment and 60 min-tail skin blood flow by 1% LLA-treatment were significantly higher than those of the control, respectively.It can be concluded that the administration of lycium or LLA on mouse led to an increase of peripheral blood blow, and thus a recovery of skin surface temperature.

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Bodnarova, Lenka, Jaroslav Valek, and Petr Novosad. "Testing of Action of Direct Flame on Concrete." Scientific World Journal 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/371913.

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The paper states results of experimental exposition of concrete test specimens to direct flame. Concrete test specimens made from various mixtures differing in the type of aggregate, binder, dispersed reinforcement, and technological procedure were subjected to thermal load. Physicomechanical and other properties of all test specimens were tested before exposition to open flame: density, compressive strength, flexural strength, moisture content, and surface appearance. The specimens were visually observed during exposition to open flame and changes were recorded. Exposed surface was photographically documented before thermal load and at 10-minute intervals. Development of temperature of the specimens was documented with a thermocamera. After exposition to thermal load and cooling down, concrete specimens were visually observed, network of cracks was photographically documented, and maximal depth of spalled area was measured.

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Ichimiya, K. "Heat Transfer and Flow Characteristics of an Oblique Turbulent Impinging Jet Within Confined Walls." Journal of Heat Transfer 117, no. 2 (May 1, 1995): 316–22. http://dx.doi.org/10.1115/1.2822523.

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Experiments were conducted to determine the turbulent heat transfer and flow characteristics of an oblique impinging circular jet within closely confined walls using air as a working fluid. The local temperature distribution on the impingement surface was obtained in detail by a thermocamera using a liquid crystal sheet. A correction to the heat flux was evaluated by using the detailed temperature distribution and solving numerically the three-dimensional equation of heat conduction in the heated section. Two-dimensional profiles of the local Nusselt numbers and temperatures changed with jet angle and Reynolds number. These showed a peak shift toward the minor flow region and a plateau of the local heat transfer coefficients in the major flow region. The local velocity and turbulent intensity in the gap between the confined insulated wall and impingement surface were also obtained in detail by a thermal anemometer.

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Mazari, Adnan, and Antonin Havelka. "Tensile Properties of Sewing Thread and Sewing Needle Temperature at Different Speed of Sewing Machine." Advanced Materials Research 627 (December 2012): 456–60. http://dx.doi.org/10.4028/www.scientific.net/amr.627.456.

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Needle heatup is a big issue for apparel industry especially for automobile industry seat covers where a lot of synthetic materials are used which get damaged by needle heat at high speed of sewing machine,in this article thermocamera and thermocouple are used to measure the precise temperature of needle eye and then 100% polyester 35x3 Tex thread is taken for sewing,the lockstitch sewing machine is run at 1000rpm,2000rpm and 3000rpm respectively and the both methods are used to obtain the accurate needle temperature and finally thread tensile properties are measured before the sewing and taking out the thread from the seam precisely to get the tensile properties of thread after 10,30 and 60 seconds of continuous stitching,the article is very helpful in predicting the exact temperature of needle in lock stitch machine and getting the damage to thread by the needle heat at different speeds and different stages of sewing process.

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Savino, Raffaele, Mario De Stefano Fumo, Diego Paterna, and Di Maso Andrea. "Arc-Jet Testing of Ultra-High-Temperature-Ceramics." Open Aerospace Engineering Journal 3, no. 1 (February 20, 2010): 20–31. http://dx.doi.org/10.2174/1874146001003010020.

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The article deals with arc-jet experiments on different Ultra High Temperature Ceramics models in high enthalpy hypersonic non equilibrium flow. Typical geometries for nose tip or wing leading edges of interest for hypersonic vehicles, as rounded wedge, hemisphere and cone are considered. Temperature measurements have been performed using pyrometers, an IR thermocamera and thermocouples. Spectral emissivity has been evaluated by suitable experimental techniques. The details of the experimental set-up, the tests procedure and the measurements are discussed in the text. The UHTC materials have been tested for several minutes to temperatures up to 2050 K showing a good resistance in extreme conditions. Fundamental differences between the various model shapes have been analysed and discussed. Numerical-experimental correlations have been carried out by a CFD code, resulting in good agreement with proper modelling. The numerical rebuilding also allowed to evaluate the catalytic efficiency and the emissivity of the materials at different temperature.

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Nishimura, Akira, Tatsuya Okado, Yuya Kojima, Masafumi Hirota, and Eric Hu. "Impact of MPL on Temperature Distribution in Single Polymer Electrolyte Fuel Cell with Various Thicknesses of Polymer Electrolyte Membrane." Energies 13, no. 10 (May 15, 2020): 2499. http://dx.doi.org/10.3390/en13102499.

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The impact of micro porous layer (MPL) with various thicknesses of polymer electrolyte membrane (PEM) on heat and mass transfer characteristics, as well as power generation performance of Polymer Electrolyte Fuel Cell (PEFC), is investigated. The in-plane temperature distribution on cathode separator back is also measured by thermocamera. It has been found that the power generation performance is improved by the addition of MPL, especially at higher current density condition irrespective of initial temperature of cell (Tini) and relative humidity condition. However, the improvement is not obvious when the thin PEM (Nafion NRE-211; thickness of 25 μm) is used. The increase in temperature from inlet to outlet without MPL is large compared to that with MPL when using thick PEM, while the difference between without MPL and with MPL is small when using thin PEM. It has been confirmed that the addition of MPL is effective for the improvement of power generation performance of single PEFC operated at higher temperatures than normal. However, the in-plane temperature distribution with MPL is not even.

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Silveira, Matheus, and Adriana S. Franca. "Simulation of Temperature Variations in the Human Eye Affected by the Presence of a Tumor." Advanced Materials Research 816-817 (September 2013): 707–11. http://dx.doi.org/10.4028/www.scientific.net/amr.816-817.707.

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The presence of a tumor inside biological bodies is known to cause increases in the temperature of surrounding healthy tissues. In the field of ophthalmology, the effects of tumor on the ocular temperature distribution have been rarely investigated, but a few experimental studies have shown that eyes with choroidal melanoma presented increases in the corneal surface temperature. Thus, the objective of this study was to simulate the thermal effects of an eye tumor on the ocular temperature distribution. The tumor was simulated as a circle, located at the interface between the sclera and vitreous. Variations in tumor size were evaluated. All simulation studies were based on the finite element discretization method (FEM), with the eye being approximated by a two-dimensional domain. Simulated results were compared to experimental data (obtained for healthy eyes employing a thermocamera), with satisfactory agreement (average % error < 1.8%). Simulations also showed that the presence of the tumor caused an increase in overall temperature values, mainly due to the effect of the more intense metabolic heat inside the tumor.

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Palazzetti, Roberto, and Xiu-Tian Yan. "Study on lubrication effect on motorbike chain transmissions." Industrial Lubrication and Tribology 68, no. 5 (August 8, 2016): 561–68. http://dx.doi.org/10.1108/ilt-10-2015-0142.

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Purpose This paper reports on the findings of first of its kind to examine motorbike’s chain transmission, focusing on chain lubrication and its effect on the temperature, efficiency and vibrations of the transmission. The novelty of the paper is to investigate holistically the lubrication effect on the transmission by comparing its dynamic performances under three different lubrication conditions: chain not lubricated at all, chain lubricated with a spray polytetrafluoroethylene (PTFE) addicted lube and chain lubricated with a mineral oil at every minute of the test. Design/methodology/approach A novel mechatronic test rig has been designed and manufactured using a thermocamera, a dynamometer and an accelerometer respectively. The rig enables a multi-parameter dynamic and real-time sensing investigation of any motorbike chain system by recording temperature, transmission's efficiency and vibrations for any tests by. An experimental investigation has been conducted by running a chain under three aforementioned lube conditions at different speeds with the purposes of: (A) measuring the effect that each lube condition has on three critical parameters: temperature, vibrations and the efficiency of the transmission, and (B) identify the best conditions for practical use. Findings Results showed that proper use of lubricant can increase the efficiency of the system, by an estimated average of 4.1% is desirable. Additionally, using a continuous lubrication with a mineral oil lubricant leads to better transmission compared to the use of the spray PTFE from the efficiency and thermal points of view. Originality/value This work presents an experimental investigation on the effect of two different kinds of lubrication form motorbike chain on transmission’s efficiency. The findings are still valid for different applications of chain transmission in dirty environments. Novelty of the paper is highlighted as follows: this is the first work scientifically investigating the importance of lubrication on chain in harsh environments, particularly of motorbike chain. The work reports a comprehensive lete set experiments and analysis of thermal and mechanical effect because of the presence of lubricant has never been shown. Three kinds of lubricants have been used, and show their distinctive effects which are separately highlighted.

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Scolari, S., R. Evans, R. Knox, M. Tamassia, and S. Clark. "41 DETERMINATION OF THE RELATIONSHIP BETWEEN VULVAR SKIN TEMPERATURES AND TIME OF OVULATION IN SWINE USING DIGITAL INFRARED THERMOGRAPHY." Reproduction, Fertility and Development 22, no. 1 (2010): 178. http://dx.doi.org/10.1071/rdv22n1ab41.

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Accurate estrus detection is an essential component of a successful AI program in modern swine operations. It is necessary to establish efficacious means of estrus detection and optimize reproductive performance in the herd. Measurement of physiological traits such as body temperature, vaginal electrical resistance, and vulva reddening have been investigated as methods to aid in estrus detection in swine. The relationship between vulvar skin temperature (VST) and ovulation has not been previously investigated. Therefore, the objective of this study was to assess changes in VST that occur during the periovulatory period using digital infrared thermography (IRT). The experiment group consisted of a total of 25 gilts and 27 multiparous sows, and the control group consisted of 30 sows that were 60 days of gestation. All Yorkshire-Landrace females were housed individually in a temperature and humidity controlled environment. VST were measured twice daily at 8-h intervals using the infrared digital thermocamera (Fluke IR FlexCam® Thermal Imager, Fluke Corporation, Everett, WA) while the animals were standing and eating prior to estrus detection. Estrus detection was performed twice daily (at 8-h intervals) with the aid of an adult boar. Once standing estrus was observed, transrectal real-time ultrasound was performed twice daily at 8-h intervals to monitor follicle development and determine the time of ovulation. Ovaries were visualized using an Aloka 500 V ultrasonics machine (Aloka Inc., Tokyo, Japan) fitted with a transrectal 7.5-MHz linear transducer, which was fitted into a rigid, fixed-angle PVC adapter. Average VST and hours were reported in mean ± SEM and compared using an ANOVA and Student’s t-test using SAS software (SAS Institute Inc., Cary, NC, USA). Additionally, pairwise comparisons were performed to compare VST at different times during estrus. Significant differences were reported at P ≤ 0.05. Evidence of CL formation and ovulation was detected at 38 ± 9.3 h after onset of estrus in gilts, and 43 ± 12 h in sows. The mean VST of sows during estrus was significantly higher (P ≤ 0.05) than that of gilts. During estrus, the mean VST of gilts reached a peak of 35.6 ± 0.24°C and then decreased significantly to 33.9 ± 0.32°C 12 h prior to ovulation. This marked change in mean VST was detected between 36 and 12 h prior to ovulation. There was a similar trend in sows with a peak mean VST of 36.1 ± 0.25°C at 24 h prior to ovulation and then dropping to 34.6 ± 0.31°C 12 h prior to ovulation. There was no significant difference (P ≥ 0.05) between VST in gilts and sows at the time of ovulation. This study demonstrated that VST of sows and gilts measured by IRT change significantly during the periovulatory period. Additionally, there are distinct times that VST rises and then falls precipitously in sows compared with gilts. Digital IRT as a predictor for ovulation in swine appears to be a promising tool. Further studies involving predictor models and hormonal assays need to be performed.

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Loprencipe, Giuseppe, Laura Moretti, Tiziana Pestillo, and Ricardo Ferraro. "Railway Freight Transport and Logistics: Methods for Relief, Algorithms for Verification and Proposals for the Adjustment of Tunnel Inner Surfaces." Sustainability 10, no. 9 (September 3, 2018): 3145. http://dx.doi.org/10.3390/su10093145.

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In Europe, the attention to efficiency and safety of international railway freight transport has grown in recent years and this has drawn attention to the importance of verifying the clearance between vehicle and lining, mostly when different and variable rolling stock types are expected. This work consists of defining an innovative methodology, with the objective of surveying the tunnel structures, verifying the clearance conditions, and designing a retrofitting work if necessary. The method provides for the use of laser scanner, thermocameras, and ground penetrating radar to survey the geometrical and structural conditions of the tunnel; an algorithm written by the authors permits to verify the clearances. Two different types of works are possible if the inner tunnel surfaces interfere with the profile of the rolling stock passing through: modification of the railroad track or modification of the tunnel intrados by mean milling of its lining. The presented case study demonstrates that the proposed methodology is useful for verifying compatibility between the design vehicle gauge and the existing tunnel intrados, and to investigate the chance to admit rolling stocks from different states. Consequently, the results give the railway management body a chance to perform appropriate measurements in those cases where the minimum clearance requirements are not achieved.

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Limmeechokchai, Sunee, Joseph Kan, Kitichai Rungcharassaeng, Charles J. Goodacre, Jaime Lozada, and Udochukwu Oyoyo. "Heat and Sound Generation During Implant Osteotomy When Using Different Types of Drills in Artificial and Bovine Bone Blocks." Journal of Oral Implantology, June 5, 2021. http://dx.doi.org/10.1563/aaid-joi-d-20-00361.

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The purpose of this study was to compare heat and sound generated during implant osteotomy when different types of drill were used in artificial bone and bovine bone blocks. A total of 80 implant osteotomies were formed using 4 implant drilling systems; N1 (OsseoShaper) (Nobel), NobelActive (Nobel), V3 (MIS) and BLX (Straumann) in both artificial bone and bovine bone blocks. Thermocouple probes were used to record temperature change at the depths of 5.0 mm and 13.0 mm of each implant osteotomy formed by the final drill. In addition, thermographic images, drilling sound, and drilling time were recorded and evaluated. Statistical analyses were performed at α = 0.05. The mean temperature changes as recorded by thermocouple probes and thermocamera were significantly lower in OsseoShaper than most other drill-bone combinations (p < .05). The mean drilling times and sound generation for OsseoShaper were significantly higher and lower than most other drill-bone combinations (p < .05), respectively. Minimal heat and sound generation can be expected when implant osteotomies are performed using Osseoshaper at a low rotational speed (50 rpm) even without irrigation. However, extended drilling time is required.

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Köcher, Jenny, Verena Knappe, and Manuela Schwagmeier. "Internal structuring of silica glass fibers: Requirements for scattered light applicators for the usability in medicine." Photonics & Lasers in Medicine 5, no. 1 (January 1, 2016). http://dx.doi.org/10.1515/plm-2015-0014.

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AbstractBackground:Diffuser fibers have been used for some time in the fields of laser-induced thermotherapy and photodynamic therapy. For their applicability the breaking strength, the thermostability and a homogeneous radiation profile are of great importance. Flexible applicators offer special benefits because they introduce a totally new range of application possibilities.Objective:The aim of the presented investigations was to develop a totally new flexible diffuser fiber generation which can be produced cheaper and without the use of any further materials. For this purpose it was proposed to induce scattering micro dots directly into silica fibers by generating a local change of the refractive index in the core of the optical fiber. The resulting diffuser was expected to create a homogeneous radiation profile containing at least 80% of the light coupled into the optical fiber, i.e. less than 20% prograde (forward) emission.Materials and methods:On the basis of former research results, scattering micro dots were induced linearly into the core of an optical silica fiber through a multiple photon process using a femtosecond laser. In addition to the macroscopic optical control by means of a microscope, the form of the radiation profile was examined as well as the non-scattered forward emission which depends on a variety of influencing factors. The processing was optimized according to the observations made. The thermostability of the developed prototypes was assessed by using a thermocamera, and the minimal bending radius was determined. Finally the prototypes were tested and validatedResults:An influence of the processing power, the number and radial position of the scattering micro dots as well as the therapeutic coupled-in wavelength onto the form of the radiation profile and the non-scattered forward emission was determined. Both the form of the radiation profile and the prograde emission were found to be independent of the therapeutic laser power coupled into the fiber. The developed prototype had a nearly homogeneous radiation profile, a forward emission of 12.8±2.1% in average, and a minimum bending radius of 31±6 mm.Conclusion:The non-scattered forward emission of the developed diffusers was within the objective of below 20% and the radiation profile was very nearly homogeneous. In order to improve the reproducibility of the production process, an improved fixation apparatus needs to be developed.

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Journal articles on the topic 'Thermocamera'

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