A5055184690- Thermography and Photoacoustic Techniques
- Calibration and Measurement Techniques
- Laser Material Processing Techniques
- Radiative Heat Transfer Studies
- Advanced Sensor Technologies Research
- Infrared Thermography in Medicine
- Adhesion, Friction, and Surface Interactions
- Thermal Regulation in Medicine
- Thermoregulation and physiological responses
- Laser-induced spectroscopy and plasma
- Advanced Surface Polishing Techniques
- Mechanical and Thermal Properties Analysis
- Welding Techniques and Residual Stresses
- Tribology and Lubrication Engineering
- Advanced Control Systems Optimization
- Surface Roughness and Optical Measurements
- Surface Treatment and Coatings
- Laser-Ablation Synthesis of Nanoparticles
- Material Properties and Applications
- Advanced machining processes and optimization
- Thermal properties of materials
- Metallurgical Processes and Thermodynamics
- High Entropy Alloys Studies
- Brake Systems and Friction Analysis
- Induction Heating and Inverter Technology
University of West Bohemia
2015-2024
Škoda (Czechia)
1999
A survey of the state art in field spectral directional emissivity measurements by using radiometric methods is presented. Individual quantity types such as spectral, band, or total are defined. Principles measurement various (direct and indirect, calorimetric radiometric) discussed. The paper focused on direct methods. An overview experimental setups provided, including design individual parts applied reference sources radiation, systems sample clamping heating, detection systems, for...
A new experimental device for normal spectral emissivity measurements of coatings in the infrared range from 1.38 μm to 26 and temperature 550 K 1250 is presented. Fourier transform spectrometer (FTIR) used detection sample blackbody radiation. Sample heating achieved by a fiber laser with scanning head. Surface measured two methods. The first method uses an camera reference coating known effective emissivity, second based on combination Christiansen wavelength contact noncontact surface...
A unique combination of the ultrashort high-energy pulsed laser system with exceptional beam quality and a novel Diffractive Optical Element (DOE) enables simultaneous production 2601 spots organized in square-shaped 1 × mm matrix less than 0.01 ms. By adjusting processing parameters each spot can contain Laser Induced Periodic Surface Structures (LIPSS, ripples), including high-spatial frequency LIPSS (HFSL) low-spatial (LSFL). DOE placed before galvanometric scanner allows easy integration...
Increased temperature in humans is the symptom of many infectious diseases and it thus an important diagnostic tool. Infrared measurement methods have been developed applied over long periods due to their advantage non-contact fast measurements. This study deals with a statistical evaluation possibilities limitations infrared/thermographic human measurement. A short review use infrared medical applications provided. Experiments statistics-based confirm expected accuracy limits...
Coatings deposited on a material surface are effective way of changing its properties. For increasing or decreasing radiation heat transfer, coatings with high low emissivity used. Measurement spectral is fundamental step to use for this application. Up now the measurement methods focused bulk samples and mainly opaque ones. Here we present method enabling semitransparent coating itself, although it substrate. The based transmittance reflectance using an integration sphere system Fourier...
A shifted laser surface texturing method (sLST) was developed for the improvement of production speed functional textures to enable their industrial applicability. This paper compares classic methods using a practical example, with focus on delivering highest processing speed. The accuracy texture is assessed by size and circularity measurements use LabIR paint depth profile measurement contact profiler. heat accumulation temperature increase usage efficiency were also calculated. (path...
Technical Briefs On the Wave Diffusion and Parallel Nonequilibrium Heat Conduction M. Honner, Honner Mechanical Engineering Research, Skoda Vyzkum s.r.o., Tylova 57, CZ 31600 Plzen, Czech Republic e-mail: mhonner@vyz.ln.skoda.cz. Search for other works by this author on: This Site PubMed Google Scholar J. Kunes Department of Physics, University West Bohemia, Univerzitni 22, 30614 kunes@kfy.zcu.cz Author Article Information Transfer. Aug 1999, 121(3): 702-707 (6 pages)...
Abstract This paper deals with processes of thermoelastic instability occurring on brake systems that become evident as a non-uniform distribution temperature hot spots contact surfaces. Thermoelastic is accompanied by the exponential rising amplitudes during its initial linear phase. The authors discuss different mechanisms interruption growth, based experimental and computational results. An example data presented for case disc brake. Keywords: Disc brakesHot spot measurementHot...
A three-dimensional model of direct heat treatment a sample surface with moving laser has been established utilizing the finite element method. Attention is devoted to preparation complex boundary conditions source. Boundary material are defined in form transfer coefficient consideration several effects. Those include general distribution energy beam, motion velocity, axis position outside sample, and utilization multiple tracks over sample. Various arrangements proposed computer simulated....
Non-contact temperature measurement of persons during an epidemic is the most preferred option because safety personnel and minimal possibility spreading infection. The use infrared (IR) sensors to monitor building entrances for infected has seen a major boom between 2020 2022 due COVID-19 epidemic, but with questionable results. This article does not deal precise determination individual person focuses on using cameras monitoring health population. aim large amounts data from many locations...