Milan Honner

Milan Honner
University of West Bohemia · New Technologies - Research Centre

Professor
Head of Infrared Technologies team, focused on applied research and infrared technologies

About

51
Publications
4,088
Reads
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386
Citations
Introduction
Head of Infrared Technologies team, focused on applied research and infrared technologies
Additional affiliations
January 2005 - present
University of West Bohemia
Position
  • Head of Department
Description
  • management of research projects, quantitative thermography, measurement of optical properties, laser technologies for material processing
January 2005 - present
University of West Bohemia
Position
  • Head of Department
Description
  • advisor of master's and doctoral projects in the field of Physics, Thermodynamics, Materials Engineering, Engineering Technology, accredited tutor for doctoral studies at the Faculty of Mechanical Engineering and the Faculty of Applied Sciences,
July 2000 - December 2004
University of West Bohemia
Position
  • Researcher
Description
  • infrared camera measurement, measurement of thermal properties of materials, heat treatment technologies
Education
September 1995 - February 1999
University of West Bohemia
Field of study
  • Plasma physics and physics of thin films
September 1990 - July 1995
University of West Bohemia
Field of study
  • Physics of technological processes and physical technology

Publications

Publications (51)
Article
Full-text available
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 of 2601 spots organized in the square-shaped 1 × 1 mm matrix in less than 0.01 ms. By adjusting the laser and processing parameters each spot can contain Laser Induced Per...
Article
Full-text available
The paper deals with a new approach to laser thermography for the inspection of coating thickness. The approach is based on scanning the specimen surface point by point, using a low-power laser, and recording the temperature responses with an IR camera. A recorded sequence is then transformed into a sequence similar to a flash pulse thermography se...
Article
Full-text available
ncreased temperature in humans is one of symptoms of infectious diseases. Infrared thermography is a popular method for measuring temperature as it offers fast and non-contact temperature measurement. However, and despite many advantages, its real accuracy for human temperature measurement is not sufficient in many cases. This study was focused on...
Article
Ultrashort pulse laser micromachining is affected by the heat accumulation resulting from the residual heat from previous laser pulses on the sample surface. Up to now, most of the works analysed the accumulation by numerical modelling. The present work focussed on development and application for the first time of a measurement system of heat accum...
Article
Full-text available
A shifted laser surface texturing method (sLST) was developed for the improvement of the production speed of functional surface textures to enable their industrial applicability. This paper compares the shifted method to classic methods using a practical texturing example, with a focus on delivering the highest processing speed. The accuracy of the...
Conference Paper
Infrared camera comparative measurement methods of thermally optical properties of materials are based on the measurement of infrared radiation emitted from the surface of the material that is heated to a higher temperature. These methods compare the response of the analyzed material with the set of reference materials called standards. Standards a...
Article
In this paper, a new measurement system and a new approach in calculation for infrared (IR) radiation investigation in quasi-simultaneous transmission laser welding of plastics are presented. The measurement system is based on a MW/SWIR (medium-wave/short-wave IR) camera and optical filters narrowing the spectral region to SWIR. The measured signal...
Article
Full-text available
Coatings deposited on a material surface are effective way of changing its surface properties. For increasing or decreasing radiation heat transfer, coatings with high or low emissivity are used. Measurement of spectral emissivity is a fundamental step to effective use of coatings for this application. Up to now the measurement methods are focused...
Article
The paper deals with uncertainty analyses of the new laboratory method for the measurement of spectral emissivity of high-temperature coatings. These coatings are intended to increase heat transfer in various industrial applications. The experimental set-up of the method is shortly introduced. The method is innovative in the application of scanning...
Article
A three-dimensional model of direct heat treatment of a sample surface with a moving laser has been established utilizing the finite element method. Attention is devoted to the preparation of complex boundary conditions of a moving heat source. Boundary conditions of material heat treatment are defined in the form of the heat transfer coefficient w...
Patent
Utility model (PUV): Thermographic camera for quantitative temperature fields measurement (CZ:Termovizní kamera pro kvantitativní měření teplotních polí). Utility model (PUV) - national; app. no. PUV 2016-32519; reg. date 29.06.2016; Owner: Západočeská univerzita, Plzeň, CZ; Authors: Milan Honner, Michal Švantner (utility model - rejected)
Article
The development of an experimental mathematical model describing temperature state of the sample during high temperature spectral emissivity measurement is introduced. Dimensional analysis of the measurement process gives the physical dimensionless quantities and sensitivity analysis of the measurement process provides the large set of performed mo...
Conference Paper
The aim of the performed work is to establish the 2D and 3D model of direct unsteady task of sample heat treatment by moving source employing computer model on the basis of finite element method. Complex boundary condition on heat loaded sample surface is the essential feature of the task. Computer model describes heat treatment of the sample durin...
Article
A new non-contact laser heating method for the normal spectral emissivity measurements of high-temperature coatings is introduced. The method utilizes laser source in combination with scanning optics. General and specific requirements for the method development are discussed. Works on the development of the optimal heating strategy to ensure homoge...
Article
Computer model of temperature distribution in the sample in high temperature spectral emissivity measurement method is introduced. Sensitivity analysis is performed using computer model to determine the effect of various measurement method parameters on the sample temperatures. The effects of measured and reference coating thicknesses, measured coa...
Conference Paper
Fatigue properties are among the very important material parameters, whose testing is expensive and time consuming. Thermographic inspection of the cyclically loaded samples could possibly be a method, how to reduce the expenses of fatigue tests. Principles of cyclic loading thermographic inspection and methods of evaluation are presented in this c...
Article
A survey of the state of the art in the field of spectral directional emissivity measurements by using radiometric methods is presented. Individual quantity types such as spectral, band, or total emissivity are defined. Principles of emissivity measurement by various methods (direct and indirect, and calorimetric and radiometric) are discussed. The...
Conference Paper
Optical properties of materials have significant effect on laser processes. Laser beam interacts with a material as light and absorptivity of the material to this light determines the amount of heat that is coupled to the material. The other light is lost. Emissivity determines cooling effects during and after the process by radiation heat transfer...
Article
A new experimental device for normal spectral emissivity measurements of coatings in the infrared spectral range from 1.38 μm to 26 μm and in the temperature range from 550 K to 1250 K is presented. A Fourier transform infrared spectrometer (FTIR) is used for the detection of sample and blackbody spectral radiation. Sample heating is achieved by a...
Article
Continuous furnaces are commonly used for steel billet reheating before a rolling operation. It is neces- sary to perform a number of measurements to set-up and operate the optimization system of the fur- naces correctly. A charge temperature measurement using infrared detectors can be one of the usable measurement techniques. This non-contact meas...
Patent
Device for making surfaces of high roughness and specific mechanical properties (CZ: Zařízení pro vytváření povrchů o vysoké drsnosti a specifických mechanických vlastnostech); Utility model - national; app. no. 2013-27458; reg. no. 25604; reg. date 15.02.2013; Owner: Západočeská univerzita, Plzeň, CZ; Authors: Michal Švantner, Milan Honner, Matěj...
Patent
Patent: A method and a device for producing surfaces of high roughness and specific mechanical properties (CZ: Způsob a zařízení pro vytváření povrchů o vysoké drsnosti a specifických mechanických vlastnostech); Patent - national; app. no. 2013-108, doc. no. 307120; reg. date 15.02.2013; Owner: Západočeská univerzita, Plzeň, CZ; Authors: Michal Šva...
Article
Full-text available
The research work presented in this paper shows influence of filler composition in inorganic composite on its emissivity. Chromium Oxide is an active ingredient, which is present in the basic formula of BG HitCoat®. Also other active ingredients (Iron powder, Kaolin, Silicon Carbide, Boron Carbide, Boron Nitride and Aluminum Nitride) were built in...
Article
The paper deals with heat flux measurement possibilities in fire safety applications. The paper presents two methods for radiation heat flux measurement – the thermography source-target measurement method, and the radiation contact target measurement method. Both the methods were used simultaneously for radiation heat flux measurement during a fire...
Conference Paper
Detailed analysis of the entire reheating process obeying energy balance is presented. A complex mathematical model involving radiative heat transfer, conduction and simple combustion is systematically used to design an optimization control algorithm with respect to real technological and process constraints, which are handled in straight manner. A...
Conference Paper
The contribution deals with the methodology of determination of the effect of coatings deposited on the inner surface of the electric furnace on the charge heating. The demonstrative results of measuring using the laboratory furnace with replaceable inner wall inserts are involved. These wall inserts are prepared from the two types of thermal insul...
Article
High power laser - total emissivity method (HPL-TE method) for determination of coatings relative total emissivity dependent on the temperature is introduced. Method principle, experimental and evaluation parts of the method are described. Computer model of HPL-TE method is employed to perform the sensitivity analysis of the effect of method parame...
Article
This paper deals with processes of thermoelastic instability occurring on brake systems that become evident as a non-uniform distribution of temperature with hot spots on contact surfaces. Thermoelastic instability is accompanied by the exponential rising of temperature amplitudes of hot spots during its initial linear phase. The authors discuss di...
Article
This article deals with the application of the stochastic Exodus method for modelling of thermal spraying heat transfer processes and for solving direct and indirect problems. The Exodus stochastic method has an advantage in straightforward solving of the transient inverse heat transfer multi-dimensional problems over other methods based on iterati...
Article
This paper deals with the introduction of a measuring system for application in research on the thermomechanical coupling of disc brakes. The first part is devoted to a description of the system for fast measurement of the brake disc surface temperature field during braking, which is the main part of the measuring system. The structure of the hardw...
Article
The contribution deals with the introduction of the measuring system for the application in the research of thermo-mechanical instabilities of disc brakes. The first part is devoted to the description of the system for fast measurement of the brake disc surface temperature field during braking, which is the main part of the measuring system. The se...
Conference Paper
Full-text available
This paper deals with the application of the stochastic Exodus method in simulation of the heat transfer processes in the multi-layer structure of thermal barrier coating. A 2D computer simulation model of thermal barrier behaviour during its dynamic thermal loading is presented. The Exodus stochastic simulation method has been applied to solve the...
Article
Thermal box-barriers (TBB) are used for the thermal protection of measuring systems during exposure in a high temperature environment of various furnaces. This paper deals with problems of TBB design. TBB characteristics and limitations are discussed. The four-layer TBB structure is proposed for the high temperature application. The computer simula...
Article
The hole drilling residual stress measuring method is based on drilling a small hole in a material sample and measuring the strain relieved in the hole vicinity by a special strain gauge rosette. The temperature and thermal strain induced by the drilling process can cause significant errors in the relieved strain measurement. The paper deals with c...
Article
A computer simulation model of billet heating process in continuous pusher-type furnace is presented. The Exodus stochastic simulation method is used to solve the heat conduction partial differential equation. This paper deals with the application of the Exodus method in the furnace optimal heating-control system. A comparison of the computed resul...
Article
The paper deals with methods and results of thermography analyses of the hole-drilling residual stress measuring technique. Surface IR properties of the drilling mill and sample with strain gauge rosette of millimeter dimensions are determined by the emissivity and reflectivity measurements. Dynamic surface temperature field measurement is accompan...
Article
This paper deals with thermography applications in technology research, including the measurement of the heat treatment of large crankshafts, test and measurement of thermal barrier coatings, analysis of the hole- drilling residual stress measuring technique, the thermal spraying of protective coatings, measurement and evaluation of hot-air solderi...
Article
The paper deals with the measurement in continuous industrial furnaces. Measuring technique and measuring device are presented. Temperature evolutions are measured on the experimental billet and records of the furnace heating-control system are shown. Furnace distributions of temperature, heat flux, and heat transfer coefficient are determined by m...
Article
Résumé: This book is theoretically and experimentally focused on thermal barriers. It consists of three independent parts dealing with thermal barrier coatings (TBC), thermal box-barriers (TBB) and natural thermal barriers (TBN). The thermal barrier coatings serve mainly to material protection against high temperatures. Thermal box-barriers introdu...
Article
Thermal barriers (TB) protect material against high temperatures and thermal shocks. The effect of various TB - substrate structures to their dynamic behaviour under the thermal shock is studied. The TB parameters such as number of individual layers, their thicknesses and porosities and thermal and mechanical properties of their materials have been...
Article
The contribution presents the development on the optimal heating control system for con-tinuous furnaces. Concept and basic description of the optimization system are introduced. Partial focus is devoted to the CFD computations of thermo-mechanical processes in the in-ternal furnace space and to the ways of measurement in continuous furnaces.
Conference Paper
Full-text available
The aim of the contribution is to present the current computational capabilities and results of thermomechanical processes simulation in the industrial furnace. Three-dimensional model of the continuous pusher-type furnace employed in mild rolling mill has been created. The resultant velocity and temperature distributions inside the furnace, heat f...
Article
Microscale nonequilibrium heat conduction appears in all states of matter including solids, liquids, gases and plasmas where heat is carried by phonons, atoms, molecules, electrons or photons. A unified model of diffusion, wave and parallel conduction is introduced. Internal parameters and conditions of unambiguity describing the nonequilibrium are...
Article
This paper deals with one-dimensional simulation of heat waves, which occur in materials affected by pulsed or continuous surface heat source. The mathematical model is constructed according to the extended hyperbolic heat conduction (EHHC) theory. Effects of relaxation numbers, surface emissivity, or surface heat convection transfer are discussed....
Article
A unified description of two physically different wave diffusion and parallel nonequilibrium heat conductions is presented. Dimensionless criteria specifying the nonequilibrium state of the material and the heat propagation character have been used to specify application regions of individual modes of heat propagation. The described microscale heat...
Article
Heat transfer processes during high velocity oxy-fuel (HVOF) deposition of WC coatings are studied. Experiments were conducted with temperature measurement in the substrate by thermocouples. A designed 2D computer simulation model of the spraying process with a moving torch is fitted to match the experimentally obtained temperature evolution. The r...
Article
Heat transfer processes during high velocity oxy-fuel (HVOF) deposition of WC coatings are studied. Experiments were conducted with temperature measurement in the substrate by thermocouples. A designed 2D computer simulation model of the spraying process with a moving torch is fitted to match the experimentally obtained temperature evolution. The r...

Projects

Projects (4)
Project
The project is focused on the research of thermodiagnostic methods using IR cameras as tools for non-contact and fast identification of people with increased temperature and at the same time tools aiming to ensure the national security and management of epidemic threats. Details at https://medical.labir.cz/en/ Main goal: - To learn from the COVID ‐ 19 epidemic and to prepare a solution for a functional system of reliable thermodiagnostics of people in the Czech Republic for future epidemic threats manifesting the increased temperature of those infected. Additional goals: - Practically verify the hypothesis of a more accurate determination of the internal temperature of the measured person coming from an external warmer/colder environment, using an IR camera with a more sophisticated evaluation of the temperature field distribution. - Practically verify the hypothesis of earlier diagnosis of the onset of the epidemic and monitoring of its course using IR cameras with advanced processing of time series thermograms of a large number of people. - Develop a methodology for the use of thermographic diagnostic tools in times of “peace”, at the beginning of the epidemic, in the ongoing epidemic, and in local outbreaks. - To pass on information about new possibilities of using thermal imaging systems to the components of the integrated rescue system and to train them for more efficient and effective provision of their tasks not only during the epidemic. - To acquaint the professional and general public with the results of research and development and thus ensure wider application of project results, strengthen cooperation with the components of the integrated rescue system and achieve an increase in the level of security of the state and citizens in case of epidemic threats in the future.
Project
Development of thermal box-barrier which protects a device placed inside the box-barrier against mechanical damage and ambient high temperatures