Liquid metals surface temperature fields measurements with a two-colour pyrometer

Monier, Romain; Thumerel, François; Chapuis, Julien; Soulié, Fabien; Bordreuil, Cyril

doi:10.1016/j.measurement.2016.12.031

Cited by 25 publications

(10 citation statements)

References 18 publications

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“…They have a tendency to increase with temperature and can rapidly increase as a material melts. This is also the reason why solid/liquid interfaces can be readily identified optically. , Equations and can be modified for a real emitter by taking the emissivity into account: and where ε is the emissivity (a.u. ), U Real (λ, T ) and U B (λ, T ) are the energy density of the emitted photons of a real surface and a blackbody, respectively (J m –3 s –1 ), and I Real and I B are the intensities of the emitted light of a real surface and a blackbody, respectively (J m –2 s –1 ).…”

Section: Emission Of Light and Temperaturementioning

confidence: 99%

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Inductive Heating for Research in Electrocatalysis: Theory, Practical Considerations, and Examples

et al. 2022

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Inductive heating in neutral or slightly reducing gaseous atmosphere has become one of the most effective methods to thermally pretreat oxygen-sensitive monocrystalline electrodes for interfacial electrochemistry and electrocatalytic research. In this contribution, we discuss the principles and theory of inductive heating, and we explain how an alternating current passing through a coil induces a resistive current inside a conductive sample. The thermodynamics and heat transport phenomena of how the thermal energy propagates and heats the sample are then discussed. Practical considerations with examples are given about how to best utilize this technique and avoid sample damage by controlling the gaseous atmosphere surrounding the sample being treated. Finally, a Ni(111) electrode is used to demonstrate the applicability of the method to interfacial electrochemistry and electrocatalysis research. The post-thermal treatment demonstrates the effect of the presence of small amounts of oxygen in the gaseous atmosphere on cyclic voltammetry profiles acquired in aqueous alkaline media.

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Section: Emission Of Light and Temperaturementioning

confidence: 99%

“…This is also the reason why solid/liquid interfaces can be readily identified optically. 45,46 Equations 19 and 20 can be modified for a real emitter by taking the emissivity into account:…”

Section: ■ Emission Of Light and Temperaturementioning

confidence: 99%

Inductive Heating for Research in Electrocatalysis: Theory, Practical Considerations, and Examples

et al. 2022

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“…We searched then for the best lamp with nearly ideal geometry and power that met our requirements. We selected a cheap P21W12V automotive incandescent lamp previously studied in many works before [54][55][56][57][58][59][60]. This lamp still in production and still sold in worldwide market.…”

Section: Theory Of the Measurementmentioning

confidence: 99%

Young’s modulus of tungsten at elevated temperatures using synchronous laser shadow vibrometry

Ayoub

El-Sherif

Hassan

et al. 2018

The International Conference on Mathematics and Engineering Phy

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This paper presents the use of an improved laser shadowgraphy method for measuring the dynamic elastic moduli of tungsten, from room temperature to near melting point. The method is based on measuring the frequency of impulse induced longitudinal vibration of a tungsten filament, subject to joule heating. The natural resonance frequency of the filament is obtained by lock-in synchronous photo-detection of the laser generated filament shadowgraph. The correlation between the filament natural frequency and its temperature lead to the calculation of shear modulus at variable temperatures, the tensile and bulk modului of tungsten. The results were compared to those obtained by laser Doppler vibrometry of a tungsten wire induced by pulsed current technique. Our method permitted a wider measuring temperature range and an easier calculation procedure. The used setup was simple, non-destructive, non-contacting and accurate, enabling low cost vibrometry measurements that help in future synthesis and test of new grades of refractory materials, deployed as plasma facing material in the latest fusion reactor or super alloys in critical applications.

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“…Mainly for the case of unknown and changing emissivity of the object surface, it is often achieved by acquiring infrared thermal images in different response bands through bandpass filters [12]. Previous studies have demonstrated that variable-spectrum infrared thermography thermometry can reduce the effect of emissivity differences [13]. This provides a reference for being able to accurately measure body surface temperature in pigs, but further research is needed on the effectiveness of this method for reducing the effects of body surface emissivity in pigs.…”

Section: Introductionmentioning

confidence: 99%

A Smartphone-Based Infrared Thermal Imaging Temperature Sensor for Accurate Temperature Measurement of Pig Groups

Jiao

2022

J. Phys.: Conf. Ser.

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Uncooled infrared thermography has shown great potential for rapid screening of the body temperature of pigs. However, temperature measurements can produce serious errors due to variations in body surface emissivity caused by skin stains or differences in emissivity between body parts. To address this problem, a rotatable infrared filter is added to the optical path of the smartphone-based uncooled infrared detector in this paper. By adding and removing the filter to obtain infrared radiation in different wavelengths, the altering spectrum temperature measurement equation is constructed to reduce the effect of emissivity differences in the measurement process of temperature. On this basis, we developed a smartphone sensor based on an uncooled infrared thermography temperature measurement system with altering spectrum. The sensor enables fast and accurate measurement of pig temperature in the group, which can provide powerful technical support for the diagnosis of physiological abnormalities and diseases in pigs.

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Liquid metals surface temperature fields measurements with a two-colour pyrometer

Cited by 25 publications

References 18 publications

Inductive Heating for Research in Electrocatalysis: Theory, Practical Considerations, and Examples

Inductive Heating for Research in Electrocatalysis: Theory, Practical Considerations, and Examples

Young’s modulus of tungsten at elevated temperatures using synchronous laser shadow vibrometry

A Smartphone-Based Infrared Thermal Imaging Temperature Sensor for Accurate Temperature Measurement of Pig Groups

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