Surface inspection problems in thermoelectric testing

Abouellail, A. A.; Obach, I. I.; Soldatov, A. I.

doi:10.1051/matecconf/201710201001

Cited by 12 publications

(4 citation statements)

References 8 publications

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“…In order to verify the model, a set of experimental data is needed that reflects the electrical characteristics of typical thermoEMF sources and their combinations. Experimental studies were carried out on a specially made installation, which comprises a thermal chamber, in which investigated thermocouples are put, a voltmeter, a variable load, a microcontroller and a personal computer to control all the components of this installation [12,29]. The thermocouples that are chosen to emulate experimental sources of thermoEMF are of types: copper-constantan, copper-nichrome and chromel-alumel.…”

Section: Model Verificationmentioning

confidence: 99%

Simulation of Multipoint Contact Under Thermoelectric Testing

Kostina

2024

Eurasian phys. tech. j.

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The article presents the results of modeling a multipoint contact in the thermoelectric method of testing. Sources of thermoelectromotive force (thermoEMF) have shown different influences, according to their type, on the load characteristics of the equivalent source obtained by parallel connection of several thermocouples as shown in the explanatory figures. The presented model is implemented in the NI LabVIEW package, which is freely available. The model was verified on three types of thermocouples (copper-constantan, copper-nichrome, and chromel-alumel), which have been connected in parallel in different quantities. The calculated load characteristics of the equivalent sources differ from the experimental ones by no more than 6%. The results of modeling the load characteristics of the equivalent thermoEMF sources obtained by parallel connection of different quantities of two types of thermocouples are presented. It is shown that in order to obtain reliable data, it is necessary to provide an equivalent source load of at least 1 kOhm.

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Section: Model Verificationmentioning

confidence: 99%

Simulation of Multipoint Contact Under Thermoelectric Testing

Kostina

2024

Eurasian phys. tech. j.

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“…To measure the temperature difference at the boundaries of the thermal interface layer, it is necessary to install two temperature sensors so that one of them has thermal contact only with the body of the semiconductor element as close as possible to the thermal interface and does not have thermal contact with the heat sink, and the second has thermal contact with the heat sink and does not have thermal contact with the body of the semiconductor element. Installing temperature sensors in this way complicates the verification process and introduces an error in determining the thermal resistance, because part of the heat is dissipated in the body of the semiconductor device up to the temperature sensor [24].…”

Section: Mathematical Modelingmentioning

confidence: 99%

Thermoelectric Monitoring of Thermal Resistance in Electronic Systems

Abouellail

2023

Eurasian phys. tech. j.

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The article proposes to apply the method of thermoelectric testing to determine the thermophysical parameters of the thermal interface. A thermal interface is located between metal surfaces, between which, thermoelectromotive force occurs during heating at any stage of the device operation. The obtained graphs of the temperature difference dependence on the heating time, measured by thermocouples, and measured using thermoelectromotive force confirm the accuracy of the thermoelectric method of testing. Graphs visualize the heat transfer process with thermal resistance variation, temperature fluctuations and the resulting thermoelectromotive force. The proposed method makes it possible to monitor thermal resistance with an error of less than 8 %.

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“…One of the approaches to study this mechanism is the replication of the heterogeneous surface by different types of thermocouples connected in parallel (Fig. 2) [19,20]. To study the thermoelectric characteristics of thermocouples connected in parallel, having their own EMF, internal and contact resistance, and the total load voltage, it is first necessary to determine the electrical characteristics of the individual thermocouples.…”

Section: Statement Of the Problemmentioning

confidence: 99%

Research of Thermocouple Electrical Characteristics

Abouellail

Obach

Sorokin

et al. 2018

MSF

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This paper presents the results of the experimental research on the electrical characteristics of two dissimilar thermoelectric power sources. Chromel-alumel and nichrome-constantan are the investigated types of thermocouples that are utilized as thermopower sources. Through the assistance of the collected data, experimental and theoretical studies of two equivalent thermopower sources are done. The first studied source is obtained by a parallel connection of the two types of thermocouples, and the second studied source is achieved by the parallel connection of two thermocouples of nichrome-constantan and a single thermocouple made of chromel-alumel. Theoretical studies of the two equivalent thermoelectric sources proved good repeatable precision of the studied results of experimental measurements.

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Surface inspection problems in thermoelectric testing

Cited by 12 publications

References 8 publications

Simulation of Multipoint Contact Under Thermoelectric Testing

Simulation of Multipoint Contact Under Thermoelectric Testing

Thermoelectric Monitoring of Thermal Resistance in Electronic Systems

Research of Thermocouple Electrical Characteristics

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