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1

Preliminary laboratory tests of a new fibre optic high temperature measurement device

Lisiecka Ewa

Optica Applicata

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2019

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Vol. 49, nr 4

669--677

EN

This article presents the laboratory verification of the author’s algorithm for temperature determination. The conducted tests confirm the ability to eliminate the measurement condition impact (emissivity of the radiation source, attenuation of the atmosphere) on non-contact thermometric measurement results. What is more, this method allows measurement for wavelength shorter than 1 µm to be carried out. The second stage of the work involved transmission tests of the fibre optic probe. The use of three quartz rods ensured that thermal radiation from each direction in a perpendicular plane to the probe head is collected and transmitted. The combination of the new temperature determination method and new constructed measurement instrument will allow the area of application of a non-contact thermometric device to be extended.

2

Reduction of the impact of emissivity on high temperature measurements in non-contact thermometric devices

Lisiecka E.

Optica Applicata

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2017

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Vol. 47, nr 3

373--381

EN

Non-contact measurements of high temperature, accomplished with the use of infrared cameras and pyrometers, are utilized in many fields of science and industry. However, in order to obtain reliable measurement results from aforementioned devices, one should take account of the emissivity value of a thermal source the temperature of which is being measured. This is due to the necessity of calibration of non-contact thermometric devices in relation to emission characteristics of a blackbody, which is an ideal source with the maximum emissivity value. In order a non-contact temperature measurement was made possible without the necessity of taking into account the emissivity value, an original concept of the measurement method was developed, taking the advantage of thermal radiation laws – Planck’s law and Wien displacement law. The basic idea of the accepted method is the departure from amplitude recording (as in “conventional” pyrometry and thermovision) for linking of temperature recording with a maximum position in Planck’s curve. This article presents a novel approach that was used in the development of an original algorithm of temperature determination for performance of non-contact measurements of high temperature. The algorithm will enable to perform measurements without the necessity of introducing the emissivity value of a radiation source into a measurement instrument and will limit the impact of radiation absorption via the medium in which a measurement is being performed on the results of measurements. The applied methodology will allow conducting non-contact temperature measurements at a distance without the necessity of calibration the measuring device with regard to a blackbody.

3

Koncepcja metody i urządzenia do optycznego pomiaru wysokich temperatur

Lisiecka E., Passia H.

Pomiary Automatyka Kontrola

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2014

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R. 60, nr 5

272--274

PL

W artykule przedstawiono koncepcję metody i urządzenia do optycznego pomiaru wysokich temperatur. Zaprojektowane urządzenie pomiarowe pracuje w oparciu o prawa promieniowania cieplnego – prawo Plancka i prawo przesunięć Wiena. Proponowane rozwiązanie konstrukcyjne umożliwi pomiar temperatury eliminując wpływ amplitudowego przesunięcia charakterystyk emisyjnych. Możliwe będzie wykonanie pomiarów bez znajomości emisyjności źródła promieniowania oraz w ośrodku absorbującym promieniowanie. Przeprowadzone testy zdolności transmisyjnych zaprojektowanego układu optycznego, potwierdziły możliwość jego wykorzystania w urządzeniu.

EN

High-temperature measurements are a key parameter for control of various technological processes and research. The most common instruments used in measurements of high temperature are different types of pyrometers and infrared cameras. In the literature there is a wide variety of construction of these optical devices [1-6]. This paper presents a concept of an alternative optical method and apparatus for measurements of high temperatures. The designed sensor is based on thermal radiation law – Planck’s law and Wien’s displacement law (Section 2.1). The object temperature is determined by fitting the Planck’s curve to the measurement data, determining the wavelength of the curve maximum and calculating the temperature using Wien’s displacement law (Fig. 2). This solution permits eliminating the influence of curve amplitude shifts caused by the object emissivity, selection absorption in the infrared range and absorption thermal radiation by optical elements in the device. This device consists of two main parts (Fig. 3): an optical system and a spectrometer connected to optic fiber. At first, tests of power loses in the device optical system were carried out at different configuration of the system elements and utilizing the He-Ne laser (Section 4). The obtained results demonstrate the possibility of using the designed optical system in the device. In the near future there will be performed more tests of the equipment and work aiming at improving its detectable capability.

4

The evolution of Thermo-Wet - the computerized system for measurements of surface properties

Strzecha K., Bąkała M., Fabijańska A., Koszmider T.

Automatyka / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie

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2010

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T. 14, z. 3/1

525-535

EN

The evolution of Thermo-Wet measurement system was presented. Its history and current state were described. The paper focused mainly on the new ideas in the high temperature computerized measurements of wetting angle and surface tension. The main goals of given ideas are to expand the usability of measurement stand and to improve the accuracy and repeatability of the measurement results.

PL

W artykule przedstawiony został rozwój stanowiska pomiarowego Thermo-Wet. Została opisana jego historia i stan obecny. Główny nacisk położono na prezentacje najnowszych rozwiązań w wysokotemperaturowych pomiarach napięcia powierzchniowego i kątów zwilżania. Głównymi celami ich wprowadzenia jest rozszerzenie funkcjonalności stanowiska pomiarowego i zwiększenie dokładności oraz powtarzalności uzyskiwanych wyników.

5

Nowe algorytmy analizy kształtu kropli w pomiarach napięcia powierzchniowego oraz kąta zwilżania metali w wysokich temperaturach

Koszmider T., Bąkała M.

Automatyka / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie

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2009

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T. 13, z. 3/1

901-909

PL

W niniejszym artykule przedstawiono nowe algorytmy analizy kształtu kropli metali. Dotyczą one wykorzystania metod przetwarzania i analizy obrazów cyfrowych w procesie pomiaru kąta zwilżania oraz napięcia powierzchniowego materiałów znajdujących się w wysokich temperaturach.

EN

New metal's drop shape analysis algorithms are presented in this paper. They concern utilization of digital image processing and analysis methods in process of wetting tension and contact angle measurements at high temperatures.