ON ACCURACY OF CONTACTLESS TEMPERATURE MEASUREMENT LIMITED BY UNKNOWN EMISSIVITY FACTOR
Journal Title: Вимірювальна техніка та метрологія - Year 2018, Vol 79, Issue 4
Abstract
The major error of temperature measurements of different objects is due to uncertainty of their emissivity factor value. And vice versa, for correct determination of a true temperature, using conventional temperature means (pyrometers, thermal image cameras), one has to know in advance the emissivity factor of the studied object’s surface or better to set its value in place immediately before a measurement. The latter is proposed by authors to significantly increase the accuracy of temperature measurement. Namely, it needs to change previously the temperature of the sensitive element of a measuring mean and carry out measurements. The similar procedure is performed under the unchanged temperature condition. The difference between temperature readings of the same point of the studied surface gives the possibility to compute an emissivity factor. It improves the measurement accuracy. Derived equations allow fulfilling the specified operation at different temperature differences of the sensitive element.
Authors and Affiliations
Svyatoslav Yatsyshyn, Pavlo Hamula, Andriy-Volodymyr Midyk, Chun Zhi Wang
Keywords
Related Articles
- EP ID EP533402
- DOI 10.23939/istcmtm2018.04.030
- Views 93
- Downloads 0
ОБҐРУНТУВАННЯ ЗАСТОСУВАННЯ КОЕФІЦІЄНТІВ ВАГОМОСТІ ДЛЯ КВАЛІМЕТРИЧНОЇ ОЦІНКИ ПАРТІЇ ПРОДУКЦІЇ
Variants of applying the weight coefficients, determined due to the components of qualimetric uncertainty, are under consideration. The expediency of employing such coefficients in the case of a different ratio of experi...
ВОЛОКОННО-ОПТИЧНІ ПЕРЕТВОРЮВАЧІ ТЕМПЕРАТУРИ НА ОСНОВІ СВІТЛОВОДА ТИПУ КВАРЦ-ГЛІЦЕРИН (SiО2-С3Н8О3)
Experimental researches about dependence of light losses are conducted in fibre lightguide of type quartz-glycerin (SiО2-С3Н8О3) from a temperature. This results give enable to offer the construction of fibre-optical tr...
ВЕКТОРНИЙ МЕТОД ОЦІНЮВАННЯ ЯКОСТІ
Vector method of production and service quality estimation through two criteria – a vector and a phase – is proposed.
АНАЛІЗ ПОХИБОК ПЕРЕТВОРЮВАЧА «АДМІТАНС - НАПРУГА» ДЛЯ ЗАСОБІВ ВИМІРЮВАННЯ ВІДНОСНИХ ПОКАЗНИКІВ ЯКОСТІ
The errors of measuring transformation are analysed "аadmittance - tension" for facilities of measuring of relative indexes of quality of products. The method of providing of the forecast errors of vectorial transformer...
ЗАСІБ ВИМІРЮВАННЯ ДИНАМІЧНОГО МОМЕНТУ ЕЛЕКТРОМОТОРІВ ТА АНАЛІЗ ЙОГО ТОЧНОСТІ
The mean of measuring of dynamic moment of electromotors is offered in the article, presented its static characteristic and analysed the main components of uncertainty.