10.14489/td.2021.09.pp.026-032

2021, 09 September

DOI: 10.14489/td.2021.09.pp.026-032

Golobokov M. V.
METROLOGICAL SUPPORT FOR THE VERIFICATION OF MEDICAL INFRARED THERMOMETERS
(pp. 26-32)

Abstract. The paper analyzes two methods of checking medical infrared thermometers – using the black body model and using the gray body model. The use of black body models provides the highest accuracy of temperature reproduction. Direct verification of infrared thermometers is not possible due to the discrepancy between the emissivity value entered in the infrared thermometer and the emissivity value of the black body. In this paper, we propose an algorithm for calculating corrections to the value of the temperature reproduced by the black body. The values of the corrections for different temperatures and emissivity introduced in infrared thermometers are given. Using the gray body model does not require any additional calculations. A model of a gray body with an emissivity from 0.94 to 0.99 has been developed and studied. The advantage of the proposed design is low cost, ease of practical application, and the possibility of simultaneous verification of infrared thermometers with different set emissivity values. For each of the methods, an algorithm for estimating the measurement uncertainty during verification is proposed. The results of the research can be used in testing medical infrared thermometers for type approval and the development of verification methods.

Keywords: infrared thermometer, black body, gray body, measurement uncertainty.

+ - About the Authors Click to collapse

M. V. Golobokov (State regional Center of Standardization, Metrology and Testing in the Novosibirsk region, Novosibirsk, Russia) E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.

+ - References Click to collapse

1. State verification schedule for temperature measuring instruments. (2012). Ru Standard No. GOST 8.558–2009. Moscow: Standartinform. [in Russian language]
2. Golobokov M. V. (2017). Blackbody model based on the "TERMOTEST-05-02" thermostat. Kontrol'. Diagnostika, (11), pp. 40 – 44. [in Russian language] DOI: 10.14489/td.2017.11.pp.040-044
3. Ogarev S. A., Hlevnoy B. B., Lisyanskiy B. E. et al. (2015). Precision low and medium temperature blackbody models for radiometry and radiation thermometry. Izmeritel'naya tekhnika, (11), pp. 48 – 55. [in Russian language]
4. Medical electronic infrared thermometers. (2004). Verification method No 54700–13. Moscow: FGUP «VNIIOFI». [in Russian language]
5. Standard Specification for Infrared Thermometers for Intermittent Determination of Patient Temperature No. ASTM E1965–98. (2003). USA: ASTM International.
6. Gossorg Zh. (1988). Infrared thermography. Basics, technique, application. Moscow: Mir. [in Russian language]
7. Minkina W., Dudzik. S. (2009). Infrarad Thermograpy. Errors and Uncretainties. New York: John Wiley & Sons.
8. Means for non-contact temperature measurement. (2017). Calibration procedure No. MK 03-73–17. Novosibirsk: FBU «Novosibirskiy TsSM». [in Russian language]
9. Prokhorov A. V., Hanssen L. M. (2010). Effective emissivity of a cylindrical cavity with an inclined bottom: II. Non-isothermal cavity. Metrologia, 47, pp. 33 – 46.
10. Prokhorov A. V., Hanssen L. M. (2004). Effective emissivity of a cylindrical cavity with an inclined bottom: I. isothermal cavity. Metrologia, 41, pp. 421 – 431.
11. Virial company. Available at: http://www.virial.com/steep321.html (Accessed: 15.01.2021).

+ - Purchase digital version of a single article Click to collapse

This article is available in electronic format (PDF).

The cost of a single article is 450 rubles. (including VAT 18%). After you place an order within a few days, you will receive following documents to your specified e-mail: account on payment and receipt to pay in the bank.

After depositing your payment on our bank account we send you file of the article by e-mail.

To order articles please copy the article doi:

10.14489/td.2021.09.pp.026-032

and fill out the form