Improving the accuracy of the NDIR-based CO₂ sensor for breath analysis

• Autorzy: Prokopiuk Artur , Bielecki Zbigniew , Wojtas Jacek

Identyfikatory

DOI

10.24425/mms.2021.138578

• Języki publikacji: EN

Abstrakty

EN

The paper presents an analysis and practical study of the temperature and pressure influence on a non-dispersive infrared (NDIR) sensor for measuring the concentration of carbon dioxide in human breath. This sensor is used for monitoring patients’ carbon dioxide (CO₂) in the exhaled air. High precision and accuracy of CO₂ concentration measurements are essential in air sampling systems for breath analysers. They, however, require an analysis of the influence of the human exhaled air pressure and temperature on the NDIR CO₂ sensor. Therefore, analyses of the changes in concentration were carried out at a pressure from 986 mbar to 1027 mbar and a temperature from 20°C to 36°C. Finally, corresponding correction coefficients were determined which allow to reduce the relative uncertainty of CO₂ sensor measurements results from 19% to below 5%.

Słowa kluczowe

EN

NDIR; CO2 sensors; breath analysis; absorption spectroscopy

• Wydawca: Komitet Metrologii i Aparatury Naukowej PAN
• Czasopismo: Metrology and Measurement Systems
• Rocznik: 2021
• Tom: Vol. 28, nr 4
• Strony: 803--812
• Opis fizyczny: Bibliogr. 19 poz., rys., tab., wykr., wzory

Twórcy

autor

Prokopiuk Artur

• Military University of Technology, Institute of Optoelectronics, 00-908 Warsaw, 2 Gen. Sylwestra Kaliskiego St.

autor

Bielecki Zbigniew

• Military University of Technology, Institute of Optoelectronics, 00-908 Warsaw, 2 Gen. Sylwestra Kaliskiego St.

autor

Wojtas Jacek

• Military University of Technology, Institute of Optoelectronics, 00-908 Warsaw, 2 Gen. Sylwestra Kaliskiego St.

Bibliografia

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Uwagi

1. The results of the research carried out in the laboratory of the Institute of Optoelectronics of the Military University of Technology have been published with the financial support of the project entitled “Development of structure technology for single-mode cascade lasers for applications in optical gas detection systems” (ID: 347510) no. TECHMATSTRATEG1/ 347510/15/NCBR/2018.

2. Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).