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Točnost in merilna negotovost pri brezkontaktnem merjenju telesne temperature s termovizijskimi kamerami
ID Mlačnik, Vid (Author), ID Pušnik, Igor (Mentor) More about this mentor... This link opens in a new window

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Abstract
V magistrskem delu analiziram točnost, merilno negotovost in zanesljivost uporabe termovizijskih kamer pri presejalnem testiranju ljudi z namenom zaznave osebkov s povišano telesno temperaturo. V delu sprva preverim fizikalno podlago termovizije, ki zajema mnoge, realno neizvedljive predpostavke, ki kritično vplivajo na delovanje termovizije. Pri podrobnejšem pregledu človeka se za najprimernejše merilno mesto na obrazu izkažejo notranji kotički očes. Točnost meritve in z njo povezanega matematičnega modela je izračunana oz. ocenjena za štiri namenske in dva splošno-namenska sistema, pri tem pa se upošteva tako merilni inštrument kot merjenec, človek. Vsi doprinosi k negotovosti, ki jih je bilo za dane sisteme mogoče izmeriti, so sešteti v oceno skupne negotovosti pri merjenju in oceni telesne temperature, pri čemer skupne negotovosti ovrednotenih merilnih naprav močno presegajo proizvajalčevo navedeno oz. medicinsko željeno negotovost merjenja ±0,3 °C in segajo tudi do ±2 °C.

Language:Slovenian
Keywords:termovizija, merilna negotovost, emisivnost kože, presejalni test za telesno temperaturo
Work type:Master's thesis/paper
Organization:FE - Faculty of Electrical Engineering
Year:2020
PID:20.500.12556/RUL-119129 This link opens in a new window
Publication date in RUL:03.09.2020
Views:1469
Downloads:207
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Secondary language

Language:English
Title:Accuracy and measurement uncertainty of non-contact measurement of body temperature with thermal imaging cameras
Abstract:
In this paper, application of uncooled thermal imaging for human body temperature screening is evaluated in terms of accuracy, measurement uncertainty and reliability. Physical theory of contactless thermometry is first analysed for generalisations and assumptions, which often deviate from actual conditions and are practically impossible to assure. Human is further analysed as a measured subject, identifying eye cantus as the most appropriate facial measurement spot. Accuracy of skin temperature measurement and core body temperature assessment is calculated, taking into account both the measurement instrument and measured subject, the human. Results of measurement uncertainty analysis, gathered to the extent of available data, are added to common measurement uncertainty of the core body temperature measurement and assessment process. Theoretical combined uncertainty of the measurement is considerably higher than uncertainties claimed by manufacturers and required by medical specialists at ±0,3 °C and can be as high as ±2 °C.

Keywords:thermal imaging, measurement uncertainty, skin emissivity, human temperature screening

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