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Evaluation of the size-of-source effect in thermal imaging cameras
ID
Pušnik, Igor
(
Avtor
),
ID
Geršak, Gregor
(
Avtor
)
PDF - Predstavitvena datoteka,
prenos
(8,31 MB)
MD5: 35E544CD2E6633C4C57AA4AB94AFF29A
URL - Izvorni URL, za dostop obiščite
https://www.mdpi.com/1424-8220/21/2/607
Galerija slik
Izvleček
In numerous applications, including current body temperature monitoring in viral pandemic management, thermal imaging cameras are used for quantitative measurements. These require determination of the measurement accuracy (error) and its traceability (measurement uncertainty). Within error estimation, the size-of-source effect (SSE) is an important error source. The SSE is the relation between the physical size of a target and the instrument’s nominal target size. This study presents a direct evaluation of the error due to the SSE. A stable and uniform temperature, generated by blackbodies, was measured by a high-quality thermal imager. To limit the generated radiation, custom-made blocking tiles with different apertures were used. Effects of aperture shapes and positions, camera-target distances and temperature levels on the error were investigated. The study findings suggest that due to the SSE the measured temperatures are too low, especially at longer camera-target distances. The SSE error depends on the number of pixels available and included into the region of interest, for which the accurate measurement is about to be performed. For an accurate temperature measurement, an array of at least 10 × 10 pixels should be exposed to the observed target radiation, while 3 × 3 central pixel area should be included in the temperature calculation.
Jezik:
Angleški jezik
Ključne besede:
temperature
,
thermal imaging camera
,
accuracy
,
size-of-source effect
,
SSE
,
region of interest
,
ROI
Vrsta gradiva:
Članek v reviji
Tipologija:
1.01 - Izvirni znanstveni članek
Organizacija:
FE - Fakulteta za elektrotehniko
Status publikacije:
Objavljeno
Različica publikacije:
Objavljena publikacija
Leto izida:
2021
Št. strani:
22 str.
Številčenje:
Vol. 21, iss. 2, art. 607
PID:
20.500.12556/RUL-134901
UDK:
621.317
ISSN pri članku:
1424-8220
DOI:
10.3390/s21020607
COBISS.SI-ID:
47911683
Datum objave v RUL:
10.02.2022
Število ogledov:
968
Število prenosov:
146
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Objavi na:
Gradivo je del revije
Naslov:
Sensors
Skrajšan naslov:
Sensors
Založnik:
MDPI
ISSN:
1424-8220
COBISS.SI-ID:
10176278
Licence
Licenca:
CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
Povezava:
http://creativecommons.org/licenses/by/4.0/deed.sl
Opis:
To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
Začetek licenciranja:
16.01.2021
Sekundarni jezik
Jezik:
Slovenski jezik
Ključne besede:
temperatura
,
termovizijske kamere
,
točnost
,
učinek velikosti vira
,
SSE
,
področje zanimanja
,
ROI
Projekti
Financer:
ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:
P2-0225
Naslov:
Metrologija in kakovost
Financer:
Drugi - Drug financer ali več financerjev
Program financ.:
Republic of Slovenia, Ministry of Economic Development and Technology, Metrology Institute
Številka projekta:
6401-18/2008/70
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