- Tytuł:
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Uwagi o dokładności pomiarów termograficznych w budownictwie
Remarks on the accuracy of thermovision measurements in building engineering - Autorzy:
- Wróbel, A.
- Powiązania:
- https://bibliotekanauki.pl/articles/154462.pdf
- Data publikacji:
- 2011
- Wydawca:
- Stowarzyszenie Inżynierów i Techników Mechaników Polskich
- Tematy:
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różnica temperatury
dokładność pomiaru
współczynnik przenikania ciepła
temperature difference
measurement accuracy
thermal transmittance - Opis:
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Ilościowe pomiary termograficzne w budownictwie wymagają bardzo dokładnego określenia różnicy temperatury powierzchni ściany i powietrza w jej sąsiedztwie. Autorzy analizują czynniki mające wpływ na dokładność pomiarów. Przedstawiają dokładności pomiarów
Determination of a wall thermal transmittance requires precise measurements of the difference between temperatures of air and wall surface. One of possible ways to do it is a thermographic survey. In this paper the authors present factors that affect accuracy of such measurements. Two thermographic cameras manufactured by FLIR - ThermaCAM S60 and ThermaCAM P620 were examined. The following values were measured (100 measurements at 3-minute intervals): temperatures of the wall surface and a sheet of paper in a room under stable conditions (Figs. 2 and 3). The results of single measurements were compared with the average values from the measurement period. The standard deviation was: σ = 0.035÷0.045 K - temperature measured in the area on a thermogram; σ = 0.01 K - difference between temperatures of two areas on the same thermogram; σ = 0.065÷0.08 K - temperature measured in a single point on a thermogram; σ = 0.08 K - difference between temperatures of two points on the same thermogram (Tab. 1). The temperatures of the air and wall surface change vertically, therefore they should be measured on the same height. It is very important to maintain stable conditions in a room where the measurements are taken. The measured values are noticeably disturbed in the following circumstances: when people enter the room (Fig. 8), when light is turned on (Fig. 9), when dif-fused sunlight falls through a curtained window (Fig. 10). - Źródło:
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Pomiary Automatyka Kontrola; 2011, R. 57, nr 10, 10; 1187-1190
0032-4140 - Pojawia się w:
- Pomiary Automatyka Kontrola
- Dostawca treści:
- Biblioteka Nauki