Hegemann, T. ; Balasus, J. ; Trinh, Q. V. ; Herzog, A. ; Khanh, T. Q. (2022)
Using spectral sensors to determine photosynthetic photon flux density in daylight - A theoretical approach.
In: Lighting Research & Technology, 54 (5)
doi: 10.1177/14771535221077881
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Precise determination of the photosynthetic photon flux density (PPFD) is important for illumination in modern horticultural systems. This paper presents two methods to calculate the PPFD of daylight spectra using low cost optic sensors. The first method uses the spectral sensitivity functions of spectral sensors to recreate the quantum sensitivity curve of quantum sensors. Two sets of spectral sensitivity functions are compared. The second method calculates the PPFD based on the calculated correlated colour temperature and a spectral reconstruction using the CIE daylight model. It is demonstrated that all methods offer a useful estimation of the PPFD with correspondingly similar daylight spectra, but the supposedly simpler method, which is based on weighting of the individual channels, is more stable against deviations from the CIE daylight model.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2022 |
| Autor(en): | Hegemann, T. ; Balasus, J. ; Trinh, Q. V. ; Herzog, A. ; Khanh, T. Q. |
| Art des Eintrags: | Bibliographie |
| Titel: | Using spectral sensors to determine photosynthetic photon flux density in daylight - A theoretical approach |
| Sprache: | Englisch |
| Publikationsjahr: | 1 August 2022 |
| Verlag: | SAGE Publications |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Lighting Research & Technology |
| Jahrgang/Volume einer Zeitschrift: | 54 |
| (Heft-)Nummer: | 5 |
| DOI: | 10.1177/14771535221077881 |
| Kurzbeschreibung (Abstract): | Precise determination of the photosynthetic photon flux density (PPFD) is important for illumination in modern horticultural systems. This paper presents two methods to calculate the PPFD of daylight spectra using low cost optic sensors. The first method uses the spectral sensitivity functions of spectral sensors to recreate the quantum sensitivity curve of quantum sensors. Two sets of spectral sensitivity functions are compared. The second method calculates the PPFD based on the calculated correlated colour temperature and a spectral reconstruction using the CIE daylight model. It is demonstrated that all methods offer a useful estimation of the PPFD with correspondingly similar daylight spectra, but the supposedly simpler method, which is based on weighting of the individual channels, is more stable against deviations from the CIE daylight model. |
| Fachbereich(e)/-gebiet(e): | 18 Fachbereich Elektrotechnik und Informationstechnik 18 Fachbereich Elektrotechnik und Informationstechnik > Lichttechnik (ab Okt. 2021 umbenannt in "Adaptive Lichttechnische Systeme und Visuelle Verarbeitung") |
| Hinterlegungsdatum: | 05 Mai 2022 07:39 |
| Letzte Änderung: | 23 Aug 2022 09:20 |
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