TY - GEN
T1 - Novel sensor cell design and algorithm to online realize stable and cost effective optical concentration measurements at fluctuating light source situations
AU - Degner, M.
AU - Ewald, H.
AU - Lewis, E.
PY - 2011
Y1 - 2011
N2 - The spectroscopic optical absorption technique is widely used for estimation of substance concentration. It is based on the wavelength specific determination of light extinction in an absorption cell that is caused by the interaction of light with the molecules of the claimed substance. The absorption measurement is an indirect method because a light attenuation (often only at a few spectral measurement points) is used. This measurement is not only influenced by the substance absorption but also unwanted by disturbances and changes of light emission, guiding and receiving. New optical methods for realizing an online reference for a robust absorption measurement has been designed and investigated. Compared to commonly used methods the designed technique is not complex but effective and also well suited for small sensor application. The utilized concept is based on the variation of the effective absorption path length within a sensor cell in a simple way. Stable absorption measurements at the presence of strong spectral changes of the light source intensity are shown here to demonstrate the potential of the developed technique.
AB - The spectroscopic optical absorption technique is widely used for estimation of substance concentration. It is based on the wavelength specific determination of light extinction in an absorption cell that is caused by the interaction of light with the molecules of the claimed substance. The absorption measurement is an indirect method because a light attenuation (often only at a few spectral measurement points) is used. This measurement is not only influenced by the substance absorption but also unwanted by disturbances and changes of light emission, guiding and receiving. New optical methods for realizing an online reference for a robust absorption measurement has been designed and investigated. Compared to commonly used methods the designed technique is not complex but effective and also well suited for small sensor application. The utilized concept is based on the variation of the effective absorption path length within a sensor cell in a simple way. Stable absorption measurements at the presence of strong spectral changes of the light source intensity are shown here to demonstrate the potential of the developed technique.
UR - http://www.scopus.com/inward/record.url?scp=84856831479&partnerID=8YFLogxK
U2 - 10.1109/ICSENS.2011.6127049
DO - 10.1109/ICSENS.2011.6127049
M3 - Conference contribution
AN - SCOPUS:84856831479
SN - 9781424492886
T3 - Proceedings of IEEE Sensors
SP - 1950
EP - 1953
BT - IEEE Sensors 2011 Conference, SENSORS 2011
T2 - 10th IEEE SENSORS Conference 2011, SENSORS 2011
Y2 - 28 October 2011 through 31 October 2011
ER -