DocumentCode :
3721690
Title :
New setup for a real time high resolution UV-LED absorption spectroscopy
Author :
Eric Ebert;Hendrik Krüger;Marian Rabe;Nils Damaschke;Hartmut Ewald
Author_Institution :
Institute of General Electrical Engineering, University of Rostock, Rostock, Germany
fYear :
2015
Firstpage :
1
Lastpage :
2
Abstract :
A real time, high resolution LED based, spectroscopic gas concentration measurement system is presented. This kind of measuring techniques was enabled by the advances in the fabrication of ultraviolet LEDs (UV-LEDs). The system presented here has a relatively compact design and small application efforts. Different hardware setups have been evaluated to design a system for real time high resolution LED absorption spectroscopy. Applied are two concave mirrors, two photo detector diodes and a 405nm LED mounted in a small device. A standard low power microcontroller was applied as signal processor. The few, robust, reasonable priced components enables high volume applications for this sensor. Different optical simulations provide optimized system parameters for gas concentration measurements in the low ppm range. NO2 concentrations of 200 ppm have been measured with a resolution of ~1.5% counts (16-Bit-ADC). Therefore the ppb range becomes an available measurement range with higher ADC-Resolutions.
Keywords :
"Light emitting diodes","Biomedical measurement","Optical fibers","Optical fiber sensors","Absorption","Electrical resistance measurement"
Publisher :
ieee
Conference_Titel :
SENSORS, 2015 IEEE
Type :
conf
DOI :
10.1109/ICSENS.2015.7370223
Filename :
7370223
Link To Document :
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