TY - GEN
T1 - Advanced embedded control and data acquisition systems for laser-based quartz-enhanced photoacoustic spectroscopy
AU - So, Stephen G.
AU - Al Rifai, Omar
AU - Wysocki, Gerard
AU - Kosterev, Anatoliy A.
AU - Tittel, Frank K.
PY - 2007/12/1
Y1 - 2007/12/1
N2 - This work describes the development of low-power embedded systems for miniature quartz-enhanced photoacoustic spectroscopy (QEPAS) laser based trace gas sensors. Such sensors must address the following functions simultaneously: 1) laser current control, 2) laser temperature control, 3) multi-harmonic quadrature lock-in amplification, and 4) digital data processing. Currently used methods for control and acquisition result in shoebox sized sensors requiring ∼3 to 4W of electrical power consumption, which is too high for portable energy harvesting powered monitoring. In order to improve sensors to meet required size and cost demands of portable health monitors and environmental sensor networks, we have consolidated and minimized the necessary processing resources for QEPAS sensors. Our processing system has been reduced to a single 10cm × 6.5cm circuit board constructed entirely from low-cost off-the-shelf components, and achieves power consumption of ∼0.2W.
AB - This work describes the development of low-power embedded systems for miniature quartz-enhanced photoacoustic spectroscopy (QEPAS) laser based trace gas sensors. Such sensors must address the following functions simultaneously: 1) laser current control, 2) laser temperature control, 3) multi-harmonic quadrature lock-in amplification, and 4) digital data processing. Currently used methods for control and acquisition result in shoebox sized sensors requiring ∼3 to 4W of electrical power consumption, which is too high for portable energy harvesting powered monitoring. In order to improve sensors to meet required size and cost demands of portable health monitors and environmental sensor networks, we have consolidated and minimized the necessary processing resources for QEPAS sensors. Our processing system has been reduced to a single 10cm × 6.5cm circuit board constructed entirely from low-cost off-the-shelf components, and achieves power consumption of ∼0.2W.
UR - http://www.scopus.com/inward/record.url?scp=48349138066&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=48349138066&partnerID=8YFLogxK
U2 - 10.1109/ICSENS.2007.4388643
DO - 10.1109/ICSENS.2007.4388643
M3 - Conference contribution
AN - SCOPUS:48349138066
SN - 1424412617
SN - 9781424412617
T3 - Proceedings of IEEE Sensors
SP - 1279
EP - 1282
BT - The 6th IEEE Conference on SENSORS, IEEE SENSORS 2007
T2 - 6th IEEE Conference on SENSORS, IEEE SENSORS 2007
Y2 - 28 October 2007 through 31 October 2007
ER -