Pre-Deployment Testing, Augmentation and Calibration of Cross-Sensitive Sensors

Over the past few years, many low-cost pollution sensors have been integrated into measurement platforms for air quality monitoring. However, using these sensors is challenging: concentrations of toxic gases in ambient air often lie at sensors’ sensitivity boundaries, environmental conditions affect the sensor signal, and the sensors are crosssensitive to multiple pollutants. Datasheet information on these effects is scarce or may not cover deployment conditions. Consequently the sensors need to undergo extensive pre-deployment testing to examine their feasibility for a given application and to find the optimal measurement setup that allows accurate data collection and calibration. In this work, we propose a novel method to conduct infield testing of low-cost sensors. The algorithm proposed is based on multiple least-squares and leverages the physical variation of urban air pollution to quantify the amount of explained and unexplained sensor signal. We verify (i) whether a sensor ...

• Type: Journal
• Year: 2016
• Where: EWSN
• Authors: Balz Maag, Olga Saukh, David Hasenfratz, Lothar Thiele
• Keywords: Computer Networks, EWSN 2016