Empowering smartphone users with sensor node for air quality measurement

7th Sensors & their Applications

Oletic, Dinko^1 ; Bilas, Vedran^1

University of Zagreb, Faculty of Electrical Engineering and Computing, Unska 3, HR-10000 Zagreb, Croatia^1

关键词: Air quality measurements;    Laboratory conditions;    Metal oxide semiconductor gas sensors;    Participatory Sensing;    Sensing circuits;    Sensor interface;    Temperature and humidities;    Urban environments;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/450/1/012028/pdf
DOI  :  10.1088/1742-6596/450/1/012028

来源: IOP

【 摘 要 】

We present an architecture of a sensor node developed for use with smartphones for participatory sensing of air quality in urban environments. Our solution features inexpensive metal-oxide semiconductor gas sensors (MOX) for measurement of CO, O3, NO2and VOC, along with sensors for ambient temperature and humidity. We focus on our design of sensor interface consisting of power-regulated heater temperature control, and the design of resistance sensing circuit. Accuracy of the sensor interface is characterized. Power consumption of the sensor node is analysed. Preliminary data obtained from the CO gas sensors in laboratory conditions and during the outdoor field-test is shown.