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Development of IoT-based PM2.5 Measuring Device

사물인터넷 기반 초미세먼지(PM2.5) 측정 장치 개발

  • Received : 2017.01.11
  • Accepted : 2017.02.13
  • Published : 2017.02.28

Abstract

An IoT-based particulate matter (PM2.5) sensing device (PSD) is developed. The PSD consists of a PM2.5 sensor, signal processing circuit, and wi-fi enabled-microprocessor along with temperature and humidity sensors. The PSD estimates PM2.5 density by measuring light scattered by PM2.5. To gauge performance of the PSD, PM2.5 density of open air was measured with the PSD and compared with that of the collocated-government-certified measuring station. Measurements were taken at a sampling frequency of 100 Hz and moving-averaged to remove measurement noise. When compared to the result of the measuring station, average percentile error of PM2.5 density from the PSD is found to be 31%. A correlation coefficient is found to be 0.72 which indicates a strong correlation. Instantaneous variation, however, may far exceed average errors, leading to a conclusion that the PSD is more suitable for estimating average trend of PM2.5 density variations than estimating instantaneous PM2.5 density.

Keywords

internet of things;PM2.5;sensor network;CC3200 micro-processor;moving-average

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Acknowledgement

Supported by : 한성대학교