Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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Development of IoT-based PM2.5 Measuring Device

사물인터넷 기반 초미세먼지(PM2.5) 측정 장치 개발

  • Loh, Byoung Gook (Department of IT Applied Engineering, Hansung University) ;
  • Choi, Gi Heung (Department of Mechanical Systems Engineering, Hansung University)
  • 노병국 (한성대학교 IT응용시스템공학과) ;
  • 최기흥 (한성대학교 기계시스템공학과)
  • Received : 2017.01.11
  • Accepted : 2017.02.13
  • Published : 2017.02.28
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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.

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References

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