Particle and aerosol research (한국입자에어로졸학회지)

Korean Association for Particle and Aerosol Research (한국입자에어로졸학회)
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Development and Performance Evaluation of a Real-time PM Monitor based on Optical Scattering Method

광산란방식을 이용한 미세먼지 실시간 모니터링 장치 개발 및 성능평가

  • Received : 2018.10.16
  • Accepted : 2018.11.30
  • Published : 2018.12.31
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Abstract

In this study, we have developed a real-time monitoring device for measuring PM10 and PM2.5 of ambient aerosol particles. The real-time PM monitor (SENTRY Dust Monitor) uses the optical scattering method and has 16 channels in particle size. The laboratory and field tests were carried out to evaluate the developed SENTRY Dust Monitor. Arizona Test Dust particles were used as test particles in the laboratory test and the field test was carried out at the Jongno-gu Observatory in Seoul. The measurements of PM10 and PM2.5 concentrations obtained by SENTTRY Dust Monitor were compared with Grimm Dust Monitor (Model 1.108) and a beta ray gauge. It was shown that the PM10 and PM2.5 concentrations obtained by SENTRY Dust Monitor agree well with that of the reference devices. Based on the results obtained in this study, it could be concluded that the SENTRY Dust Monitor can be used as a PM monitoring device for real-time monitoring of the ambient aerosols.

Keywords

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Fig. 1. Light scattering of optical particle measurement instruments

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Fig. 2. Spectrum of optical particle measurement instruments (SENTRY Dust Monitor) for particle detection

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Fig. 3. Simulation of the sampling air velocity in the optical chamber

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Fig. 4. Optical chamber to which the C type has been applied

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Fig. 5. Beam stopper: conical and oblique types

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Fig. 6. Optical chamber to which the C type and the conical beam stopper have been applied

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Fig. 7. Circuit diagram for PID control

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Fig. 8. Main control board for multi-channel

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Fig. 9. Optical chamber developed in this study

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Fig. 10. Experimental set-up for calibration and performance evaluation of a SENTRY Dust Monitor

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Fig. 11. Experimental set-up for a field test

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Fig. 12. Comparison of PM concentration between the 8 ch. and 16 ch. SENTRY Dust Monitors and the Grimm Dust Monitor

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Fig. 13. Performance evaluation of the 16 ch. SENTRY Dust Monitor compared with the Grimm Dust Monitor

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Fig. 14. Performance evaluation of the 16 ch. SENTRY Dust Monitor compared with the Grimm Dust Monitor under the hi-concentration condition

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Fig. 15. Comparison of PM10 and PM2.5 between a SENTRY Dust Monitor and a beta ray gauge

Table 1. Design parameters in the optical chamber

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Table 2. Cut-off diameter. for each channel

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References

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  1. 다중 선형 회귀에 의한 광산란 초미세먼지 측정기의 황사 보정 기법 vol.11, pp.8, 2021, https://doi.org/10.22156/cs4smb.2021.11.08.092