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Development and Evaluation of a Particle Deposition Measurement Method Based on a CCD Imaging Chip

Category: Aerosol Physics and Instrumentation

Accepted Manuscripts
DOI: 10.4209/aaqr.2019.03.0160
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Junyi Zhuang1, Fei Li 1, Feifei Dong1, Jianlin Ren2, Bin Zhou1

  • 1 Department of HVAC, College of Urban Construction, Nanjing Tech University, Nanjing 210009, China
  • 2 School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China

Highlights

  • Proposed an easy and low cost method to measure the particle deposition.
  • Compared the deposition amounts from the CCD chip with the measured concentrations.
  • Analyzed the discrepancies between the measurement and theory calculation.

Abstract

The particle deposition on indoor surfaces have lately received great attention due to increasing concern about the effects of particle exposure on human health. In this study, we developed an easy and low-cost method to measure the deposition amount of different-size particles, and we evaluated this method through the particle concentration measurement and theory calculation. A clean charge coupled device (CCD) chip was exposed to air and received the deposition of particles. After a sedimentation period, the images generated from the CCD were analyzed, and the amounts of each particle type (> 2 μm) were identified based on their different pixel sizes. We also measured the concentrations of particles with different sizes around the chip during the sedimentation and compared the relationship to the number of settled particles. The results show that this method can obtain the particle deposition amount during a period and that there is a positive correlation between the deposition amounts and the particle number concentrations.

Keywords

Particle deposition Image recognition MATLAB CCD


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