RT Journal Article
SR Electronic
A1 Liu, Junjie
A1 Yu, Laihua
A1 Ye, Jing
A1 Huang, Zhihuang
A1 Lu, Jiazhen
A1 Liu, Yue
T1 Development of Particulate Matter Monitors based on Light Scattering Method
JF Manufacturing Technology Journal
YR 2023
VO 23
IS 6
SP 989
OP 998
DO 10.21062/mft.2023.110
UL https://journalmt.com/artkey/mft-202306-0026.php
AB PM2.5 and PM10 measurement technique based on light scattering usually exhibit inaccurate measurement results in their applications. For improving the reliability of this method for PM2.5 and PM10 measurement, systematic research on the structure optimization of single particle light scattering sensors (SPLSS), calibration of SPLSS, and PM2.5/PM10 monitor development are carried out. Frist, by simulating and optimizing light scattering parameters, light scattering signals varied monotonically with particle size could be obtained, and thereby capability of accurate size-identifying can be established. Then, by developing threshold comparison circuit and calibration device, particle size channel of SPLSS or monitor could be divided, and particle counting efficiency could be corrected. Finally, by obtaining empirical values of parameters, i.e., heating temperature, particle density, involved in the developed dynamic heating system and PN-PM algorithm, interference of humidity and particle characteristics can be effectively eliminated, thus particle mass concentration (PM) could be calculated according to particle number concentration (PN) in each channel. The results show that the developed monitor has good accuracy by comparing it in atmospheric air with reference methods of PM2.5/PM10.