China Safety Science Journal ›› 2020, Vol. 30 ›› Issue (6): 37-42.doi: 10.16265/j.cnki.issn1003-3033.2020.06.006

• Safety engineering technology • Previous Articles     Next Articles

Application research of light scattering principle in dust measurement system

FU Shigen1,2, LI Quanming1,2, HU Jiaguo1,2, DONG Hewei3   

  1. 1. China Academy of Safety Science and Technology, Beijing 100012, China;
    2. Key Laboratory of Mining Goaf Disaster Prevention and Control of Ministry of Emergency Management, Beijing 100012, China;
    3. Mining Company of Shougang Group Co., Ltd., Qian'an Hebei 064404,China
  • Received:2020-03-17 Revised:2020-05-28 Online:2020-06-28 Published:2021-01-28

Abstract: In order to prevent harm caused by respiratory dust and to monitor mass concentration of individual exhalation dust, a portable personal concentration monitoring test prototype was developed by using infrared light emitting photodiode as a light source according to principle of light scattering, and its pneumatic control circuit and optical control and detection circuit were designed.Then, prototype and comparison instrument were put in a self-made dust test device together with dust gas which featured a flow rate of 2 L/min and a particle size of 5 μm. The results show that when mass concentration of dust is between 0-150 mg/m3, measured voltage of prototype increases along with increase of dust concentration, and they maintain a good linear relationship. The relative error between measured concentration value of prototype by using regression equation and that of comparison instrument is within ±4%, indicating that the device meets requirements of relevant dust verification regulations.

Key words: light scattering, respiratory dust, dust mass concentration, individual monitor, linear relationship

CLC Number: