Dust Mass Concentration Detection Using Multi-angle Light Scattering Humidity Correction

To reduce detection error, a real-time humidity correction dust mass concentration detection technology is proposed. Analyze Mie scattering theory. Propose multi angle light scattering theory, and establish a mathematical model for real-time humidity correction dust mass concentration detection. Develop a multi-angle light scattering dust mass concentration detection unit. analyze the characteristics of moisture absorption and growth of coal dust particles based on the test preparation and test system, experimentally study the relationship between environmental humidity, dust particle size, and scattered light flux, establish a humidity correction factor algorithm, and propose a multi-angle light scattering humidity correction dust mass concentration detection technology; Finally, the humidity correction factor algorithm was written into the multi-angle light scattering dust mass concentration detection unit for comparative test verification. The test found that the detection error of the multi-angle light scattering dust mass concentration detection unit with humidity correction was
$\leq 10.6 \%$
, which was 3.3% smaller than the error without humidity correction.