火灾烟与粉尘混合颗粒光散射矩阵特性研究

Study on light scattering matrix characteristics of fire smoke and dust mixed particles

非火灾颗粒引起的光电感烟探测器误报是火灾探测领域重点关注的问题。通过Lorenz-Mie理论计算水雾的光散射矩阵,并与光散射平台实验测量对比验证实验平台的可靠性。测量并对比分析了单一的黑碳颗粒、干扰粉尘颗粒及粉尘黑碳混合颗粒的光散射矩阵。结果表明,光散射矩阵的不同元素及不同角度可以有效区分单一的干扰颗粒以及黑碳与粉尘的混合颗粒。

Solving the false alarms of photoelectric smoke detectors caused by non-fire particles is a critical concern in fire detection.In this paper,the reliability of the experimental platform is verified by comparing the light scattering matrix of water mist calculated by Lorenz-Mie theory with the experimental measurement of the light scattering platform.The light scattering matrices of single black carbon particles,interfering dust particles and mixed particles of dust black carbon were then measured.The results show that the different elements and angles of the light scattering matrix can effectively distinguish single interfering particles and mixed particles of black carbon and dust.