基于光散射法和电荷感应法融合的粉尘浓度检测技术

为了减小粉尘浓度在线检测误差，分析光散射法和电荷感应法的基本原理，揭示两种方法的局限性；将光散射子单元和电荷感应子单元的结构和数据融合，研制并联自动切换的融合单元，提出一种粉尘浓度融合检测算法.实验发现:融合单元的检测误差≤11.3%，比光散射子单元小3.6%，比电荷感应子单元小3.5%；融合单元的平均标定分辨率为112.8，是光散射子单元的1.27倍，是电荷感应子单元的4.68倍；融合单元的标定线性度最好.表明融合技术克服了光散射法和电荷感应法的局限性，进一步减小了检测误差和提高了标定分辨率、线性度.

Dust Concentration Detection Technology Based on Fusion of Light Scattering Method and Charge Induction Method

In order to reduce on-line detection error of dust concentration， the basic principles of light scattering method and charge induction method were analyzed， and the limitations of the two methods were revealed. The structure and data of the light scattering subunit and charge induction subunit were fused， and a parallel automatic switching fusion subunit was developed. A dust concentration fusion detection algorithm was proposed. The experimental results showed that the detection error of the fusion subunit was ≤11.3%， 3.6% smaller than that of the light scattering subunit， and 3.5% smaller than that of the charge induction subunit. The average calibration resolution of the fusion subunit was 112.8， 1.27 times that of the light scattering subunit and 4.68 times that of the charge induction subunit. The calibration linearity of fusion subunit was the best. It was proved that the fusion technique overcame the limitation of light scattering method and charge induction method， further reduced the detection error and improved the calibration resolution and linearity.