颗粒物数量与粒径分布的光学测量系统设计
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Design of optical measuring system for particlequantity and size distribution
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    摘要:

    针对颗粒粒径和数量同时测量的问题,在Mie散射理论的基础上,提出将角散射颗粒计数法和小角前散射法相结合,设计出一种能实时测量颗粒物粒径和数量的光学传感器。基于光电二极管采集到的光电流范围,用信噪比为518dB的放大器电路对电流采样,从而实现较高计数效率。针对散射光能分布和颗粒粒径之间的关系式,推导出目标函数,并引入天牛须算法对其进行优化。实验结果表明该传感器浓度测量数据与实际浓度值变化趋势高度一致,相关性在099以上,相对误差在10以内,颗粒粒径反演误差较低。从而验证了所设计的颗粒物传感器系统的实用性。

    Abstract:

    Aiming at the problem of simultaneous measurement of particle size and quantity,on the basis of Mie scattering theory,an optical sensor which can measure the size and quantity of particles in real time is designed by combining the angular scattering particle counting method and the small angle forward scattering method.Based on the photocurrent range collected by the photodiode,an amplifier circuit with a signal to noise ratio of 51.8 dB is used to sample the current to achieve higher counting efficiency.According to the relationship between the scattered light energy distribution and the particle size,the objective function is derived,and the long beetle algorithm is introduced to optimize it.The experimental results show that the concentration measurement data of the sensor is highly consistent with the actual concentration value change trend,with a correlation above 0.99,a relative error within 10%,and a low particle size inversion error.Thus,the utility of designed particle sensor system is verified.

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杨安,张子同,汤思达,姜岩峰.颗粒物数量与粒径分布的光学测量系统设计[J].激光与红外,2022,52(3):392~398
YANG An, ZHANG Zi-tong, TANG Si-da, JIANG Yan-feng. Design of optical measuring system for particlequantity and size distribution[J]. LASER & INFRARED,2022,52(3):392~398

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  • 在线发布日期: 2022-03-22