大量程浊度测量的散射角实验研究  

Experimental study of scattering angle for large-scale turbidity measurement

作　　者：甄理 葛乃义 张海韬 郑叶龙[1] 赵美蓉[1] 黄银国[1] ZHEN Li;GE Naiyi;ZHANG Haitao;ZHENG Yelong;ZHAO Meirong;HUANG Yinguo(State Key Laboratory of Precision Measurement Technology and Instruments,Tianjin University,Tianjin 300072,China)

机构地区：[1]天津大学精密测试技术及仪器国家重点实验室,天津300072

出　　处：《应用光学》2024年第4期768-773,共6页Journal of Applied Optics

摘　　要：浊度对于评价水体质量具有重要的意义。针对90°散射法在高浊度范围测量误差大、分辨率低的问题,提出了一种135°散射大量程浊度测量方法。由于散射相位函数与散射角密切相关,实验研究了散射角的浊度测量适应性。通过多项式拟合阶次分析发现,在100 NTU~2000 NTU范围内单一散射条件下,135°散射法具有更大的量程范围。经过实验标定,分段线性拟合的R^(2)结果分别为0.99(100 NTU~800 NTU),0.98(800 NTU~1500 NTU)和0.99(1500 NTU~2000 NTU)。实验证明,135°散射法可以扩大浊度测量范围,改善高浊度范围内测量精度。Turbidity is of great significance for evaluating water quality.Addressing the issue of large measurement errors and low resolution encountered with the 90°scattering method in high turbidity scenarios,an advanced turbidity measurement technique utilizing 135°scattering was introduced,suitable for a wide range of turbidity.Since the scattering phase function was closely related to the scattering angle,the turbidity measurement adaptability of the scattering angle was studied by experiment.The analysis,conducted through polynomial fitting order,revealed that the 135°scattering method demonstrated a more extensive measurement range,particularly effective in the 100 NTU~2000 NTU range.The method underwent rigorous experimental R^(2)calibration,yielding segmented linear fitting results of 0.99 for 100 NTU~800 NTU,0.98 for 800 NTU~1500 NTU,and 0.99 for 1500 NTU~2000 NTU.Experimental results show that the 135°scattering approach can extend the turbidity measurement range and improve the precision of measurements in high-turbidity conditions.

关 键 词：浊度 散射角 散射相位函数 大量程 

分 类 号：TN247[电子电信—物理电子学]