基于紫外-可见光谱的水质COD在线检测系统设计  

Design of Water Quality COD Online Detection System Based on Ultraviolet-Visible Spectroscopy

作　　者：蔡嘉城 邓霄 阚崇轩 赵爽 Cai Jiacheng;Deng Xiao;Kan Chongxuan;Zhao Shuang(College of Physics and Optoelectronics,Taiyuan University of Technology,Taiyuan,Shanxi 030024,China;Key Laboratory of Advanced Transducers and Intelligent Control System,Ministry of Education and Shanxi Province,Taiyuan University of Technology,Taiyuan,Shanxi 030024,China)

机构地区：[1]太原理工大学物理与光电工程学院,山西太原030024 [2]太原理工大学新型传感器与智能控制教育部与山西省重点实验室,山西太原030024

出　　处：《激光与光电子学进展》2022年第1期339-346,共8页Laser & Optoelectronics Progress

基　　金：山西省重点研发计划资助项目(201903D321001)。

摘　　要：基于紫外-可见光谱技术,设计了一种可用于水质参数溶解氧(COD)实时在线检测的系统,介绍了系统的测量原理和总体结构(光路和电路)的设计。通过对水体COD的检测,测得了COD溶液的光谱数据,利用光谱数据建立了PLS算法预测模型和电压解算模型,并对两种模型的预测精度进行了对比。同时考虑到水体中的环境干扰因素,重点分析了浊度、温度对COD测量结果的影响,并对所构建模型进行了补偿和校正,提高了系统的检测精度。实验结果表明,相比传统的水质COD检测方法,该系统实现了快速、高精度和实时在线检测的目的。Based on ultraviolet-visible spectroscopy technology,a system that can be used for real-time online detection of water quality parameters dissolved oxygen(COD)was designed,and the measurement principle and overall structure(light path and circuit)design of the system were introduced.By detecting the COD of the water body,the spectral data of the COD solution was measured,the partial least squares regression(PLS)algorithm prediction model and the voltage solution model were established using the spectral data,and the prediction accuracy of the two models was compared.At the same time,considering the environmental interference factors in the water body,the impact of turbidity and temperature on the COD measurement results was analyzed,and the constructed model was compensated and corrected,which improved the detection accuracy of the system.The experimental results show that,compared with the traditional water quality COD detection method,the system achieves the purpose of fast,high-precision and real-time online detection.

关 键 词：紫外光谱 水质检测 实时在线 偏最小二乘回归 电压解算 

分 类 号：X853[环境科学与工程—环境工程]