摘要
针对电气设备内六氟化硫(SF_(6))分解物中二氧化硫(SO_(2))浓度检测问题,对紫外吸收光谱分析模块设计和数据处理方法进行了研究。采用低功耗脉冲氙灯光源缩短预热时间,设计了多次反射的长光程气体吸收池,有效缩短响应时间;光源和微型光谱仪与气室直接耦合,减少用气量,稳定性更好。在280 nm~320 nm谱段进行SO_(2)浓度反演,采用偏最小二乘回归多元校正方法对SO_(2)谱段差分吸光度与SO_(2)浓度建立回归模型,模型误差小于0.5μL/L。设计了检测仪原理样机,试验验证了设计方案的可行性。
Aiming at the detection of SO_(2) concentration in SF_(6) decomposition products in electrical equipment,the design of ultraviolet absorption spectrum analysis module and data processing method were studied.Low power consumption pulsed xenon lamp light source was used to shorten preheating time.A long optical path gas absorption cell with multiple reflections was designed to effectively shorten the response time.The gas consumption was reduced,and the light source and micro spectrometer were directly coupled with the gas chamber,so that the stability was better.The SO_(2) concentration was inversed in the 280 nm~320 nm spectral band.The partial least squares regression multiple correction method was used to establish a regression model for the differential absorbance of SO_(2) spectral band and the SO_(2) concentration,and the errors of the model was less than 0.5 μL/L.The principle prototype was designed,and the feasibility of the design scheme was verified by experiments.
作者
刘伟
毛逸凡
霍思佳
杨帅
LIU Wei;MAO Yifan;HUO Sijia;YANG Shuai(School of Automation and Information Engineering,Xi'an University of Technology,Xi'an 710048,China;Xi'an Power Supply Company,State Grid Shaanxi Electric Power Co.,Ltd.,Xi'an 710032,China)
出处
《应用光学》
北大核心
2025年第3期589-595,共7页
Journal of Applied Optics
基金
国家自然科学基金(62273274)
国家电网公司科技项目(5226XA220002)。
关键词
紫外吸收光谱法
气体分析模块
二氧化硫浓度
偏最小二乘回归
ultraviolet absorption spectrometry
gas analysis module
SO_(2) concentration
partial least squares regression
