温度和光照对动车组用矿物型变压器油荧光特性的影响  

Effect of Temperature and Light on Fluorescence Characteristics of Mineral Transformer Oil for EMU

作　　者：赵恩波 史泽林[1,2] 刘云鹏[1,2] 李晨曦[1,2] ZHAO En-bo;SHI Ze-lin;LIU Yun-peng;LI Chen-xi(Key Laboratory of Opto-Electronic Information Processing,Chinese Academy of Sciences,Shenyang 110016,China;Shenyang Institute of Automation,Chinese Academy of Sciences,Shenyang 110016,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院光电信息处理重点实验室,辽宁沈阳110016 [2]中国科学院沈阳自动化研究所,辽宁沈阳110016 [3]中国科学院大学,北京100049

出　　处：《光谱学与光谱分析》2024年第8期2233-2239,共7页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(U1713216)资助。

摘　　要：牵引变压器渗漏油检测是动车组运行故障检测的重要部分。动车组运行故障图像检测系统采集的近红外底板图像中渗漏变压器油痕迹与水迹的特征相似,致使列检员与图像识别算法均无法有效识别渗漏油痕迹,进而导致渗漏油故障的误报率高,影响列车的正常运行和检修效率。由于水不具有荧光特性,而矿物型变压器油具有紫外荧光特性,故可通过荧光成像将两者区分。另外,由于动车组运行季节、地域、时间段不同,致使渗漏的变压器油处于不同的环境条件中,进而影响渗漏油的荧光特性。而渗漏油的荧光特性决定荧光成像系统激发光源波长和成像波段的选取。因此,为了明确动车组用矿物型变压器油的荧光特性,以及两个主要环境因素温度、光照对荧光特性的影响,首先制备了不同温度、不同光照条件下的变压器油样本;而后,利用荧光光谱仪采集样本的三维荧光光谱,进而分析样本的荧光特性、温度和光照对荧光特征峰位置和强度的影响。结果表明,动车组用矿物型变压器油具有两个较强的荧光激发/发射峰,分别位于350/382 nm和350/402 nm;温度的升高引起荧光强度下降,但未改变荧光波峰位置;光照强度的增加与光照时间的延长都引起荧光强度下降,但未显著改变荧光波峰的位置;在动车组运行监测时间间隔内,温度和光照未显著改变油品的荧光特性。实验结果为荧光成像检测动车组用矿物型变压器油的渗漏故障提供了实验依据和数据支持。The oil leakage fault detection of traction transformers isa crucial component of Electrical Multiple Unit(EMU)operation fault detection.In the near-infrared image of the bottom plate collected by the trouble of moving the EMU detection system,the characteristics of leakage transformer oil traces are similar to those of water traces,which cannot be distinguished by the trouble inspectors and image recognition algorithms,resulting in a high false alarm rate of the oil leakage fault and affecting the operation and maintenance efficiency of the train.Water lacks fluorescence properties,whereas mineral transformer oil exhibits ultraviolet fluorescence,so fluorescence imaging can differentiate the two traces.Moreover,varying operating seasons,regions,and periodsof EMU expose the leaked transformer oil to diverse environmental conditions,affecting its fluorescence properties.The fluorescence properties of the leaked oil decide the choice of excitation light source wavelength and imaging band for the fluorescence imaging system.Hence,samples under different temperatures and light conditions are first prepared to explore the fluorescence properties of mineral transformer oil used by EMU and the impact of two major environmental factors,temperature,and light,on its fluorescence properties.Then,the three-dimensional fluorescence spectra of the samples were collected by the fluorescence spectrometer and subsequently analyzed,the fluorescence characteristics of the samples and the effect of temperature and illumination on the location and intensity of fluorescence characteristic peaks.The results show that the mineral transformer oil for EMU has two strong fluorescence excitation/emission peaks located at 350/382 and 350/402 nm,respectively.The increase in temperature causes a decrease in fluorescence intensity but does not change the position of the fluorescence peaks.The increase of light intensity and the extension of light duration cause a decrease in fluorescence intensity but do not significantly change the position of

关 键 词：变压器油 渗漏油检测 温度 光照 荧光特性 动车组 

分 类 号：O657.32[理学—分析化学]