面向油品参数快速计量的高精度傅里叶近红外光谱仪  

High Precision Near Infrared Fourier Spectrometer for Rapid Measurement of Oil Parameters

作　　者：方旭 刘欣 李琪[2] 舒慧[2] 张正东[2] 程真英[1] 李瑞君[1] FANG Xu;LIU Xin;LI Qi;SHU Hui;ZHANG Zhengdong;CHENG Zhenying;LI Ruijun(Anhui Province Key Laboratory of Measuring Theory and Precision Instrument,School of Instrument Science and Optoelectronics Engineering,Hefei University of Technology,Hefei,Anhui 230009,China;National Institute of Metrology,Beijing 100029,China)

机构地区：[1]合肥工业大学仪器科学与光电工程学院测量理论与精密仪器安徽省重点实验室,安徽合肥230009 [2]中国计量科学研究院,北京100029

出　　处：《计量学报》2024年第1期103-111,共9页Acta Metrologica Sinica

基　　金：国家市场监督管理总局科技计划(2021MK153);中国计量科学研究院基本科研业务费(AKYZZ2131,AKYZZ2234);中国计量科学研究院横向科研项目(JSFW2102,KYH2206)。

摘　　要：针对油品现场检测中实时性和准确度的需要,研制了一种面向油品参数快速计量的高精度傅里叶近红外光谱仪。该光谱仪采用相干长度扩增方法,可快速定位有效信号;通过驱动采集控制系统对傅里叶近红外检测光路进行100 nm等间隔的干涉调制,最终由傅里叶逆变换解析出的吸收光谱分辨力可达3.25 cm^(-1)。用该光谱仪对汽油样品进行质量检测的结果表明:该光谱仪可在短时间内对汽油中5种物质含量进行快速计量,其最大体积误差不超过0.7%,可以满足油品参数现场计量的需求,对市场中成品油质量的监管具有重要意义。A high precision near infrared Fourier(NIR)spectrometer for rapid measurement of oil parameters was developed to address the need for real time and accuracy in field testing of oil products.To quickly locate the effective signal,the coherent length amplification method was employed by the spectrometer;the Fourier NIR detection optical path was modulated by driving the acquisition control system to interfere at 100 nm equal intervals;the final absorption spectrum resolution up to 3.25 cm^(-1) was resolved by the Fourier inversion.The spectrometer was used to test the quality of gasoline samples,and the results showed that the spectrometer can quickly measure the content of five substances in gasoline in a short time,and its maximum volume error does not exceed 0.7%,which can meet the needs of on-site measurement of oil parameters and is of great significance for the supervision of the quality of refined oil products in the market.

关 键 词：油品参数测量 近红外光谱仪 傅里叶逆变换 汽油 相干长度扩增法 

分 类 号：TB99[一般工业技术—计量学]