TDLAS分析仪谱图微缓形变的复原算法
发布时间：2019-03-26 09:50
【摘要】：为了减小谱图的微缓形变对TDLAS气体分析仪精度的影响,提出一种传递复原方案.该方案通过比对校验气体的出厂校准谱图和现场测量谱图,得到其形变系数;由于校验气体与过程气体间拥有相同的形变机制,根据形变的传递性可将过程气体的实时谱图也复原到校准状态,从而维持分析仪的保真度.解决了动态过程气体谱图形变的复原问题,不需调节光学和电子系统硬件参数,通过信号滤波、特征提取、形变系数计算,使用拉格朗日插值公式或Sinc函数插值法复原.在仿真实验中,传递复原的谱图与校准谱图的相似度达到99.999%.实验采集不同程度形变的CO_2气体谱图,采用拉格朗日插值复原算法的复原谱图与校准谱图的相似度达到99.9%.
[Abstract]:In order to reduce the influence of the micro-slow deformation of the spectrogram on the accuracy of the TDLAS gas analyzer, a transfer recovery scheme is proposed. According to the scheme, the deformation coefficient of the process gas is obtained by comparing the factory calibration spectrum and the on-site measurement spectrum of the calibration gas, and the real-time spectrogram of the process gas can be restored to the calibration state according to the transmission property of the deformation due to the same deformation mechanism between the calibration gas and the process gas, So as to maintain the fidelity of the analyzer. The method solves the problem of restoration of the dynamic process gas spectrum pattern, does not need to adjust the hardware parameters of the optical and electronic systems, and can be recovered by using the Lagrange interpolation formula or the Sinc function interpolation method without adjusting the hardware parameters of the optical and electronic systems. In the simulation experiment, the similarity of the restored spectrum and the calibration spectrum is 99.999%. The similarity of the recovery spectrum of the Lagrange interpolation recovery algorithm and the calibration spectrum is 99.9%.
【作者单位】： 中国石油大学(华东)信息与控制工程学院;华东师范大学精密光谱科学与技术国家重点实验室;
【基金】：国家自然科学基金委国际(地区)合作与交流项目(No.61105005) 华东师范大学精密光谱科学与技术国家重点实验室开放课题项目(No.F1505037A) 中国石油大学(华东)自主创新项目(Nos.27R1505012A,27R1505024A);中国石油大学(华东)研究生创新工程项目(No.YCXJ2016076)资助~~
【分类号】：O433.51
本文编号：2447428
[Abstract]:In order to reduce the influence of the micro-slow deformation of the spectrogram on the accuracy of the TDLAS gas analyzer, a transfer recovery scheme is proposed. According to the scheme, the deformation coefficient of the process gas is obtained by comparing the factory calibration spectrum and the on-site measurement spectrum of the calibration gas, and the real-time spectrogram of the process gas can be restored to the calibration state according to the transmission property of the deformation due to the same deformation mechanism between the calibration gas and the process gas, So as to maintain the fidelity of the analyzer. The method solves the problem of restoration of the dynamic process gas spectrum pattern, does not need to adjust the hardware parameters of the optical and electronic systems, and can be recovered by using the Lagrange interpolation formula or the Sinc function interpolation method without adjusting the hardware parameters of the optical and electronic systems. In the simulation experiment, the similarity of the restored spectrum and the calibration spectrum is 99.999%. The similarity of the recovery spectrum of the Lagrange interpolation recovery algorithm and the calibration spectrum is 99.9%.
【作者单位】： 中国石油大学(华东)信息与控制工程学院;华东师范大学精密光谱科学与技术国家重点实验室;
【基金】：国家自然科学基金委国际(地区)合作与交流项目(No.61105005) 华东师范大学精密光谱科学与技术国家重点实验室开放课题项目(No.F1505037A) 中国石油大学(华东)自主创新项目(Nos.27R1505012A,27R1505024A);中国石油大学(华东)研究生创新工程项目(No.YCXJ2016076)资助~~
【分类号】：O433.51
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