一种基于温度参量的西林瓶内氧气浓度检测方法

doi:10.11949/j.issn.0438-1157.20170737

化工学报 ›› 2017, Vol. 68 ›› Issue (12): 4658-4664.DOI: 10.11949/j.issn.0438-1157.20170737

一种基于温度参量的西林瓶内氧气浓度检测方法

朱高峰^1,2, 阳春华¹, 朱红求¹, 桂卫华¹, 朱剑平³

1 中南大学信息科学与工程学院, 湖南长沙 410083;
2 湖南人文科技学院信息学院, 湖南娄底 417000;
3 楚天科技股份有限公司研发中心, 湖南长沙 410600

收稿日期:2017-06-07 修回日期:2017-07-11 出版日期:2017-12-05 发布日期:2017-12-05
通讯作者: 朱红求
基金资助:
国家自然科学基金创新研究群体科学基金项目（61621062）；国家自然科学基金重点项目（61533021）；湖南省教育厅重点项目（17A109）。

A method to determine oxygen concentration in penicillin vials using temperature parameter

ZHU Gaofeng^1,2, YANG Chunhua¹, ZHU Hongqiu¹, GUI Weihua¹, ZHU Jianping³

1 School of Information Science and Engineering, Central South University, Changsha 410083, Hunan, China;
2 School of Information, Hunan University of Humanities, Science and Technology, Loudi 417000, Hunan, China;
3 Research Center, Truking Technology Limited, Changsha 410600, Hunan, China

Received:2017-06-07 Revised:2017-07-11 Online:2017-12-05 Published:2017-12-05
Supported by:
supported by the Foundation for Innovative Research Groups of the National Natural Science Foundation of China (61621062), the Key Program of the National Natural Science of China (61533021) and the Scientific Research Fund of Hunan Provincial Education Department (17A109).

摘要/Abstract

摘要：

目前西林瓶内氧气浓度多采用离线抽样破坏性检测，存在耗时长、精度低、漏检率高等不足。应用可调谐半导体激光吸收光谱（TDLAS）理论，构建氧气浓度与温度、二次谐波强度之间的理论关系模型，提出一种利用温度参量在线检测瓶内氧气浓度的方法。详细阐述了实验设计方法和步骤，优化了最佳入射角和系统主要参数，在气体压强为1atm（101.325 kPa）和温度为296 K的条件下，采集不同氧气浓度的西林瓶作为初始建模样本，建立常规的氧气浓度反演模型。同时样本浓度为21%的西林瓶所对应的二次谐波幅度，作为基于温度参量来定量预测的参考幅度。实验结果表明，利用温度参量检测瓶内氧气浓度能有效克服温度大幅变化对浓度反演的直接影响，预测的均方根误差（RMSEP）相对直接浓度反演预测降低了80.33%。

关键词: 可调谐半导体激光吸收光谱, 气体, 温度补偿, 二次谐波, 测量, 实验验证

Abstract:

Oxygen concentration in penicillin vials is currently detected by destructive measurement of off-line samples, which has many limitations including long lead time, low precision, and high missing detection rate. Using tunable diode laser absorption spectroscopy (TDLAS), a theoretical correlation model between oxygen concentration, temperature, and second harmonic signal strength was constructed, and an on-line detection method to determine vial's oxygen concentration was proposed by temperature parameter. The experimental design and procedure were described in detail, angle of incidence and main parameters of the system were optimized. Under condition of 1 atm (101.325 kPa) air pressure and 296 K temperature, a conventional oxygen concentration inversion model was established on vials of different oxygen concentrations. At the same time, the second harmonic signal amplitude of 21% oxygen concentration sample was used as reference for quantitative prediction by temperature parameters. Experimental results show that temperature parameter for detecting vial's oxygen concentration can effectively overcome direct influence of large temperature variation on concentration inversion. The root mean square error of prediction (RMSEP) was reduced by 80.33%, compared to prediction method of relative direct concentration inversion.

Key words: TDLAS, gas, temperature compensation, second harmonic signal, measurement, experimental validation

中图分类号:

O439

朱高峰, 阳春华, 朱红求, 桂卫华, 朱剑平. 一种基于温度参量的西林瓶内氧气浓度检测方法[J]. 化工学报, 2017, 68(12): 4658-4664.

ZHU Gaofeng, YANG Chunhua, ZHU Hongqiu, GUI Weihua, ZHU Jianping. A method to determine oxygen concentration in penicillin vials using temperature parameter[J]. CIESC Journal, 2017, 68(12): 4658-4664.

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一种基于温度参量的西林瓶内氧气浓度检测方法

A method to determine oxygen concentration in penicillin vials using temperature parameter

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