西林瓶内氧气含量在线检测的基线快速校正方法
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摘要
构建了一个开放单光路短光程激光检测平台,提出了一种基于线型的Levenberg-Marquardt(L-M)算法,以洛伦兹线型和高斯线型的二阶导数作为L-M算法的拟合函数,对氧气体积分数为0%～21%的样本进行校正。结果表明:在基于洛伦兹线型的L-M算法校正中,氧气含量-二次谐波峰值的拟合系数最高,为0.9995;以洛伦兹线型为优化依据,对含氧气体积分数为1%的样品进行了多次测量,校正处理前后预测的氧气体积分数最大偏差分别为0.38%和0.22%,预测的均方根误差分别为0.25%和0.16%。
A laser detection platform with an open single path and short optical distance is constructed, and a Levenberg-Marquardt(L-M) algorithm based on linetype is proposed. The method uses second order derivative of Gaussian linetype and Lorenz linetype as the fitting function of L-M algorithm. The samples with oxygen volume fraction of 0%-21% are corrected. The results show that the correlation coefficients of oxygen content and peak is the highest in L-M algorithm correction based on Lorentz linetype(0.9995). The sample with oxygen volume fraction of 1% is measured several times on the basis of Lorentz linetype. Compared with the measured results before and after the correction, the predicted maximum deviations of oxygen volume fraction are 0.38% and 0.22%, respectively, and the root mean square errors of prediction are 0.25% and 0.16%, respectively.
A laser detection platform with an open single path and short optical distance is constructed, and a Levenberg-Marquardt(L-M) algorithm based on linetype is proposed. The method uses second order derivative of Gaussian linetype and Lorenz linetype as the fitting function of L-M algorithm. The samples with oxygen volume fraction of 0%-21% are corrected. The results show that the correlation coefficients of oxygen content and peak is the highest in L-M algorithm correction based on Lorentz linetype(0.9995). The sample with oxygen volume fraction of 1% is measured several times on the basis of Lorentz linetype. Compared with the measured results before and after the correction, the predicted maximum deviations of oxygen volume fraction are 0.38% and 0.22%, respectively, and the root mean square errors of prediction are 0.25% and 0.16%, respectively.
引文
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[15] Fu W H, Hei Y Q, Li X H. UBSS and blind parameters estimation algorithms for synchronous orthogonal FH signals[J]. Journal of Systems Engineering and Electronics, 2014, 25(6): 911-920.
[16] Liu X, Han L J, Yang Z L, et al. Application of orthogonal signal correction for near infrared spectroscopic calibration transfer of crude protein of straw silage[J]. Chinese Journal of Analytical Chemistry, 2012, 40(4): 596-601. 刘贤, 韩鲁佳, 杨增玲, 等. 基于正交信号校正的秸秆青贮饲料粗蛋白近红外分析模型传递方法[J]. 分析化学, 2012, 40(4): 596-601.
[2] Neethu S, Verma R, Kamble S S, et al. Validation of wavelength modulation spectroscopy techniques for oxygen concentration measurement[J]. Sensors and Actuators B: Chemical, 2014, 192: 70-76.
[3] Nie W, Kan R F, Yang C G, et al. Research progress on the application of tunable diode laser absorption spectroscopy[J]. Chinese Journal of Lasers, 2018, 45(9): 0911001. 聂伟, 阚瑞峰, 杨晨光, 等. 可调谐二极管激光吸收光谱技术的应用研究进展[J]. 中国激光, 2018, 45(9): 0911001.
[4] Wang M M, Dai W G, Yang H N, et al. Leakage detection of vials based on tunable diode laser absorption spectroscopy[J]. Laser & Optoelectronics Progress, 2017, 54(8): 083004. 王明明, 戴伟国, 杨荟楠, 等. 基于可调谐半导体激光吸收光谱技术的西林瓶检漏方法[J]. 激光与光电子学进展, 2017, 54(8): 083004.
[5] Goldenstein C S, Almodóvar C A, Jeffries J B, et al. High-bandwidth scanned-wavelength-modulation spectro- scopy sensors for temperature and H2O in a rotating detonation engine[J]. Measurement Science and Technology, 2014, 25(10): 105104.
[6] Zhu G F, Zhu H Q, Yang C H, et al. Parameter optimization of a short open optical path′s oxygen concentration detection system based on WMS[J]. Chinese Journal of Electronics, 2017, 26(4): 720-724.
[7] Zhu G F, Hu X, Zhu H Q, et al. The multi-beam interference suppression for measuring penicillin vial′s oxygen concentration based on tunable diode laser absorption spectroscopy[J]. Spectroscopy and Spectral Analysis, 2018, 38(2): 372-376. 朱高峰, 胡鑫, 朱红求, 等. 基于TDLAS检测西林瓶内氧气浓度的多光束干涉抑制方法[J]. 光谱学与光谱分析, 2018, 38(2): 372-376.
[8] Zhu G F, Zhu H Q, Yang C H, et al. Improved Savitzky-Golay filtering algorithm for measuring a pharmaceutical vial′s oxygen content based on wavelength modulation spectroscopy[J]. Journal of Optical Technology, 2017, 84(5): 355-359.
[9] Zhang R, Zhao X H, Hu Y J, et al. Background elimination method based on harmonic detection in no absorption spectral region[J]. Acta Optica Sinica, 2013, 33(4): 0430006. 张锐, 赵学玒, 胡雅君, 等. 基于无吸收谱线区域检测谐波的背景消除方法[J]. 光学学报, 2013, 33(4): 0430006.
[10] Werle P W, Mazzinghi P, D′Amato F, et al. Signal processing and calibration procedures for in situ diode-laser absorption spectroscopy[J]. Spectro-chimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2004, 60(8/9): 1685-1705.
[11] Persson L, Andersson F, Andersson M, et al. Approach to optical interference fringes reduction in diode laser absorption spectroscopy[J]. Applied Physics B, 2007, 87(3): 523-530.
[12] Masiyano D, Hodgkinson J, Tatam R P. Gas cells for tunable diode laser absorption spectroscopy employing optical diffusers. Part 2: integrating spheres[J]. Applied Physics B, 2010, 100(2): 303-312.
[13] Guo Y, Zhao X H, Zhang R, et al. The noise filtering and baseline correction for harmonic spectrum based on wavelet transform[J]. Spectroscopy and Spectral Analysis, 2013, 33(8): 2172-2176. 郭媛, 赵学玒, 张锐, 等. 小波变换应用于谐波谱线的噪声滤除与基线校正[J]. 光谱学与光谱分析, 2013, 33(8): 2172-2176.
[14] Hu Y G, Zhao Z Y, Wang G. Baseline correction and background elimination using wavelet transforms[J]. Journal of Huazhong University of Science and Technology (Natural Science Edition), 2011, 39(6): 36-40. 胡耀垓, 赵正予, 王刚. 基于小波的光谱信号基线校正和背景扣除[J]. 华中科技大学学报 (自然科学版), 2011, 39(6): 36-40.
[15] Fu W H, Hei Y Q, Li X H. UBSS and blind parameters estimation algorithms for synchronous orthogonal FH signals[J]. Journal of Systems Engineering and Electronics, 2014, 25(6): 911-920.
[16] Liu X, Han L J, Yang Z L, et al. Application of orthogonal signal correction for near infrared spectroscopic calibration transfer of crude protein of straw silage[J]. Chinese Journal of Analytical Chemistry, 2012, 40(4): 596-601. 刘贤, 韩鲁佳, 杨增玲, 等. 基于正交信号校正的秸秆青贮饲料粗蛋白近红外分析模型传递方法[J]. 分析化学, 2012, 40(4): 596-601.
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