本文關(guān)鍵詞： 紅外 定量檢測(cè) 二階導(dǎo)數(shù)譜 Savitzky-Golay濾波器 特征吸收窗　出處：《光譜學(xué)與光譜分析》2017年06期 　論文類(lèi)型：期刊論文

【摘要】：紅外光譜分析技術(shù)已被液體、固體和氣體混合物各組分的定量檢測(cè)廣泛應(yīng)用。針對(duì)紅外光譜定量檢測(cè)過(guò)程中存在的計(jì)算過(guò)程復(fù)雜、受背景及噪聲干擾、多組分譜線混疊的問(wèn)題,一方面,通過(guò)獲取譜線二階導(dǎo)數(shù)去除背景及噪聲干擾,并一定程度上區(qū)分混疊譜峰。在獲取二階導(dǎo)數(shù)譜線過(guò)程中運(yùn)用Savitzky-Golay濾波器進(jìn)行平滑濾波處理,并根據(jù)譜線頻率特征選取Savitzky-Golay濾波器最佳濾波參數(shù),解決了濾波參數(shù)缺乏標(biāo)準(zhǔn)化選取方法的問(wèn)題。另一方面,根據(jù)被測(cè)組分的吸收分布情況生成特征吸收窗分別對(duì)待測(cè)原始吸收譜線以及二階導(dǎo)數(shù)譜線加以處理,提取出在濃度計(jì)算過(guò)程中占據(jù)重要性更大的特征吸收的區(qū)域,從而排除非吸收區(qū)域中背景、噪聲及其他組分對(duì)計(jì)算結(jié)果的干擾。以一組丙烷、丙烯和甲苯混合氣體為例,運(yùn)用二階導(dǎo)數(shù)方法以及特征吸收窗方法進(jìn)行定量檢測(cè),并與直接利用原始譜線的檢測(cè)結(jié)果進(jìn)行比較分析。實(shí)驗(yàn)結(jié)果表明采用二階導(dǎo)數(shù)譜與特征吸收窗的定量檢測(cè)方法精度更高,相對(duì)誤差基本在5%以?xún)?nèi)。
[Abstract]:Infrared spectrum analysis technology has been widely used in quantitative detection of components of liquid, solid and gas mixtures. In view of the complex calculation process in the process of infrared spectrum quantitative detection, it is interfered by background and noise. On the one hand, the second derivative of spectral lines is obtained to remove background and noise interference. To some extent, the aliasing spectrum peak is distinguished. In the process of obtaining the second derivative spectral line, Savitzky-Golay filter is used to smooth filter. The optimal filter parameters of Savitzky-Golay filter are selected according to the spectral line frequency characteristics, which solves the problem of the lack of standardized selection method of filter parameters. On the other hand. According to the absorption distribution of the tested components, the characteristic absorption window is generated to treat the original absorption line and the second derivative spectrum line respectively. In order to eliminate the interference of background, noise and other components in the non-absorption region, a group of propane was extracted to occupy the more important characteristic absorption region in the calculation of concentration. The second derivative method and the characteristic absorption window method were used for quantitative detection of propylene and toluene mixtures. The experimental results show that the quantitative detection method based on the second derivative spectrum and the characteristic absorption window is more accurate and the relative error is less than 5%.
【作者單位】： 河北工業(yè)大學(xué)機(jī)械工程學(xué)院;天津大學(xué)精密測(cè)試技術(shù)及儀器國(guó)家重點(diǎn)實(shí)驗(yàn)室;天津工業(yè)大學(xué)天津市電工電能新技術(shù)重點(diǎn)實(shí)驗(yàn)室;
【基金】：河北省自然科學(xué)基金項(xiàng)目(F2014202065) 國(guó)家重大科學(xué)儀器設(shè)備開(kāi)發(fā)專(zhuān)項(xiàng)(2012YQ06016501) 國(guó)家自然科學(xué)基金項(xiàng)目(61505142)資助
【分類(lèi)號(hào)】：O657.33

【相似文獻(xiàn)】

相關(guān)期刊論文 前2條

1 李紅玫,辛紅;二階導(dǎo)數(shù)光譜—峰面積法測(cè)定鎳[J];長(zhǎng)春師范學(xué)院學(xué)報(bào);2002年05期

2 ;[J];;年期

，

本文編號(hào)：1492520