本文選題：太赫茲　切入點(diǎn)：Etalon效應(yīng)　出處：《西南大學(xué)學(xué)報(bào)(自然科學(xué)版)》2017年02期

【摘要】：針對(duì)液體樣品在太赫茲光譜檢測(cè)中遇到的比色皿吸收及頻譜振蕩問題,以豆油檢測(cè)為例,在傳統(tǒng)計(jì)算模型基礎(chǔ)上,考慮石英比色皿對(duì)THz電磁波吸收,建立THz-TDS技術(shù)提取液體材料吸收系數(shù)和折射率的計(jì)算模型,并對(duì)得到的光譜數(shù)據(jù)利用小波變換進(jìn)行時(shí)-頻分析,找出頻譜、吸收譜振蕩的原因,采用主脈沖截取法,有效去除發(fā)射器、探測(cè)器以及石英比色皿等光學(xué)元件Etalon效應(yīng)引起的頻譜干涉,最后,結(jié)合實(shí)驗(yàn)得到的0.2~1.8THz波段豆油頻譜對(duì)采用的主脈沖截取法的優(yōu)缺點(diǎn)進(jìn)行分析,并深入探討1.0~1.8THz頻段樣品吸收譜、頻譜殘余振蕩存在的原因.該測(cè)量分析方法對(duì)THz光譜技術(shù)在食用油品質(zhì)檢測(cè)應(yīng)用方面進(jìn)行了有益探索.
[Abstract]:In order to solve the problem of plate absorption and spectrum oscillation of liquid samples in terahertz spectrum detection, taking soybean oil detection as an example, the absorption of THz electromagnetic waves by quartz colorimetric dishes was considered on the basis of traditional calculation model.The calculation model of absorption coefficient and refractive index of liquid material was established by THz-TDS technology. The time-frequency analysis of the obtained spectral data was carried out by wavelet transform to find out the reason of spectrum and absorption spectrum oscillation, and the main pulse interception method was used.The spectrum interference caused by Etalon effect caused by emitter, detector and quartz colorimeter is effectively removed. Finally, the advantages and disadvantages of the main pulse interception method are analyzed in combination with the 0.2~1.8THz band soybean oil spectrum obtained from the experiment.The reason of the absorption spectrum and the residual oscillation in the 1.0~1.8THz band are also discussed.The method is helpful to the application of THz spectroscopy in the quality detection of edible oil.
【作者單位】： 西南大學(xué)工程技術(shù)學(xué)院;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(61401373) 中央高校基本科研業(yè)務(wù)費(fèi)專項(xiàng)資金項(xiàng)目(2362014xk13) 重慶市應(yīng)用開發(fā)計(jì)劃項(xiàng)目(cstc2014yykfa80006)
【分類號(hào)】：O433.1

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