發(fā)布時間：2018-02-15 08:04

  本文關鍵詞： 激光誘導擊穿光譜 拉曼光譜 危險物檢測 炸藥 生化危險物　出處：《光譜學與光譜分析》2017年08期 　論文類型：期刊論文

【摘要】：炸藥、生物及化學危險物檢測在反恐和公共安全領域具有重要應用價值,也是目前亟需解決的問題。激光誘導擊穿光譜技術利用高能激光脈沖誘導材料產生等離子體,通過探測等離子體輻射光譜從而分析其組成成分。拉曼光譜技術是基于非彈性光散射的一種光譜檢測方法,可以反映分子的振動信息。由于它們都具有快速和非接觸遙測的優(yōu)點,成為最有發(fā)展?jié)摿蛻们熬暗奈ｋU物檢測技術。介紹了激光誘導擊穿光譜、拉曼光譜以及二者聯(lián)合探測技術在危險物檢測中的國內外發(fā)展現(xiàn)狀,并對各自的優(yōu)缺點進行了分析。激光誘導擊穿光譜信號強、實時性好,但重復性差、基底效應影響顯著,在判別組成元素相同而分子結構不同的危險物和干擾物時面臨巨大挑戰(zhàn)。拉曼光譜能夠提供被測物的分子信息,適合于鑒別有機危險物,但信號弱、受熒光干擾大、檢測低濃度樣品及分析混合物的能力弱,外場使用時受周圍雜散光以及環(huán)境變化的影響大。將這兩種光譜探測技術相融合,發(fā)揮各自的優(yōu)點,可以有效地提高探測危險物的準確度。但兩種光譜聯(lián)合探測系統(tǒng)結構和數(shù)據(jù)處理復雜,成本高,還有許多技術難點亟需解決。文章最后,對危險物激光誘導擊穿光譜和拉曼光譜研究的前景進行了展望。
[Abstract]:The detection of explosives, biological and chemical hazards has important application value in the field of anti-terrorism and public safety, and is also a problem that needs to be solved. Laser induced breakdown spectroscopy uses high-energy laser pulse-induced materials to produce plasma. Raman spectroscopy is a spectral detection method based on inelastic light scattering. They can reflect the vibration information of molecules. Because of their advantages of fast and non-contact telemetry, they are the most promising and promising detection techniques for hazardous substances. The laser induced breakdown spectra are introduced. The present situation of Raman spectroscopy and their combined detection technology in the detection of hazardous substances at home and abroad are analyzed. The advantages and disadvantages of the two techniques are analyzed. The laser induced breakdown spectrum signal is strong and real-time, but the repeatability is poor, and the effect of substrate effect is significant. The Raman spectrum can provide molecular information for the detection of organic hazardous substances, but the signal is weak, and it is greatly interfered by fluorescence. The ability to detect low concentration samples and analyze mixtures is weak, and the external field is greatly affected by ambient stray light and environmental changes. The two spectral detection techniques are combined to give play to their respective advantages. It can effectively improve the accuracy of detecting dangerous substances. However, the structure and data processing of the two kinds of spectral joint detection system are complex, high cost, and many technical difficulties need to be solved. The prospect of laser induced breakdown spectra and Raman spectra of hazardous substances is prospected.
【作者單位】： 北京理工大學光電學院;
【基金】：國家自然科學基金項目(60978035) 北京市自然科學基金項目(4132063)資助
【分類號】：O657.3;TQ086.52

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