化学离子迁移谱检测仪信号降噪方法研究  

Research on signal denoising methods in chemical ion mobility spectrometers

作　　者：蒋颜玮[1] 杨杰[1] 曹树亚[1] 郭成海[1] 赵将[1] 邵晟宇[1] 

机构地区：[1]防化研究院,北京102205

出　　处：《计算机与应用化学》2013年第1期31-35,共5页Computers and Applied Chemistry

基　　金：国家自然科学基金资助项目(11274340)

摘　　要：化学离子迁移谱检测仪是对化学毒剂、有毒有害气体等化学物质进行痕量检测和分析的一种有效的快速现场检测仪器。介绍了其组成结构和工作原理及其信号的产生,针对该检测仪中的信号经常存在的噪声污染问题,分析了IMS信号的特性,介绍了几种降噪方法的基本原理及其在信号降噪中的应用,通过计算机仿真对实际采集的IMS信号进行了降噪处理。仿真结果表明,这些降噪方法都能在一定程度上对IMS信号进行了降噪,相对来说,小波分析方法是一种更为有效的降噪方法,这为实现对IMS信号的快速有效识别奠定了基础。The chemical ion mobility spectrometer is an effective fast-detecting local instrument, which performs trace detecting and analyzing for chemical agents, toxic chemical gases, etc. In this paper, the structure and working principle of IMS are described. For the usual existing noise in IMS signals, the characteristic of IMS signals is analyzed, the basic theory and applications in signal denoising of some methods are presented, and the factual IMS signals acquired is processed using these methods by computer simulation. The results show that these methods can denoise the IMS signal to a certain extent. Relatively, the wavelet analyzing method is the more effective for IMS signal denoising, which establishes a basis for realizing an effective recognition of cliemieal IMS signals.

关 键 词：离子迁移谱(IMS) 信号降噪 数据平滑 傅里叶变换 小波分析 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术] O6-39[自动化与计算机技术—计算机科学与技术]