| 基于离散点与小波重构SnO_2信号的新方法 |
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| 引用本文： | 张西咸,陈莲.基于离散点与小波重构SnO_2信号的新方法[J].传感器与微系统,2007,26(8):58-61,66. |
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| 作者姓名： | 张西咸 陈莲 |
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| 作者单位： | 1. 中国科学院,安徽光学精密机械研究所,安徽,合肥,230031;中国政法大学,北京,100088
2. 中国政法大学,北京,100088 |
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| 摘 要： | 提出了基于离散漂移点识别色谱基线校正的新方法,并结合小波变换去噪声技术,实现了色谱信号基线重构和噪声滤除。该方法不仅适合于色谱信号的离线处理,也适合于在线实时处理。并在以SnO2半导体金属氧化物气体传感器为检测器的便携式气相色谱仪上得到了应用,实现了总挥发性有机化合物(TVOC)检测分析中谱图的基线实时校正和噪声抑制,获得了满意的结果。
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| 关 键 词： | 信号处理 小波变换 SnO2气体传感器 色谱 滤噪 基线漂移 |
| 文章编号： | 1000-9787（2007）08-0058-04 |
| 修稿时间： | 2007-01-11 |
New method for reconstruction of SnO2 signals based on detect of discrete points and wavelet transform |
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| ZHANG Xi-xian,CHEN Lian.New method for reconstruction of SnO2 signals based on detect of discrete points and wavelet transform[J].Transducer and Microsystem Technology,2007,26(8):58-61,66. |
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| Authors: | ZHANG Xi-xian CHEN Lian |
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| Affiliation: | 1. Anhni Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China; 2. The China University of Political Science and Law, Beijing 100088, China |
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| Abstract: | A new method for reconstruction of chromatography signals with drift of base line and noise contaminated is presented. The baseline correction method is developed based on discrete drift points detection, and the noise on base line is depressed by using wavelet transformation method to great degree. This method is suitable for both online and offline processing of chromatography signals, It is used in portable GC with SnO2 sensor as detector. The baseline correction and noise restraint of chromatogram in TVOC analysis are realized. The satisfaction results are achieved. |
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| Keywords: | signal rocessing wavelet transformation(WT) SnO2 gas sensor chromatography noise reduction baseline correction |
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