随机共振与仪器分析中弱信号的检测 |
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引用本文: | 吴晓静,郭卫民,蔡文生,潘忠孝. 随机共振与仪器分析中弱信号的检测[J]. 分析测试学报, 2003, 22(1): 18-20 |
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作者姓名: | 吴晓静 郭卫民 蔡文生 潘忠孝 |
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作者单位: | 中国科学技术大学化学系,安徽合肥,230026;中国科学技术大学化学系,安徽合肥,230026;中国科学技术大学化学系,安徽合肥,230026;中国科学技术大学化学系,安徽合肥,230026 |
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基金项目: | 国家自然科学基金资助项目 (20075024) |
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摘 要: | 样品分析过程中,往往得到背景噪声很强的信号,尤其在微量和痕量水平;当信号的信噪比很小时,通常的方法不能满足检测要求,该文基于随机共振理论提出了一种新的弱信号的检测方法并对相关参数进行了讲座主;方法是通过噪声的协调作用,获得系统的“共振”,从而实现弱信号的检测,应用于模拟和实验信号的处理结果证明了方法的可行性。
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关 键 词: | 随机共振 信噪比 非线性体系 弱信号 检测 |
文章编号: | 1004-4957(2003)01-0018-03 |
修稿时间: | 2002-03-30 |
Stochastic Resonance and Detection of Weak Signal in Instrumental Analysis |
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Abstract: | A method, based on the theory of stochastic resonance, is presented for the detection of a weak signal in instrumental analysis. The interaction of input signal and noise in a nonlinear system will lead to the enhancement of the signal _ to _ noise(S/N) ratio. A maximum S/N can be attained by modulating an external noise, and thus the detection of weak signal achieved. The method was applied for detecting simulated signals and experimental chromatographic signals of weak intensity with satisfactory results. The method proved to be feasible. |
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Keywords: | Stochastic resonance Signal _ to _ noise ratio Nonlinear system Weak signal Detection |
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