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A Virtual Instrument of Methane Concentration Harmonic Detection Based on Wavelet Analysis
Author(s): 
Pages: 1-3,6
Year: Issue:  7
Journal: Measurement & Control Technology

Keyword:  methane concentrationwavelet analysisLabVIEWharmonic detectionvirtual instrument;
Abstract: 基于甲烷气体的谐波检测技术,在LabVIEW虚拟仪器设计平台上采用小波分析技术对光谱信号进行去噪,并采用快速傅里叶变换对去噪后的信号进行频谱分析,获得甲烷气体吸收光谱一、二次谐波的幅值,实现甲烷气体浓度检测.实验结果表明,利用该方法可以很好地去除噪声,精确地提取出谐波信号,获得较好的信噪比.
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