中国计量大学学报2024，Vol.35Issue(1)：35-42,8.DOI:10.3969/j.issn.2096-2835.2024.01.006
基于改进VMD算法的TDLAS甲烷检测信号降噪研究
Research on TDLAS methane detection signal denoising based on improved VMD algorithms
摘要
Abstract
Aims:A Northern Goshawk Optimization(NGO)improved Variational Mode Decomposition(VMD)denoising algorithm was proposed to suppress noise in methane detection systems based on Tunable Semiconductor Laser Absorption Spectroscopy(TDLAS).Methods:Firstly,the second harmonic signal was simulated using MATLAB.Then,the VMD algorithm and the NGO VMD algorithm were used to denoise the second harmonic signal;and the performance of the two methods was compared using the signal-to-noise ratio(SNR),the root mean square error(RMSE),and the correlation coefficient(PCC).Results:The signal-to-noise ratio of the reconstructed signal using the NGO VMD algorithm increased by about 2 times compared to the original signal,with a 97％reduction in the root mean square error and a high correlation coefficient of 0.997.Conclusions:The proposed NGO VMD algorithm has significant advantages over traditional VMD algorithms in various indicators,thus improving the signal-to-noise ratio of the TDLAS methane detection system.Methods:A northern goshawk optimization(NGO)improved VMD denoising algorithm was proposed.First,the second harmonic signal was simulated based on MATLAB.Then the second harmonic signal was denoised using the VMD algorithm and the NGO-VMD algorithm respectively;and the performance of the two methods was compared with the signal-to-noise ratio(SNR),the root-mean-square deviation(RMSE)and correlation coefficient(PCC).Results:The signal-to-noise ratio of the reconstructed signal using the NGO-VMD algorithm was approximately twice that of the original signal.The Root-mean-square deviation was reduced by 97％;and the correlation coefficient was as high as 0.997.Conclusions:The proposed NGO-VMD algorithm has significant advantages over the traditional VMD algorithms in various indicators and improves the signal-to-noise ratio of TDLAS methane detection systems.关键词
可调谐半导体激光吸收光谱/北方苍鹰优化/变分模态分解/降噪Key words
tunable diode laser absorption spectroscopy/northern goshawk optimization/variational mode decomposition/noise reduction分类
信息技术与安全科学引用本文复制引用
唐奇超,王强,洪志明,谷小红,肖瑶..基于改进VMD算法的TDLAS甲烷检测信号降噪研究[J].中国计量大学学报,2024,35(1):35-42,8.基金项目
浙江省尖兵领雁研发攻关计划项目(No.2022C03179),浙江省万人计划科技创新领军人才项目(No.2019R52017) （No.2022C03179）
