Study on denoising of continuous spectrum on-line monitoring signal of water quality with micro-reagents based on HHT

查看全文 作　　者：LI [1]Wen;LÜ [1]Binbin;FU [1]Hao;CAI [1]Yongqing

机构地区：[1]Institute of Mechanical and Electrical Engineering,North China University of Technology,Beijing 100144,China

出　　处：《Optoelectronics Letters》索引2022年第18卷第2期,共7页

基　　金：supported by the National Natural Science Foundation of China(No.51205005);the Beijing Science and Technology Innovation Service Ability Building(No.PXM2017-014212-000013). 摘　　要：A continuous spectrum water quality on-line monitoring signal processing method based on Hilbert-Huang transform(HHT) is proposed in this paper, which combines the micro-reagent water quality on-line monitoring technology of sequential injection. The modulation signal and spectrum curve of each intrinsic mode function(IMF) component of the original spectrum signal were obtained by empirical mode decomposition(EMD). The water sample data of different concentrations in the continuous spectrum on-line monitoring system was analyzed by the HHT model. The noise signal was excavated to realize the noise reduction processing, and the reconstruction of the continuous spectrum signal was realized after the noise reduction processing was completed. The research results show that this method can effectively reduce the noise of continuous spectrum signals according to different signal-to-noise characteristics of continuous spectrum, and has convenient use, fast processing speed, and high resolution in the time-frequency domain, which effectively improves the stability and accuracy of the micro-reagent continuous spectrum water quality on-line monitoring system. 关键词：SIGNAL SPECTRUM continuous

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Study on denoising of continuous spectrum on-line monitoring signal of water quality with micro-reagents based on HHT

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