PMT Fluorescence Signal Denoising Processing Based on Wavelet Transform and BP Neural Network

被引:0
作者
Liu, Jiehui [1 ,2 ]
Zhang, Yunhan [1 ,2 ,3 ]
Li, Jianshen [1 ,2 ]
Zhao, Yadong [3 ]
Guo, Jinxi [1 ,2 ]
Yang, Lijie [1 ,2 ]
Zhao, Haichao [4 ]
机构
[1] Hebei Univ Engn, Sch Mech & Equipment Engn, Handan 056038, Peoples R China
[2] Hebei Univ Engn, Key Lab Intelligent Ind Equipment Technol Hebei Pr, Handan 056038, Peoples R China
[3] Anyang Inst Technol, Sch Mech Engn, Anyang 455000, Peoples R China
[4] Handan Environm Protect Res Inst, Handan 050000, Peoples R China
来源
APPLIED SCIENCES-BASEL | 2024年 / 14卷 / 11期
关键词
BP neural network; data fusion; temperature drift; weak current signal detection; wavelet transform; LASER-INDUCED FLUORESCENCE; ABSORPTION-SPECTROSCOPY; CAVITY RING; SENSOR; TEMPERATURE; NOISE; SO2;
D O I
10.3390/app14114866
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Featured Application This study is aimed at the detection of sulfur dioxide concentration in the real environment. Due to the vast territory of China and the large temperature difference span between the north and the south, the current sulfur dioxide detection devices find it difficult to meet the requirements of portability, low-cost delivery, and temperature adaptability. A reliable real-time monitoring device and detection algorithm for sulfur dioxide concentration using PMT are proposed.Abstract Air is the environmental foundation for human life and production, and its composition changes are closely related to human activities. Sulfur dioxide (SO2) is one of the main atmospheric pollutants, mainly derived from the combustion of fossil fuels. But SO2 is a trace gas in the atmosphere, and its concentration may be less than one part per billion (ppb). This paper is based on the principle of photoluminescence and uses a photomultiplier tube (PMT) as a photoelectric converter to develop a device for real-time detection of SO2 concentration in the atmosphere. This paper focuses on the impact of noise interference on weak electrical signals and uses wavelet transform to denoise the signals. At the same time, considering that the photoelectric system is susceptible to temperature changes, a multi parameter fitting model is constructed, and a BP neural network is used to further process the signal, separating the real data from the original data. Finally, a high-precision and wide-range trace level sulfur dioxide concentration detection device and algorithm were obtained.
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页数:17
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