小波去噪在非合作目标激光甲烷遥测中的应用  

Application of Wavelet Denoising in Non-Cooperative Target Laser Methane Telemetry

作　　者：姜静 程跃 殷松峰 刘东 周振 Jiang Jing;Cheng Yue;Yin Songfeng;Liu Dong;Zhou Zhen(School of Electric and Information Engineering,Anhui Jianzhu University,Hefei 230601,Anhui,China;Hefei Institute of Public Safety Research,Tsinghua University,Hefei 230601,Anhui,China;Hefei Qingxin Sensor Technology Co.,Ltd.,Hefei 230601,Anhui,China;School of Mechanical and Electrical Engineering,Anhui Jianzhu University,Hefei 230601,Anhui,China)

机构地区：[1]安徽建筑大学电子与信息工程学院,安徽合肥230601 [2]清华大学合肥公共安全研究院,安徽合肥230601 [3]合肥清芯传感科技有限公司,安徽合肥230601 [4]安徽建筑大学机械与电气工程学院,安徽合肥230601

出　　处：《应用激光》2024年第3期132-141,共10页Applied Laser

基　　金：清华大学合肥公共安全研究院开放课题(No.QHHFYKF202202);国家重点研发计划课题(2019 YFC0810901)。

摘　　要：针对非合作目标激光甲烷遥测噪声复杂、信噪比低、检测限差等问题,开展小波去噪在非合作目标激光甲烷遥测中的应用研究。通过对系统实际测量信号小波去噪分析,确定了最优去噪方法为coif5小波基7层分解固定软阈值法。开展小波去噪对遥测系统的标定、测量误差及检测下限等性能参数的研究,研究结果表明,小波去噪后系统的测量误差范围由-2.89%~7.20%减小为-2.32%~6.51%,检测下限由425.664 7×10-6m(3σ)提高到104.839 0×10-6m(3σ),检测下限提高了3倍。选取的小波去噪方法对非合作目标激光甲烷遥测系统的复杂噪声去噪效果显著,可大大提升系统的探测性能。This study addresses challenges in non-cooperative target laser methane telemetry,including complex noise,low signal-to-noise ratio,and detection limit issues.We explore the application of wavelet denoising as a solution to these challenges.By analyzing actual measurement signals,we identify the coif5wavelet-based 7-layer decomposition fixed soft threshold method as the optimal denoising approach.The performance parameters such as calibration,measurement error and detection limit of the telemetry system by wavelet denoising are studied.The results show that the measurement error range of the system after wavelet denoising is reduced from-2.89%~7.20% to-2.32%~6.51%,the detection limit was increased from 425.6647×10^(-6)m(3σ)to 104.8390×10^(-6)m(3σ),and the detection limit was increased by 3 times.The selected wavelet denoising method significantly reduces complex noise in the non-cooperative target laser methane telemetry system,potentially enhancing its detection performance.

关 键 词：小波去噪 非合作目标 甲烷 激光遥测 

分 类 号：X831[环境科学与工程—环境工程]