农业机械学报2025，Vol.56Issue(5)：71-81,11.DOI:10.6041/j.issn.1000-1298.2025.05.007
基于CEEMDAN-小波阈值的电容式棉种监测信号降噪方法
Noise Reduction Method of Capacitive Cotton Seed Monitoring Signal Based on CEEMDAN-Wavelet Threshold
摘要
Abstract
Aiming at the problem that the signal generated in capacitive cotton seeding monitoring contained noise and thus the seeding information was not easy to be extracted,the CEEMDAN-wavelet threshold joint noise reduction method was proposed.Firstly,according to the detection principle of cotton seedling quality,the noisy simulation signal was constructed,and the empirical mode decomposition(EMD),ensemble empirical mode decomposition(EEMD)and complementary ensemble empirical mode decomposition with adaptive noise(CEEMDAN)denoising effects of three traditional methods were compared on normal seeding,missed seeding,and repeat seeding simulation signals.Secondly,the wavelet threshold denoising method was integrated into the CEEMDAN denoising method,and the threshold formula of the correlation coefficient was designed to differentiate a large number of intrinsic mode function(IMF)componented with a large number of noisy and IMF components with effective signals,and the noise in the noisy IMF components was removed and more of the shape characteristics of the original signal were retained,and the signal-to-noise ratio(SNR)of the omitted rebroadcasting was increased by 4.950 9 dB and 6.849 3 dB,respectively.The similarity of the curve(NCC)was increased by 0.028 0 and 0.054 9,and smoothness(SR)was decreased by 0.002 4 and 0.004 5,respectively,which improved the problem of the poor noise reduction effect of the CEEMDAN denoising method alone on the omitted replay signal.Finally,a rowing signal acquisition test platform was built to validate the proposed method,and the results showed that the method had good noise reduction and signal feature reduction capability,and after noise reduction,it implemented a noise reduction effect on the number of distinguished seeds.The results showed that the method had good noise reduction and signal feature reduction ability,and the noise reduction could realize monitoring of number of sown seeds.关键词
电容式棉种监测信号/CEEMDAN去噪/小波阈值去噪/齿盘式穴播器Key words
capacitive cotton seed monitoring signal/CEEMDAN denoising/wavelet threshold denoising/toothed plate dibblers分类
农业科技引用本文复制引用
杨苗,任玲,王双,李韬,张玉泉..基于CEEMDAN-小波阈值的电容式棉种监测信号降噪方法[J].农业机械学报,2025,56(5):71-81,11.基金项目
国家自然科学基金项目(52165036)、石河子大学高层次人才项目(RCZK2021B17)和石河子大学自主资助校级科研项目(ZZZC202105) （52165036）
