【摘要】 采集玉米(Zea mays L)、芦荟(Aloe vera L)和吊兰(Chlorophytum comosum)三种植物叶片的表面电信号,通过小波变换对采集到的电信号进行降噪和重构,对降噪后的电信号进行功率谱分析。结果表明,玉米、芦荟和吊兰三种植物叶片电信号是幅值为μV级、频率分布在2 Hz以下的低频电信号。玉米叶片电信号的频率分布主要集中在0～0.4 Hz,芦荟叶片电信号频率分布主要集中在0～0.6 Hz,吊兰叶片电信号的频率分布主要集中在0～0.8 Hz。更多还原

【Abstract】 The electrical signals in the leaves of three species of plants including maize(Zea mays L),aloe(Aloe vera L) and broadleaf bracket-plant(Chlorophytum comosum) are collected,de-noised and reconstructed by wavelet transform in this paper.The power spectrum of these de-noised electrical signals was analyzed and the statistic parameters for these signals are obtained.The results show that the electrical signals in the leaves of three species of plants are the low-frequency signals whose amplitude is the μV level and distribution of frequency is in 0~2 Hz range.The frequency of signals in maize mainly concentrate in 0~0.4 Hz,aloe mainly in 0~0.6 Hz,and broadleaf bracket-plant in 0~0.8 Hz.更多还原