| MATLAB在植物电信号降噪处理中的应用 |
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| 引用本文： | 胡俊海,齐迹,王英男,武海巍,朱凤武,袁月明.MATLAB在植物电信号降噪处理中的应用[J].农业工程,2017,7(4):41-44. |
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| 作者姓名： | 胡俊海 齐迹 王英男 武海巍 朱凤武 袁月明 |
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| 作者单位： | 吉林农业大学工程技术学院，长春130118 |
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| 基金项目： | 吉林农业大学科研启动基金(201605) |
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| 摘 要： | 植物电信号具有复杂性和时变非稳态特性，在获取有用信号前，需要对原始信号进行预处理，并将采集的信号严格地限制在有用的频段内。首先对信号进行低通滤波，以抑制高频噪声；然后采用陷波滤波器消除因测试环境中的有源设备而引起的50 Hz工频干扰。另外，采用小波降噪的方法处理采集的信号，更容易地分离出噪声或其他不需要的信息。通过MATLAB语言进行编程，设计数字滤波器，对信号进行预处理，并且用小波分析方法对信号进行分析，实现了降噪和去除干扰的目的，从而对植物电信号进行有效的分析。
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| 关 键 词： | 植物电信号 数字滤波器 小波分析 降噪 |
Application of MATLAB in De-noising of Plant Electrical Signal |
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| Hu Junhai,Qi Ji,Wang Yingnan,Wu Haiwei,Zhu Fengwu and Yuan Yueming.Application of MATLAB in De-noising of Plant Electrical Signal[J].Agricultural Engineering,2017,7(4):41-44. |
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| Authors: | Hu Junhai Qi Ji Wang Yingnan Wu Haiwei Zhu Fengwu and Yuan Yueming |
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| Abstract: | The plant electrical signal is very complex，with non-steady-state and time-varying.Before acquiring a useful signal，original signal needs to be preprocessed and acquired signal is strictly limited to useful frequency band.First，the signal is low-pass filtered to keep high frequency noise；and then notch filter is used to eliminate existence of the 50 Hz frequency interference caused by active equipment in test environment.The wavelet de-noising method is used to process acquired signals，so that noise or other unnecessary information can be separated more easily.Through programming in MATLAB language，digital filter was designed to realize pretreatment of signal.The method of wavelet analysis was used to analyze signal，and purpose of noise reduction and interference removal was achieved，so plant electrical signal was analyzed effectively. |
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