作物病害胁迫声发射信号与环境因子分析

Analysis of Crop Disease Stress Acoustic Emission Signals and Environmental Factors

构建了作物声发射信号和环境因子检测平台,将声发射采集卡采集的声发射信号和各环境因子传感器采集的数据经PCI接口输入计算机.对检测数据进行统计分析,给出了声发射信号频次和各参数的日变化曲线,对声发射信号与各环境因子进行相关分析.结果表明:病害初期的声发射频次较高,随作物病害程度加重,声发射频次减弱,并出现多峰现象;声发射信号与各环境因子之间具有一定的相关性.

A testing platform for collecting acoustic emission signals and environmental factors was constructed.Acoustic emission signals acquired with acoustic emission acquisition card and environmental data collected with sensors were input to computer by means of PCI interface.Based on statistical analysis on collected data,the frequency distribution of acoustic emission signals and the statistical curves of diurnal variation of parameters were given,correlation between acoustic emission frequency and environmental factors were analyzed.Experiments show that,in the early disease acoustic emission frequency is high,with the increased level of crop diseases,acoustic emission frequency becomes weaker,and the multi-peak phenomenon emerges.Acoustic emission frequency is correlated with environmental factors.