摘要
基于无线传感器网络的储粮害虫声信号采集与监测系统已成为大规模粮仓中害虫监测系统的发展趋势。然而,现有的无线害虫声信号采集系统由于受无线网络带宽资源及采集节点硬件资源的限制,只能计算及传输少量的声信号特征参数,难以实现对大流量声信号的多点分布式采集与完整声信号的实时传输。为此,提出一种基于压缩感知的声信号采集方案。该方案既可以实现储粮害虫声信号特征参数的无线传输,还可根据用户需要将多点采集到的完整音频信号通过无线网络实时地传输至用户端,实现用户对粮仓虫害情况的实时监测。实验结果表明:该方案设计合理,在保证用户端接收信号误差小于0.5%的情况下,可有效地实现储粮害虫声信号的多点分布式采集与声信号的实时可靠传输。
Acoustic signal acquisition and monitoring system of stored grain pests based on wireless sensor networks has become a trend in a large-scale granary .However , due to the restrictions of the wireless network bandwidth resources and acquisition node hardware resources the existing wireless acoustic signal acquisition and monitoring system of stored grain pests can hardly achieve multi-point distributed acquisition and real-time reliable transmission of large flow of acoustic signal .For this problem , an acoustic signal acquisition scheme based on compressive sensing had been proposed in this paper , which not only can achieve the calculation and transmission of pests acoustic signal characteristic parameters but also can achieve real-time monitoring of the granary by collecting multi-point and real-time complete pests acoustic sig-nal .The experimental results show that：the proposed method is reasonable and feasible .In the circumstances that signal error is less than 0 .5%in the client side , by using the proposed method multi-point distributed acquisition and real-time reliable transmission of the acoustic signal had been achieved effectively .
出处
《农机化研究》
北大核心
2014年第5期83-87,93,共6页
Journal of Agricultural Mechanization Research
基金
浙江省自然科学基金项目(R1100015)
关键词
压缩感知
无线传感器网络
储量害虫
声信号处理
compressive sensing
wireless sensor networks
stored grain pests
acoustic signal processing
