基于流动噪声干扰消除的水坝传感信号定位  

Dam sensing signal location algorithm based on flow noise elimination

作　　者：郭小波[1] 李松涛[1] 

机构地区：[1]河南工程学院计算机学院,河南郑州451191

出　　处：《计算机工程与设计》2017年第6期1458-1463,共6页Computer Engineering and Design

基　　金：国家863高技术研究发展计划基金项目(2012AA101008);河南省高等学校重点科研项目应用研究计划基金项目(16B520007)

摘　　要：为解决水坝传感网系统部署过程中无法消除复杂流动噪声,导致其难以快速定位故障发生地点的不足,提出基于复杂流动噪声干扰消除机制的水坝传感信号定位算法。通过对接收信号进行时域傅氏变换,降低流动性噪声对传感信号的分段混沌影响,提高网络对信号定位的敏感度。通过多径传输机制,针对可能发生的频率偏移进行参数估计,降低峰值噪声信号对传感信号的渗透影响,提高传感网络对定位信号的捕获精确度,根据噪声分布的统计特征,构建虚拟预警机制,提高传感网络对弱定位信号的捕获检测率,降低定位误差度。仿真结果表明,与Pre-GPS算法及Plus-GPS算法相比,所提算法具有更高的定位精度,且捕获过程中的虚拟预警效率更高。To solve the problem that the complex flowing noise can not be eliminated during the deployment process of thedam sensor system,which makes it difficult to fast locate the failure position,a signal location algorithm for dam sensors was proposed based on the complex flowing noise elimination mechanism.Fourier transform in time domainwas performed towards the received signals,to reduce the influence of piecewise chaos of signals caused by flowing noise,and also to improve the sensitivity of network to signal location.Through the multipath transmission mechanism,the parameters estimation of the possible frequency offset was carried out to reduce the infiltrationinfluence of the peak noise signal on the sensing signal and to improve the accuracy of the acquisition of the locating signals by the sensor network.According to the statistical characteristics of the noise distribution,a virtual early warning mechanism was constructed to improve the detection rate of the weak location signal and reduce the positioning error.Simulation results show that,compared with the Pre-GPS and the Plus-GPS algorithms,the proposed algorithm has higher positioning accuracy,and the efficiency of the virtual alert during the acquisition process is higher.

关 键 词：传感信号定位 复杂流动噪声 多径传输机制 频率偏移 虚拟预警 

分 类 号：TP393.04[自动化与计算机技术—计算机应用技术]