无线传感网络中通用信号采集系统设计

Design of universal signal acquisition system in wireless sensor network

无线传感网络中通用信号的庞大数量对无线传感网络中通用信号采集系统的信号失效率提出较高的要求。为此,设计信号失效率小的无线传感网络中通用信号采集系统,该系统的核心元件为CC2430,MEMS加速度传感器和网络协调器。信号识别模块中的CC2430将无线传感网络中的初始通用信号识别出来后,对其进行信号放大等操作,并传输给信号加速模块中的MEMS加速度传感器进行加速处理。经加速处理后的初始通用信号会被传输到组网传输模块,该模块中的网络协调器通过组网的方式,为通用信号提供高速传输通道。软件部分设计了网络协调器组网流程图,以及USB串行外设接口进行读/写的代码。实验结果表明,所构建的系统能够快速识别、快速传输无线传感网络中的通用信号,系统信号失效率较低。

Since the large quantity of general signals in wireless sensor network has high requirement for the signal failure rate of the universal signal acquisition system in wireless sensor network,the universal signal acquisition system with low signal failure rate in wireless sensor network was designed. The CC2430,MEMS acceleration sensor and network coordinator are taken as the core components of the system. The CC2430 in signal recognition module is used to identify the initial universal signal in the wireless sensor network,then amplify the signal,and transmit the MEMS acceleration sensor in signal acceleration module for acceleration processing. After that,the initial universal signals are transmitted to the networking transport module. The network coordinator in the module provides the high- speed transmission channel in the networking mode for the universal signals.The networking flow chart for network coordinator and the codes for the USB serial peripheral interface to read and write were designed in software. The experimental result shows that the system can quickly identify and transmit the universal signals in wireless sensor network,and has low signal failure rate.