面向机械振动信号采集的无线传感器网络节点设计

针对现有无线传感器网络节点的不足和机械振动信号采集的需求，设计了一种可实现机械振动信号采集和片上处理的无线传感器网络节点。该节点采用MEMS加速度传感器拾取振动信号，以低功耗FPGA芯片为控制核心，采用了可编程片上系统技术，将数据采集、存储、处理和传输等控制功能模块集成到单个FPGA芯片中。本文着重介绍了节点数据采集、存储和传输部分的硬件电路和控制逻辑设计，对比实验表明该节点能有效采集和监测机械振动信号。

Design of wireless sensor network node for collecting mechanical vibration signals

To overcome the shortcomings of the existing wireless sensor network (WSN) node and to achieve the requirements of mechanical vibration signal data acquisition, a WSN node, which can realize mechanical vibration signal acquisition and on-chip processing, was designed. A MEMS acceleration sensor was used to pick up the vibration signals and a low power consumption FPGA chip was used as the central processing unit. Thanks to the programmable system on chip (SOPC) technology, the data acquisition, storage, processing and transmission control modules were integrated into a single FPGA chip. This paper focused on the design of hardware circuit acnd control logic on data acquisition, storage and transmission. Comparative experiments show that the node can effectively acquire and monitor mechanical vibration signal.