随着无线传感网络中节点数量的增加,传统的单路射频通信会出现同频干扰、数据丢失和接收速度慢等问题。为此本文设计了一种基于多射频多信道的无线传感网络终端设备。该设备采用国产微处理器与4路射频连接的分体式架构,对固定信道分配算法进行优化,采用二级星型拓扑结构使得射频同时工作期间不产生干扰,基于频分多址和时分多址相结合的通信协议来解决数据冲突问题。通过对比实验,该终端设备信息处理速率为2 008.5 kb/s,系统的丢包率为0.78％,在信道利用率、数据处理速率和系统稳定性方面优于传统单信道设备。

With the increase of the number of nodes in the wireless sensor network,the traditional single-channel radio frequency communication will encounter problems such as co-channel interference,data loss and slow reception rate.To solve this situation,a wireless sensor network terminal equipment based on multi-radio frequency and multi-channel is designed.The device adopts the split structure of domestic microprocessor and 4-channel radio frequency connection,optimizes the fixed channel allocation algorithm,and adopts two-level star topology to prevent interference during the simultaneous operation of the radio frequency.Based on frequency division multiple access and time division multiple access combined communication protocol to solve the problem of data conflict.Through comparative experiments,the information processing rate of the terminal equipment is 2 008.5 kbps,and the packet loss rate of the system is 0.78%,which is superior to traditional single-channel equipment in terms of channel utilization,data processing rate and system stability.