基于CC1310芯片的多通道高速率低功耗无线传感系统

Multi-channel wireless sensor system based on CC1310 chip wtih high speed and low power consumption

为有效减轻新一代运载火箭传感器数据采集与传输系统的质量,设计并实现了基于CC1310芯片的无线传感器系统。采用频分复用(FDM)结合时分复用(TDM)的方式完成多节点组网并实施分组管理,组间频分复用既实现了节点数的扩增,又提升了传输速率复用倍数,分组数为4时子节点数量可达100个以上。提出主节点授时法结合多节点分时传输协议的优化设计方法,保证多节点高精准同步,避免节点间碰撞,获得了最优的组内可达速率;设计节点唤醒/休眠模式切换策略,有效降低了系统功耗。实测结果表明:2个主节点带5个子节点并行工作时,传输速率可达400 Kbps,且主节点数量增加时,系统的传输速率成比例增大;单个子节点忙时功耗不超过60 mW,闲时功耗不超过12 mW,平均功耗为15.2 mW,符合低功耗要求;同时,所设计的无线传感系统具备良好的可靠性和鲁棒性。

In order to effectively reduce the weight of sensor data acquisition and transmission system for the new-generation launch vehicle,a wireless sensor system based on chip CC1310 was designed and implemented.Multi-node networking and group management are accomplished using frequency division multiplexing(FDM) and time division multiplexing(TDM).The FDM scheme among groups not only increases the number of nodes,but also improves the transmission rate multiplexing multiple.When there are four groups,the system is capable of supporting more than 100 sub-nodes.In order to ensure high precision synchronization of multi-nodes,avoid node collisions,and obtain the optimal intra-group achievable rate,we also suggested an optimal method of master node timing in combination with a multi-node time-sharing transfer protocol.Moreover,a node wake-up/idle mode switching strategy is designed to reduce system power consumption effectively.The experimental results show that the transmission rate can reach 400 Kbps when two master nodes work in parallel with five sub-nodes,and the transmission rate will increase proportionally when the number of master nodes rises.The power consumption of the single sub-node is less than 60 mW during work hours and less than 12 mW during idle hours.The average power consumption of the single sub-node is 15.2 mW,which meets the requirements of low power consumption.At the same time,the wireless sensor system designed in this paper has good reliability and robustness.