基于WiFi散射通信技术的超低功耗放射源监测节点

Ultra-low Power Radioactive Source Monitoring Node Based on WiFi Scatter Communication Technology

针对传统放射源监测节点功耗大的问题,研制一种超低功耗放射源监测节点。基于散射通信原理,重点研究散射节点的低功耗设计,提出一种“DMA+USCI+XOR”方案,生成符合纳秒级时序要求的散射调制信号,在低功耗MSP430平台实现WiFi散射通信。系统不仅可用于放射源的监测领域,而且还可用于可穿戴设备等其他物联网领域,具有广阔的应用前景。

Aiming at the problem of large power consumption of traditional radioactive source monitoring nodes,an ultra-low power radioactive source monitoring node was developed.Based on backscatter communication theory,we focus our research on the low power design of the backscatter node.We propose a“DMA+USCI+XOR”scheme to generate a backscatter modulation signal,whose timing accuracy is required to reach nanosecond-level,and realize WiFi scattering communication based on low-power MSP430 processor.The system can be used not only in the field of monitoring of radioactive sources,but also in other Internet of Things fields such as agriculture,industry,and wearable devices,and has broad application prospects.