基于MPU6000的低功耗无线人体传感器网络节点设计

Design of Low- Power Wireless Body Sensor Network Node Based on MPU6000

针对有线人体传感器网络节点具有携带不便、传输距离有限的缺点,设计并实现了一种用于人体运动监测的无线人体传感器网络节点;文中首先介绍了节点的硬件设计实现方案,节点控制器采用MSP430F2418PM,传感器采用六轴惯性传感器模块MPU6000,射频模块采用nRF24L01;然后对软件设计实现流程和节点的节能工作模式进行了详细阐述和实验验证;实验结果表明,该研究实现的无线节点具有反应灵敏和功耗低的特点,在15 m范围内无线传输稳定,最高传输速率可达2 Mbps,采集的惯性数据能够明显反映人体的正常运动和跌倒的特征;该节点在人体异常步态监测、康复评估和跌倒预警等方面具有潜在重要应用价值。

In view of the disadvantages of poor portability and limited transmission distance in wired body sensor network system, a wire less body sensor network node was designed and realized for the measurement of human motion. Firstly the hardware design and implementa- tion procedure of node was described, such as the node controller using MSP430F2418PM, the sensors using six -- axis inertial sensor mod- ule MPU6000, and RF module using NRF24L01. Then software implementation of node and power saving mode was expounded and verified in detail The experimental result showed that the wireless nodes had the characteristics of sensitivity and low power consumption, the wire less transmission was stability within 15m and maximum transfer rate was up to 2 Mbps. The collected inertial data could be very easy to rec- ognize the normal movements of human body and falls. The node system has important potential applications in human abnormal gait monito ring, rehabilitation evaluation and pre--impact fall alarm.