基于MEMS的可穿戴无线体域网设计与实现

针对高精度低成本可穿戴式人体动作捕捉,采用MEMS微惯性传感单元(IMU)设计实现无线体域网系统.系统由六轴微惯性单元MPU-6050、三轴地磁仪AK8975、微处理器及射频模块CC2530构成.首先,详细讨论系统硬件构架和基于Z-Stack的软件构架,然后通过上位机Matlab用户程序进行数据采集与实验验证.实验结果表明,与其他微惯性传感器系统相比,本设计采用高集成度的芯片和无线通信方式,在减小硬件体积的同时能够获得较高精度的数据(角度传感器零漂＜1.5°),对实现可穿戴无线惯性测量有着积极的作用.

Design and Validation of Wireless Body Sensor Network Based on MEMS

To achieve highly accurate and low cost human motion capture,the design and validation of wireless body sensor network are proposed by using MEMS IMU(inertial measurement unit).The system consists of a six-axis IMU MPU6050,a three-axis electronic compass AK8975,and a micro processing unit (MPU) CC2530 integrated with a 8051 core and a 2.4 GHz RF module.The hardware design and Z-Stack-based software architecture of the sensor Mote are discussed in detail.A Matlab program is used to collect experimental data for the system verification.The system shows several advantages in high integration,compact volume,and accurate sensing capability,which is critical for wearable inertial measurement and body capture.