基于MPU-6050的步态信号采集系统  

Gait signal acquisition system based on MPU-6050

作　　者：谷丽华[1,2] 崔畅[1] 高松巍[1] 许会[1] 

机构地区：[1]沈阳工业大学信息科学与工程学院,沈阳110870 [2]沈阳化工大学信息工程学院,沈阳110142

出　　处：《沈阳工业大学学报》2015年第2期176-182,共7页Journal of Shenyang University of Technology

基　　金：国家自然科学基金仪表专项基金资助项目(60927004)

摘　　要：针对目前获取步态信号类型比较单一,只采集三轴加速度信息,可供分析的信号来源较少,多传感器组合应用存在传感器之间的轴间差等问题,设计了一种基于数字运动处理器的无线步态采集系统.传感器选择集成三轴加速度和三轴陀螺仪信号的MPU-6050以获得更多的步态信息,确保了无轴间差校准问题.系统主要由微控制器STC90LE52、运动传感器MPU-6050以及无线通信模块RF1100SE组成.由MPU-6050采集步态加速度和陀螺仪信号,STC90LE52读取数据并通过RF1100SE发送,接收端将接收到的数据通过串口送到计算机中.通过对数据进行分析可知,在步态信号中,重力方向和前进方向的加速度信号周期性较好,而陀螺仪的俯仰角信号周期性优于其他两个轴的信号.In order to solve the problems that the type of acquired gait signals is unitary,only three-axis acceleration information can be acquired,the signal sources available for the analysis is less,and the cross-axis difference between the sensors exists in multi-sensor combination application,a wireless gait signal acquisition system based on the digital motion processor was designed. The M PU-6050 sensor integrated with three-axis acceleration and three-axis gyroscope signals was selected to obtain more gait information,which could avoid the cross-axis difference calibration. The system was mainly composed of microcontroller STC90LE52,motion sensor M PU-6050 and wireless communication module RF1100 SE.The gait acceleration and gyroscope signals were acquired with the M PU-6050. In addition,the data were read with the STC90LE52 and were transmitted with the RF1100 SE. The receiving module sent the received data to the computer through the serial port. Through the data analysis,it can be found that the periodicity of acceleration signals in both gravity direction and forward direction is better in the gait signals. Furthermore,the periodicity of pitch angle signals of gyroscope is prior to that of the signals in the other two axes.

关 键 词：步态 数据采集 加速度传感器 陀螺仪 无线通信 微控制器 硬件设计 参数设置 

分 类 号：TP274.2[自动化与计算机技术—检测技术与自动化装置]