基于三轴加速度传感器的人机交互智能手环

Human-computer interaction intelligent bracelet based on triaxial acceleration sensor

针对人们对人体运动状态监测的需求,设计了基于微机电系统(micro electro mechanical systems,简称MEMS)数字输出加速度传感器ADXL345与超低功耗单片机MSP430F169的计步手环和基于Android系统的手机应用程序(APP)。该手环用传感器ADXL345采集人体行走时的加速度信息,利用矢量求和算法实现计步功能,并估算行走过程中的热量消耗;手环通过蓝牙方式与Android手机通信,从而在手机上实现计步数据与卡路里消耗的显示,并可在手机上对手环的DS1337时钟芯片进行闹钟设置。通过对2名男性和2名女性分别进行60s步行测试,测试结果表明,该系统运行可靠,计步算法适应性良好,具有体积小、功耗低、工作稳定、计步准确、人机交互友好等特点。

An intelligent pedometer bracelet is designed to meet the significant demand of body movement monitoring.The MSP430F169 is selected as the microcontroller,and the triaxial accelerometer ADXL345 is applied to collect the information on the body.The vector summation of triaxial acceleration is used to counter the step,and the calorie is estimated.HC-06 Bluetooth module is used to communicate with Android phones for achieving the information of pedometer and calorie.The alarm clock can be set by the DS1337 clock chip.2males and 2females are participated in one minute walking test,experimental results show that the system has the reliable performance and a strong adaptability.It has the advantages of portable type and low power consumption.