摘要
针对长时间运行手机计步软件对手机电量消耗较大的问题,提出一种低功耗手机计步算法。根据行走时手机三轴加速度数据变化呈现上下波动的特点,在加速度数据变化方向改变时记录最高极值点和最低极值点数值,当两个极值点的幅度值大于幅度阈值时进行计步。测试结果表明该算法总体平均计步准确性可达97%,并且能够从传感器采样功耗和CPU计算功耗两方面降低计步过程的功耗。
To reduce the energy consumption while running pedometer software for a long period of time, an low power consumption pedometer algorithm is proposed. Based on the fact that the directions of three-axis acceleration data changes as a wave while walking, the maximum point and the minimum point when the direction changes can be checked and recorded by this algorithm. When the range difference between the maximum point and the minimum point exceeds the threshold value, one count takes place. Testing results show that the total average accuracy of this pedometer algorithm can reach to 97%, and energy consumption can be reduced in both sampling process of accelerometer and execution process of CPU.
出处
《西安邮电大学学报》
2016年第1期106-109,共4页
Journal of Xi’an University of Posts and Telecommunications
基金
国家自然科学基金资助项目(61373116)
陕西省教育厅产业化培育资助项目(2012JC22)
西安邮电大学青年教师科研基金资助项目(ZL2014-29)
关键词
低功耗
计步算法
手机计步
low power consumption, pedometer algorithm, mobile phone pedometer
