公开(公告)号：US20150185044A1

公开(公告)日：2015-07-02

申请号：US14328326

申请日：2014-07-10

Applicant: INVENTEC APPLIANCES CORP.

Inventor： Dao-Cai Nie ,  Shieng-Ting Kao

IPC: G01C22/00 ,  G01P15/00

CPC classification number: G01C22/006

Abstract: The present invention provides a step counting method and a pedometer based on 3-axis accelerometer. The method of the present invention comprises: collecting a 3-axis acceleration; calculating sum of squares for the 3-axis acceleration to generate a standard acceleration; smoothing the standard acceleration to generate a processed acceleration; acquiring maximum and minimum of all processed acceleration during a period, calculating the difference between the maximum and the minimum, and setting a current time window according to the difference; determining whether there are at least three serial processed accelerations decrease progressively; if yes, confirming the collected time for the first processed acceleration of the at least three serial processed accelerations to be a current step starting time; determining whether a time difference between the two serial current step starting time falls within the current time window, if yes, adding step counting. The present invention can enhance the preciseness of step counting.

Abstract translation: 本发明提供一种基于3轴加速度计的步数计数方法和计步器。 本发明的方法包括：收集3轴加速度; 计算3轴加速度的平方和以产生标准加速度; 平滑标准加速度以产生加工的加速度; 在一段时间内获取所有处理的加速度的最大值和最小值，计算最大值与最小值之间的差值，并根据差值设置当前时间窗口; 确定是否至少有三个连续处理的加速度逐渐降低; 如果是，则确认所述至少三个串行处理加速度的第一加速加速度的收集时间为当前步骤开始时间; 确定两个串联电流阶跃开始时间之间的时间差是否落在当前时间窗口内，如果是，则添加步进计数。 本发明可以提高步数计数的精度。

公开(公告)号：US09791295B2

公开(公告)日：2017-10-17

申请号：US14328326

申请日：2014-07-10

Applicant: INVENTEC APPLIANCES CORP.

Inventor： Dao-Cai Nie ,  Shieng-Ting Kao

IPC: G01C22/00

CPC classification number: G01C22/006

Abstract: The present invention provides a step counting method and a pedometer based on 3-axis accelerometer. The method of the present invention comprises: collecting a 3-axis acceleration; calculating sum of squares for the 3-axis acceleration to generate a standard acceleration; smoothing the standard acceleration to generate a processed acceleration; acquiring maximum and minimum of all processed acceleration during a period, calculating the difference between the maximum and the minimum, and setting a current time window according to the difference; determining whether there are at least three serial processed accelerations decrease progressively; if yes, confirming the collected time for the first processed acceleration of the at least three serial processed accelerations to be a current step starting time; determining whether a time difference between the two serial current step starting time falls within the current time window, if yes, adding step counting. The present invention can enhance the preciseness of step counting.