简体繁体 English

如何使用加速度计找到沿x轴的线性加速度

[英]How to find Linear acceleration along x-axis using accelerometer

原文 2016-11-02 19:53:15 7 1 android/ accelerometer/ android-sensors

I am currently working on an android app in which I want to get acceleration along only x-axis. 我目前正在开发一个Android应用，该应用中我仅想沿x轴获得加速度。 There are some confusions in mind which I want to clear. 我想清除一些困惑。

First confusion is regarding the output of accelerometer's x-axis data. 第一个困惑是关于加速度计x轴数据的输出。 Is it the acceleration or the velocity. 是加速度还是速度。 (Pardon me on bad physics concepts) . （请原谅我不好的物理概念） 。
Second confusion is that when I get the isolated reading of x-axis I get a change when phone tilts. 第二个困惑是，当我得到x轴的孤立读数时，当手机倾斜时会发生变化。 I don't want that. 我不要 I want the reading only when I move the phone horizontally. 我只在水平移动手机时才需要阅读。
Third problem is that I want to get the speed of phone's movement along x-axis by using above data. 第三个问题是我想通过使用上述数据来获得手机沿x轴移动的速度。 Is it possible? 可能吗？

I still doesn't know whether any of above is possible or not. 我仍然不知道以上任何一种方法是否可行。 Kindly enlighten me if it is? 请给我个启发吗？

1 个解决方案

It might be possible if your requirements allow for drift... 如果您的要求允许漂移，则有可能...

The accelerometer outputs acceleration. 加速度计输出加速度。
Are you certain your not moving it at all in the x-axis direction during rotation? 您确定旋转过程中根本不沿x轴移动它吗？ Also you may be seeing gravity come into play if the rotation aligns the X-axis with gravity's pull. 另外，如果旋转将X轴与重力的拉力对齐，您可能会发现重力起作用。 You will need to filter this out. 您将需要过滤掉它。
Your primary issue with this one will be that accelerometer data is very noisy and due to the double integral you will need to do to get the distance traveled (or even the single integral to get the velocity) you will experience drift.. If your requirements are tolerant of drift, then it can definitely work. 与此相关的主要问题是，加速度计数据非常嘈杂，由于需要双重积分才能获得行进的距离（甚至需要获得单个积分才能获得速度），所以您会遇到漂移。容忍漂移，那么它肯定可以工作。