加速度计低通滤波器平滑 [英] Accelerometer Low Pass Filter Smoothing

问题描述

我正在使用设备加速度计，并尝试平滑加速度计数据 CMAcceleration 。

I am using the device accelerometer and try to smooth the Accelerometer Data CMAcceleration.

我正在执行此操作借助以下代码：

I am doing this with help of this code:

-(void)proccessAccelerometerData:(CMAcceleration)accelData {
    currentAccelX = (kUpdateInterval * accelData.x) + ((1.0 - kUpdateInterval) * currentAccelX);
    currentAccelY = (kUpdateInterval * accelData.y) + ((1.0 - kUpdateInterval) * currentAccelY);
}

currentAccelX 和 currentAccelY 是最后的加速度计x和y数据。

Which currentAccelX and currentAccelY is the last accelerometer x and y data.

现在，我有了平滑的x和y值，什么是我的x或y值来确定用户向左/向右/向上/向下移动设备的ID？

Now, I have the smooth x and y values, What is my value of x or y to determine id the user move the device left/right/up/down?

只是为了使情况更清楚，例如，我有4个按钮，每个按钮分别用于向左/向右/向上/向下的方向，我想确定用户用户向哪个方向滑动设备？ （不滑动手势）。
预先感谢！

Just to make things more clear, for example, let's say that I have 4 buttons, one for each direction left/right/up/down and I want to determine which direction the user user swipe the device? (not swipe gesture). Thanks in advance!

推荐答案

假设设备以纵向放置，则x轴指示移动到

y轴指示设备上下移动（正y向上，负y向下） 。

z轴指示设备向前和向后移动（正z朝向用户，负z远离用户）。

有一个信息图形由Apple提供： developer.apple.com

Assuming you hold the device in portrait orientation, the x-Axis indicates the movement to the left and right (positive x is to the right and negative x to the left).
The y-Axis indicates the movement of the device up and down (positive y is upwards and negative y is downwards).
The z-Axis indicates the movement of the device forwards and backwards (positive z is towards the user and negative z is away from the user).
There is an info graphic by Apple: developer.apple.com

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