iPhone / iPad陀螺仪 [英] iPhone/iPad gyroscope

问题描述

我从未真正理解陀螺仪在iPhone / iPad上的应用，它是否具有与加速度计类似的功能，但是对加速度计的改进是什么？它的实际用途是什么？

I never really understand the applications of the gyroscope on the iPhone/iPad, does it serve the similar function as the accelerometer but like an improvement to the accelerometer? What is the practical use of it?

推荐答案

加速度计是方向的直接测量，而陀螺仪是测量方向取向的时间变化率。 (1)
通过梳理两个传感器的输出，称为传感器融合，可以精确，快速地确定设备的方向。
如果你只使用带有低通滤波器的加速度计，你仍然可以得到合理的方向估计，但它会滞后。

"An accelerometer is a direct measurement of orientation, while a gyro is a measurement of the time rate of change of orientation." (1)
By combing the output of the two sensors, called sensor fusion, one can determine the orientation of the device precisely and fast. If you only use accelerometer with a low-pass filter, you still get a reasonable estimate for the orientation but it will lag.

这是这两个（Google Tech Talk）的精彩现场演示，从21:50开始。

Here is an excellent live demo of both (Google Tech Talk), starting at 21:50.

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