不同的传感器（磁力计，加速度计）如何工作以制作指南针-Android（Java）

Question

I have to implement a compass in Java (Eclipse) for Android Platform.

I am required to use NOT the phone's sensor, but a sensor that I am given (Sensortag cc2541)

This sensor has:

Magnetometer, Accelerometer, Gyroscope, etc..

So I was wondering in order to make a compass, which sensors do I exactly need? I am a bit lost. So the magnetometer returns Point 3D (xyz). The accelerometer returns Point 3D as well.

I just need a basic explanation on which sensors and how are they going to function for the creation of a compass

Answer 1

For a simple compass, just Magnetometer is needed. It gives you the vector of which it thinks to be north.

Accelerometer and Gyroscope can help you with the calculation by determining how the device is positioned.

Point3D is just a vector. You will need to know some vector math to fully understand and do calculations.