Which sensors can you use to get the orientation of the device?

The Android platform provides two sensors that let you determine the position of a device: the geomagnetic field sensor and the accelerometer.

How does accelerometer detect orientation?

Even if a device with an accelerometer is not moving, the accelerometer can detect the orientation (tilt) of the device by measuring the acceleration due to Earth’s gravity, which is a constant downward force acting on all objects.

What is accelerometer and gyroscope in smartphones?

Accelerometers in mobile phones are used to detect the orientation of the phone. An accelerometer measures linear acceleration of movement, while a gyro on the other hand measures the angular rotational velocity. Both sensors measure rate of change; they just measure the rate of change for different things.

How do I measure the orientation of an ideal magnetometer?

Use an imuSensor System object to mimic data received from an IMU that contains an ideal magnetometer and an ideal accelerometer. Pass the accelerometer data and magnetometer data to the ecompass function to estimate orientation over time. Convert the orientation to Euler angles in degrees and plot the result.

Can pitch and roll angles be used to rotate magnetometer?

However, The pitch and roll angles in the code are both relative the horizon, not a set of euler angles that define a rotation between two states; because of this, they do not compose to rotate the magnetometer back into the global xy frame like I assume the equations are trying to do.

What is the N-by-3 matrix for magnetometer readings?

Magnetometer readings in sensor body coordinate system in µT, specified as an N -by-3 matrix. The columns of the matrix correspond to the x -, y -, and z -axes of the sensor body. The rows in the matrix, N, correspond to individual samples. The magnetometer readings are normalized before use in the function.

How is data recorded when a device is rotated?

Accelerometer, gyroscope, and magnetometer sensor data was recorded while a device rotated around three different axes: first around its local Y-axis, then around its Z-axis, and finally around its X-axis. The device’s X-axis was generally pointed southward for the duration of the experiment.