Imu and Gyro and other related

In the work contact with the gyroscope, and this Chinese expression in English there are many distinctions, such as MEMS, Gyro, IMU and so on.

Reference article:
"1" Baidu know: Gyro, compass, IMU, MEMS four differences
Principle of "2" Csdn:imu

From the beginning, the Gyro has two properties: the axis and the precession, thus invented the gyroscope.
The gyroscope itself measures the single-axis angular deviation of the instrument.
Then MEMS appears, micro-gyroscope, can be entered into the integrated circuit.
Finally, the magnetometer, pressure gauge, acceleration, MEMS gyroscope are integrated into the IMU (inertial measurement unit).

To synthesize the above, we generally use the IMU, gyroscope is only part of it, or just an imu commonly known.