An Inertial Measurement Unit or IMU sensor uses a combination of accelerometers, gyroscopes and magnetometers to report on the force, angular rate and orientation of a body in motion.

Magnetometer#

• WitMotion High-Precision RM3100 Military-grade Magnetometer (Sensor Magnetic Field Module Digital Electronic Compass For MCU, about US$40)

Comparison of various IMUs:#

Adafruit's "learn" pages include a comparison of the following boards:

• L3GD20 3 Axis MEMS Gyroscope - ST
• FXAS21002C 3 Axis MEMS Gyroscope - NXP
• LSM9DS0 9 Axis* MEMS Sensor (Accel + Mag + Gyro) - ST
• LSM9DS1 9 Axis* MEMES Sensor (Acce + Mag + Gyro) - ST
• MPU-9250 9 Axis* MEMS Sensor (Accel + Mag + Gyro) - Invensense
• BMI055 6 Axis MEMS Sensor (Accel + Gyro) - Bosch (Used in the BNO055)

Pages Tagged as 'IMU'#

References#

• Comparing Gyroscope Datasheets from Adafruit
• Inertial Measurement Unit on Wikipedia
• How to Fuse Motion Sensor Data into AHRS Orientation (Euler/Quaternions) (Adafruit Learning)