System for checking an inertial measurement unit

A system for checking an inertial measurement unit (IMU) of a land vehicle (V) during driving, comprising:

• the inertial measurement unit (IMU) having precisely three sensors comprising:
• a first sensor comprising a first acceleration sensor configured to measure a translational acceleration along a first sensor axis and/or a first rate-of-rotation sensor configured to measure a rate of rotation about the first sensor axis,
• a second sensor comprising a second acceleration sensor configured to measure a translational acceleration along a second sensor axis and/or a second rate-of-rotation sensor configured to measure a rate of rotation about the second sensor axis, and
• a third rate-of-rotation sensor configured to measure a rate of rotation about a third sensor axis, the third sensor axis aligned along a vertical vehicle axis, and
• a sensing device that senses a movement of the vehicle (V) in a first vehicle direction and/or about the first vehicle direction,
• wherein both the first sensor axis and the second sensor axis are tilted with respect to the first vehicle direction wherein the first vehicle direction corresponds to a steering-free driving direction of the vehicle (V), an alignment of each of the acceleration sensors of the inertial measurement unit (IMU) respectively making the measurement of an acceleration component along the first vehicle direction possible,
• wherein each of the first and second sensor axes is tilted by an angle of 55°, with respect to the first vehicle direction, and
• wherein the first sensor axis and the second sensor axis and the third sensor axis measure components of the acceleration along the first vehicle direction, and the sensing device provides redundancy for calibration of the first sensor axis, the second sensor axis, and the third sensor axis.