Abstract: A method for determining long-term offset drifts of acceleration sensors in a motor vehicle is provided. In one step, the longitudinal vehicle speed is determined in the vehicle's center of gravity. In another step, the share of the driving dynamics in the longitudinal reference acceleration formula and in the transversal reference acceleration formula is calculated from the longitudinal vehicle speed and the yaw rate. In yet another step, the share of the driving dynamics in the reference acceleration on the vehicle level formula is calculated by converting the driving dynamic reference accelerations formula calculated for the center of gravity to the position formula and the orientation of the sensor formula. In a further step, the long-term offset drift of the sensor is determined from the measured values of the sensor and the share of the measured value in the driving dynamics by means of a situation-dependent averaging process.

Abstract: An inertial measurement unit (IMU) contains three linear acceleration sensors and three rotational speed sensors. For the sensors there are desired installation directions parallel to the co-ordinate axes of a Cartesian co-ordinate system which is fixed to the vehicle. The actual installation directions of the sensors may differ from the desired installation directions owing to incorrect orientations. By comparing accelerations which are measured by the linear acceleration sensors for different attitudes of the vehicle with acceleration values which are known for these different attitudes in the Cartesian co-ordinate system which is fixed to the vehicle, the actual installation directions of the linear acceleration sensors are determined. By using a co-ordinate transformation it is then possible to convert the measured accelerations into the actual accelerations.

Abstract: For determination of a relative movement of a chassis and a body of a wheeled vehicle, which is movably joined to the chassis, three linear accelerations of the wheeled vehicle, which extend perpendicular to each other, respectively, as well as at least two rotational speeds of one respective rotational movement or a component of a rotational movement about a coordinate axis of the wheeled vehicle are measured (in measuring device 1), the at least two coordinate axes running perpendicular to each other, respectively. A momentary position of the relative movement is determined (in evaluation unit 9) using the three linear accelerations and the at least two rotational rates.

Abstract: In order to determine a signal offset (OFF_SIG) of a pitch rate sensor of a vehicle (2), a signal (OMEGA_TETA_SIG) from the pitch rate sensor is detected. Longitudinal acceleration (ACC) of the vehicle (2) is determined. A time derivative (ACC_DRV) of the longitudinal acceleration (ACC) is determined. A check is carried out in order to determine whether a magnitude of the time derivative (ACC_DRV) of the longitudinal acceleration (ACC) is less than a first predefined threshold value (THD—1). The signal offset (OFF_SIG) of the pitch rate sensor is determined on the basis of the signal (OMEGA_TETA_SIG) from the pitch rate sensor if the magnitude of the time derivative (ACC_DRV) of the longitudinal acceleration (ACC) is less than the first predefined threshold value (THD—1).

Abstract: For monitoring of a measuring device (1), located in a wheeled vehicle, the measuring device (1) is configured so as to measure three linear accelerations (in unit 3) of the wheeled vehicle, which extend perpendicular to each other, respectively, as well as three rotational speeds (in unit 4) and one respective rotational movement or a component of a rotational movement about an axis of the wheeled vehicle, the three axes running perpendicular to each other, respectively. At least components of an orientation of the wheeled vehicle in a vehicle-external coordinate system are determined (in unit 7) from the three rotational speeds, and at least one of the measured linear accelerations is monitored (in unit 9) using at least the components of the orientation and a comparative variable (from unit 8).

Abstract: A method for determining long-term offset drifts of acceleration sensors in a motor vehicle has the steps:—the longitudinal vehicle speed Vx is determined in the vehicle's center of gravity;—the share of the driving dynamics in the longitudinal reference acceleration formula (I) and in the transversal reference acceleration formula (II) is calculated from the longitudinal vehicle speed Vx and the yaw rate ?Z;—the share of the driving dynamics in the reference acceleration on the vehicle level formula (III) is calculated by converting the driving dynamic reference accelerations formula (IV) calculated for the center of gravity to the position formula (V) and the orientation ? of the sensor formula (VI);—the long-term offset drift of the sensor is determined from the measured values of the sensor and the share of the measured value in the driving dynamics by means of a situation-dependent averaging process.

Abstract: An inertial measurement unit (IMU) contains three linear acceleration sensors and three rotational speed sensors. For the sensors there are desired installation directions parallel to the co-ordinate axes of a Cartesian co-ordinate system which is fixed to the vehicle. The actual installation directions of the sensors may differ from the desired installation directions owing to incorrect orientations. By comparing accelerations which are measured by the linear acceleration sensors for different attitudes of the vehicle with acceleration values which are known for these different attitudes in the Cartesian co-ordinate system which is fixed to the vehicle, the actual installation directions of the linear acceleration sensors are determined. By using a co-ordinate transformation it is then possible to convert the measured accelerations into the actual accelerations.

Abstract: For determination of dynamic axle and/or wheel loads of a wheel vehicle (20), wherein for said wheel vehicle (20), at least two linear transversally oriented with respect to each other accelerations and three rotation rates of a rotation movement around the coordinate axis of the vehicle (20) or of the component of the coordinate axis are respectively measured by a measuring device (1). The three coordinate axes extend transversally with respect to each other and at least one axle load and/or wheel load of the wheel vehicle (20) are determined by means of at least two linear accelerations and three rotation rates with the aid of evaluation device (9).

Abstract: For monitoring of a measuring device (1), located in a wheeled vehicle, the measuring device (1) is configured so as to measure three linear accelerations (in unit 3) of the wheeled vehicle, which extend perpendicular to each other, respectively, as well as three rotational speeds (in unit 4) and one respective rotational movement or a component of a rotational movement about an axis of the wheeled vehicle, the three axes running perpendicular to each other, respectively. At least components of an orientation of the wheeled vehicle in a vehicle-external coordinate system are determined (in unit 7) from the three rotational speeds, and at least one of the measured linear accelerations is monitored (in unit 9) using at least the components of the orientation and a comparative variable (from unit 8).

Abstract: For determination of dynamic axle and/or wheel loads of a wheel vehicle (20), wherein for said wheel vehicle (20), at least two linear transversally oriented with respect to each other accelerations and three rotation rates of a rotation movement around the coordinate axis of the vehicle (20) or of the component of the coordinate axis are respectively measured by a measuring device (1). The three coordinate axes extend transversally with respect to each other and at least one axle load and/or wheel load of the wheel vehicle (20) are determined by means of at least two linear accelerations and three rotation rates with the aid of evaluation device (9).

Abstract: For determination of a relative movement of a chassis and a body of a wheeled vehicle, which is movably joined to the chassis, three linear accelerations of the wheeled vehicle, which extend perpendicular to each other, respectively, as well as at least two rotational speeds of one respective rotational movement or a component of a rotational movement about a coordinate axis of the wheeled vehicle are measured (in measuring device 1), the at least two coordinate axes running perpendicular to each other, respectively. A momentary position of the relative movement is determined (in evaluation unit 9) using the three linear accelerations and the at least two rotational rates.