Method and device for wheel suspension alignment

A method for wheel suspension alignment, the method comprising:

• carrying out a relative motion between a vehicle and four measuring heads of a wheel suspension alignment system at a constant or non-constant speed, the relative position of the measuring heads to one another being known, the wheel suspension alignment system having the four measuring heads situated in a known position with respect to one another, of which each has a monocular picture recording device, picture taking of the measuring heads taking place synchronized in time;
• recording at least three geometrical details of one wheel, respectively, of the vehicle during the execution of the relative motion, using each of the four measuring heads, that are synchronized with one another in time, in at least two positions of the vehicle;
• carrying out local 3D reconstructions for determining translation vectors, rotation vectors and wheel rotational angles between the at least two positions, as well as of wheel rotational centers and wheel rotational axes of the wheels from the recorded geometrical details;
• determining a common global scale for the measuring heads by scaling the translation vectors of the wheels, so that the translation vectors have the same length;
• and
• determining at least one of:
• a camber, a single toe, or a total toe of the vehicle.

A method for wheel suspension alignment, the method comprising:

• carrying out a relative motion between a vehicle and four measuring heads of a wheel suspension alignment system at a non-constant speed, the relative position of the measuring heads to one another being known, the wheel suspension alignment system having four measuring heads situated in a known position with respect to one another, of which each has a monocular picture recording device;
• recording at least three geometrical details of one wheel, respectively, of the vehicle during the execution of the relative motion, using each of the four measuring heads, that are synchronized with one another, in a plurality of positions of the vehicle;
• carrying out local 3D reconstructions for determining translation vectors, rotation vectors and wheel rotational angles between the positions, as well as wheel rotational centers and wheel rotational axes of the wheels from the recorded geometrical details;
• determining motion profiles of the wheels from the recorded motions of the geometrical details;
• synchronizing the motion profiles of the wheels by adjusting the motion profiles with respect to position, shape and scale;
• and determining at least one of:
• a camber, a single toe, or a total toe of the vehicle.

A device for aligning the wheel suspension geometry of a vehicle, comprising:

• a system of four measuring heads situated in a known position with respect to one another, of which each has a monocular picture recording device and is equipped, in operation, using the picture recording device, to record in each case at least three geometrical details of one wheel, respectively, of the vehicle standing in an initial position and a further position;
• and
• an evaluation device, which is equipped, in operation, to determine, from the motion of the recorded geometrical details, translation vectors and rotation vectors of the wheels, to determine a global scale by scaling the translation vectors of the wheels, in such a way that the translation vectors have the same length, and to determine at least one of:
• a camber, a single toe, or a total toe of the vehicle.

A device for aligning the wheel suspension geometry of a vehicle, comprising:

• a system of four measuring heads situated in a known position with respect to one another, of which each has a monocular picture recording device and is equipped so that picture taking of the measuring heads takes place synchronized in time, and using the picture recording device, during operation to record in each case at least three geometrical details of one wheel, respectively, of the vehicle during the execution of a motion of the vehicle at constant or at non-constant speed relative to the measuring heads;
• and
• an evaluation device, which is equipped, in operation, to determine, from the motion of the recorded geometrical details, translation vectors and rotation vectors of the wheels, to determine a common global scale factor by scaling the translation vectors of the wheels, in such a way that the translation vectors have the same length, and to determine at least one of:
• a camber, a single toe, or a total toe of the vehicle.

A device for aligning the wheel suspension geometry of a vehicle, comprising:

• a system of four measuring heads situated in a known position with respect to one another, of which each has a monocular picture recording device and is equipped, in operation, using the picture recording device, to record in each case at least three geometrical details of one wheel, respectively, of the vehicle during the execution of a motion of the vehicle at non-constant speed relative to the measuring heads;
• and
• an evaluation device, which is equipped, in operation, to determine motion profiles of the wheels from the motion of the recorded geometrical details, to determine, from the motion of the recorded geometrical details, translation vectors and rotation vectors of the wheels, to synchronize the motion profiles of the wheels by adjusting the motion profiles with respect to position, shape and scale, and to determine at least one of:
• a camber, a single toe, or a total toe of the vehicle.