Abstract: In a method for determining a wheel or axle geometry of a vehicle, the following steps are provided: illuminating a wheel region with structured and with unstructured light during a motion of at least one wheel and/or of the vehicle; acquiring multiple images of the wheel region during the illumination, in order to create a three-dimensional surface model having surface parameters, a texture model having texture parameters, and a motion model having motion parameters of the sensed wheel region; calculating values for the surface parameters, the texture parameters, and the motion parameters using a variation computation as a function of the acquired images, in order to minimize a deviation of the three-dimensional surface model, texture model, and motion model from image data of the acquired images; and determining a rotation axis and/or a rotation center of the wheel as a function of the calculated values of the motion parameters.

Abstract: A chassis measuring system comprises an illumination device for producing a structured illumination (38, 58, 78, 98), which is developed in such a way that it produces a structured image on a measuring head (32, 52; 72, 92) situated opposite in the transverse vehicle direction, a reference surface (40, 60, 80, 100) facing in the same direction as the illumination device (38, 58, 78, 98), on which a structured image produced by an illumination device (38, 58; 78, 98) of the measuring head (32, 52; 72, 92) situated opposite in the transverse vehicle direction may be projected, and at least one measuring camera (34, 36; 54, 56; 74, 76; 94, 96) facing in the same direction as the illumination device (38, 58, 78, 98), which is developed in such a way that it detects the structured image on the reference surface (40, 60; 80, 100) of the opposite measuring head (32, 52; 72, 92) in order to determine the position parameters of the measuring head (32, 52, 72, 92).

Abstract: A method for checking the referencing of at least two measuring heads of a contactless chassis measuring system includes: detecting at least one geometry detail of a vehicle using the measuring heads; determining an initial position of the geometry detail in the coordinate system associated with each measuring head; transforming the initial position into a shared coordinate system; executing a relative movement between the measuring heads and the vehicle; determining a final position of the at least one geometry detail in the coordinate system associated with each measuring head; transforming the final position of the geometry detail into the shared coordinate system; determining the movement vectors from the difference between the final position and the initial position of the at least one geometry detail; checking the movement vectors for coincidence.

Abstract: In a method for determining a wheel or axle geometry of a vehicle, the following steps are provided: illuminating a wheel region with structured and with unstructured light during a motion of at least one wheel and/or of the vehicle; acquiring multiple images of the wheel region during the illumination, in order to create a three-dimensional surface model having surface parameters, a texture model having texture parameters, and a motion model having motion parameters of the sensed wheel region; calculating values for the surface parameters, the texture parameters, and the motion parameters using a variation computation as a function of the acquired images, in order to minimize a deviation of the three-dimensional surface model, texture model, and motion model from image data of the acquired images; and determining a rotation axis and/or a rotation center of the wheel as a function of the calculated values of the motion parameters.

Abstract: A chassis measuring system according to the invention includes at least one pair of first and second measuring heads (2, 21), which are situated diametrically opposed in the transverse vehicle direction, each measuring head (2, 21) having at least one measuring camera (4, 8; 14, 18) and an illumination device (6, 10; 16, 20) pointing in the same direction as the measuring camera (4, 8; 14, 18), as well as a data processing unit, which is connected to the measuring heads (2, 12) and designed in such a way that it determines the position parameters of the measuring heads (2, 12) relative to each other by comparing the image of the illumination device (16, 20) of the second measuring head (12) recorded by the measuring camera (4, 8) of the first measuring head (2) with stored reference images.

Abstract: A chassis measuring system comprises an illumination device for producing a structured illumination (38, 58, 78, 98), which is developed in such a way that it produces a structured image on a measuring head (32, 52; 72, 92) situated opposite in the transverse vehicle direction, a reference surface (40, 60, 80, 100) facing in the same direction as the illumination device (38, 58, 78, 98), on which a structured image produced by an illumination device (38, 58; 78, 98) of the measuring head (32, 52; 72, 92) situated opposite in the transverse vehicle direction may be projected, and at least one measuring camera (34, 36; 54, 56; 74, 76; 94, 96) facing in the same direction as the illumination device (38, 58, 78, 98), which is developed in such a way that it detects the structured image on the reference surface (40, 60; 80, 100) of the opposite measuring head (32, 52; 72, 92) in order to determine the position parameters of the measuring head (32, 52, 72, 92).

Abstract: A method for checking the referencing of at least two measuring heads of a contactless chassis measuring system includes: detecting at least one geometry detail of a vehicle using the measuring heads; determining an initial position of the geometry detail in the coordinate system associated with each measuring head; transforming the initial position into a shared coordinate system; executing a relative movement between the measuring heads and the vehicle; determining a final position of the at least one geometry detail in the coordinate system associated with each measuring head; transforming the final position of the geometry detail into the shared coordinate system; determining the movement vectors from the difference between the final position and the initial position of the at least one geometry detail; checking the movement vectors for coincidence.