METHOD FOR MEASURING A CHASSIS AND DEVICE FOR MEASURING THE CHASSIS GEOMETRY OF A MOTOR VEHICLE

摘要

The method according to the invention for measuring a chassis comprises the steps of providing a chassis measuring system having four measuring heads (2, 4, 14, 16) arranged in known positions relative to each other, each of which has a monocular imaging device (22, 24, 26, 28), wherein the relative position of the measuring heads (2, 4, 14, 16) to each other is known, and wherein the distance (dVA) of the front measuring heads (2, 4) to each other differs from the distance (dHA) of the rear measuring heads (14, 16) to each other; capturing a front wheel (6, 8) or a measuring target arranged thereon in at least one first positioning location of the vehicle (1) by way of the rear measuring heads (14, 16); capturing the four wheels (6, 8, 10, 12) or the measuring targets arranged thereon by way of each of the four measuring heads (2, 4, 14, 16) in a first main measuring position and in a second main measuring position of the vehicle (1); carrying out local 3D reconstructions for determining the translation vectors (t1, t2, t3, t4), the rotation vectors (R1, R2, R3, R4) and the rotational angles of the wheel among said positions and the wheel rotational centers and the wheel rotational axes of the wheels (6, 8, 10, 12) from the captured images of the wheels (6, 8, 10, 12) or the measuring targets attached thereon; adapting the local scales to a common, global scale by the driving movement; transmitting the global scale from the main measurement to the positioning measurement; determining an absolute scale for the measuring heads (2, 4, 14, 16) from the measurements of the front wheels (6, 8) or of the measuring targets attached thereon in the positioning locations and in the main measuring positions; determining the measuring parameters of the chassis of the vehicle (1), particularly camber, individual and/or total track.