Method for Determining Parameters of a Rotating Object within a Projected Pattern

摘要

A method for contactless measurements of a vehicle wheel assembly by acquiring a sequence of images as the vehicle wheel assembly moves within a projected pattern of light. Images of the vehicle wheel assembly are acquired and processed to identify the portions of the images corresponding to the wheel assembly, such as by recognition of the wheel rim edge. The identified portion of each image is cropped and a resulting point cloud of data rotational aligned by an optimization procedure to remove the effect of wheel translation and rotation between each image, as well as to identify a center of rotation and amount of rotation for each image which yields a best-fit result. Superimposing the resulting point clouds produces a generated image with a high density of data points on the optimally fit surfaces of the wheel assembly, which can be used to further refine the axis of rotation determination.

主权项

1. A method for contactless measurements of a vehicle wheel assembly, comprising:
projecting a pattern of light into a field of view; acquiring a sequence of images as the vehicle wheel assembly either rotates, or rotates and translates, through said projected pattern of light; processing said acquired sequence of images to identify a point cloud of data points for at least a portion of each of the images corresponding to surfaces of the vehicle wheel assembly; optimizing at least one pair of point clouds associated with the acquired images to compensate for an effect of wheel rotation, and if said wheel is translating, for an effect of wheel translation, between each acquired image; and identifying an axis of rotation for the vehicle wheel assembly utilizing each pair of optimized point clouds.