公开(公告)号：US08875407B2

公开(公告)日：2014-11-04

申请号：US13781977

申请日：2013-03-01

Applicant: Hunter Engineering Company

Inventor： Michael T. Stieff ,  Daniel R. Dorrance ,  Thomas J. Golab ,  Mark S. Shylanski

IPC: G01B11/275

CPC classification number: H04N7/18 ,  B60R11/04 ,  G01B11/275 ,  G01B11/2755 ,  G01B2210/12 ,  G01B2210/14 ,  G01B2210/30

Abstract: A machine vision vehicle wheel alignment system for acquiring measurements associated with a vehicle. The system includes at least one imaging sensor having a field of view and at least one optical target secured to a wheel assembly on a vehicle within the field of view of the imaging sensor. The optical target includes a plurality of visible target elements disposed on at least two surfaces in a determinable geometric and spatial configuration which are calibrated prior to use. A processing unit in the system is configured to receive at least two sets of image data from the imaging sensor, with each set of image data acquired at a different rotational position of the wheel assembly around an axis of rotation and representative of at least one visible target element on each of the two surfaces, from which the processing unit is configured to identify said axis of rotation of the wheel assembly.

Abstract translation: 一种用于获取与车辆相关联的测量的机器视觉车轮对准系统。 该系统包括至少一个具有视野的成像传感器和在成像传感器的视场内固定到车辆上的车轮组件的至少一个光学目标。 光学目标包括以可确定的几何和空间配置布置在至少两个表面上的多个可见目标元件，其在使用之前被校准。 系统中的处理单元被配置为从成像传感器接收至少两组图像数据，其中每组图像数据在轮组件的不同旋转位置周围围绕旋转轴线获取，并且代表至少一个可见光 目标元件在两个表面中的每一个上，处理单元从该目标元件构造成识别车轮组件的所述旋转轴线。

公开(公告)号：US20140267699A1

公开(公告)日：2014-09-18

申请号：US14209552

申请日：2014-03-13

Applicant: Hunter Engineering Company

Inventor： Daniel R. Dorrance ,  Mark S. Shylanski

IPC: G06T7/00 ,  G06T7/20 ,  G06K9/60

CPC classification number: G06K9/60 ,  G01B11/2755 ,  G01B2210/20 ,  G01B2210/286 ,  G06T7/73 ,  G06T2200/04 ,  G06T2207/10016 ,  G06T2207/10028 ,  G06T2207/20221

Abstract: 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.

Abstract translation: 一种用于在车轮组件在投影图案内移动的情况下通过获取图像序列来非车载车轮组件的非接触式测量的方法。 获取并处理车轮组件的图像，以便例如通过识别轮缘边缘来识别对应于车轮组件的图像的部分。 裁剪每个图像的识别部分，并通过优化程序旋转对齐数据的结果点云，以消除每个图像之间的轮平移和旋转的影响，以及识别每个图像的旋转中心和旋转量 这产生最佳匹配结果。 叠加产生的点云会在轮组件的最佳配合表面上产生具有高密度数据点的生成图像，可用于进一步细化旋转轴确定。

公开(公告)号：US20130250098A1

公开(公告)日：2013-09-26

申请号：US13693750

申请日：2012-12-04

Applicant: HUNTER ENGINEERING COMPANY

Inventor： Michael T. Stieff ,  Dennis M. Linson ,  Daniel R. Dorrance ,  Thomas J. Golab ,  Mark S. Shylanski

IPC: G01B11/275

CPC classification number: G01B11/275 ,  G01B11/2755 ,  G01B2210/14 ,  G01B2210/30

Abstract: A method and apparatus for determining the alignment of a vehicle wheel using an optical target assembly secured to the vehicle wheel in a non-determined position, the optical target assembly having a dimensionally stable shape and a plurality of optical target elements disposed on a plurality of target surfaces. Images of the optical target elements are acquired by an imaging system, together with target identifying indicia, and utilized together with previously stored target characterization data to determine a spatial orientation of the optical target assembly and an alignment of the vehicle wheel onto which it is secured.

Abstract translation: 一种用于使用在未确定位置固定到车辆车轮的光学目标组件来确定车轮的对准的方法和装置，具有尺寸稳定形状的光学目标组件和设置在多个 目标表面。 光学目标元件的图像由成像系统与目标识别标记一起获取，并与先前存储的目标表征数据一起使用以确定光学目标组件的空间取向以及其上固定的车轮的对准 。