Inventors:
Joshua J. Hackney - Wayzata MN
John Ma - Burnsville MN
Arye Malek - Edina MN
Matthew M. McPherson - Minneapolis MN
Xin Shi - Mound MN
Assignee:
PPT Vision, Inc. - Eden Prairie MN
International Classification:
G01B 1124
Abstract:
In the context of a machine-vision system for inspecting a part, a method and apparatus to provide high-speed 3D (three-dimensional) inspection of manufactured parts. Parts are inspected to obtain dimensional and geometric information regarding such characteristics as sag or bow of subportions of the item, the angle of pitch, yaw, and or roll of one portion relative to another, heights of various formations on the part. In some embodiments, an array of height pixels is calculated, and regions of interest (ROIs) are located within the array, and the ROIs are used to determine characteristic geometries of the parts being measured. One measurement system includes a light source, an imager, and a computer. Light source provides projected patterned light on the object useful to obtain 3D geometric information about the object. The imager has a reception optical axis that intersects the object when the machine-vision system is in operation.
