Method and apparatus for determining the straightness of...

Details Method and apparatus for determining the straightness of... Method and apparatus for determining the straightness of...

2006-09-19

2006-09-19

Nghiem, Michael (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system

Dimensional determination

Reexamination Certificate

active

07110910

ABSTRACT:
A method and apparatus for automating the measurement of straightness of linear stock material produced by the operation of a mill. As the linear stock material exits from the mill, sensors acquire a sequence of image or distance measurement pairs associated with the material at discrete longitudinal points over a segment of the material. A processing system utilizes the data pairs to determine a set of centroids for a segment of the material. A virtual axis is identified between centroids associated with the segment, and the processing system determines a measure of deviation of each remaining centroid in a segment from the virtual axis to identify a degree of concavity of the material within the segment, as well as to identify a measure of the angular orientation of the concavity about the virtual axis.

REFERENCES:
patent: 5157734 (1992-10-01), Chen et al.
patent: 5408318 (1995-04-01), Slater

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