3-D measurement of cutting tool wear

Details 3-D measurement of cutting tool wear 3-D measurement of cutting tool wear

1992-01-10

1994-11-01

Moore, David K.

Image analysis

Histogram processing

For setting a threshold

382 26, 348131, 356358, 36447412, 36455102, G06K 900, G01B 1102, G06F 1546, G06G 764

Patent

active

053613082

ABSTRACT:
The profile of a tool or other object having a flat reference plane is illuminated by interfering beams of coherent light to generate a striped light pattern which at any point deviates from straight lines as a function of the surface spacing from the reference plane. A camera image of the pattern taken at an angle to the beams is processed by an image analysis program which converts the stripes to lines corresponding to light peaks and valleys of the pattern. Tool wear or object profile is determined from the deviation of lines from straight reference lines. The program includes algorithms for identifying peak and valley line segments, determining the segments which are neighbors of other segments, and connecting lines according to a set of rules and constraints which use the data on neighbor segments and the proximity of segment end points.

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