Patent ID: 11867668
Assignee: ILLINOIS TOOL WORKS INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 18:
19. A system for correcting for a variable thickness of a test specimen comprising a processing system configured to:
receive images from an imaging device of a test specimen during a testing process, wherein the imaging device is arranged opposite a reflective screen relative to the test specimen;
determine a calibration distance between the imaging device and a calibration plane associated with the testing system;
receive a thickness of a test specimen, the thickness corresponding to a distance between first and second surfaces of the test specimen, wherein the test specimen is arranged such that the first surface is a first distance from the imaging device and the second surface being a second distance from the imaging device;
calculate a correction factor based in part on the calibration distance and a correction distance equivalent to a difference between a measurement plane and the calibration plane, wherein the correction distance is equivalent to one half of the thickness;
image one or more of a marking on the first surface of the test specimen or a silhouette of the test specimen to measure one or more characteristics of the test specimen, wherein the first surface of the testing specimen corresponds to the measurement plane, the measurement plane being offset from the calibration plane by a measurement distance; and
generate one or more corrected characteristics by applying a correction factor to the measurements of the one or more characteristics of the test specimen.