X-ray digital image correlation
| DWPI Title: Method of X-ray digital image correlation involves aligning X-ray imaging system at target area, determining intrinsic and extrinsic stereoscopic imaging parameters, placing specimen in target area, preprocessing stereoscopic X-ray images, and determining kinematic quantities of specimen |
| Abstract: A method of X-ray digital image correlation is provided. The method comprises aligning cameras of an X-ray imaging system, wherein the X-ray imaging system comprises two X-ray sources pointed at a target area at a stereo angle and two corresponding X-ray detectors behind the target area. The X-ray imaging system is tuned to determine power levels of the X-ray sources that maximize image contrast and signal-to-noise ratio. The system is calibrated to determine intrinsic and extrinsic stereoscopic imaging parameters. A specimen with a random contrast pattern comprising an X-ray attenuating material is placed in the target area. Stereoscopic X-ray images are taken of the specimen and processed according to the power levels of the X-ray sources to maximize image contrast and signal-to-noise ratio and remove background objects. Kinematic quantities are determined according to changes in the contrast pattern over a number of successive images. |
| Use: Method of X-ray digital image correlation. |
| Advantage: The method can process stereoscopic X-ray images according to power levels of the X-ray sources to maximize image contrast and signal-to-noise ratio and remove background articles, and determine kinematic quantities according to changes in the contrast pattern over a number of successive images. |
| Novelty: Method of X-ray digital image correlation involves aligning cameras of an X-ray imaging system, where the X-ray imaging system comprises two X-ray sources pointed at a target area at a stereo angle and two corresponding X-ray detectors behind the target area and the cameras form portion of the X-ray detectors, tuning the X-ray imaging system to determine power levels of the X-ray sources which maximize image contrast and signal-to-noise ratio, calibrating the X-ray imaging system to determine intrinsic and extrinsic stereoscopic imaging parameters of the X-ray imaging system, placing a specimen in the target area after calibrating the X-ray imaging system, preprocessing the stereoscopic X-ray images to maximize image contrast and signal-to-noise ratio and remove background articles by a computer system, and determining kinematic quantities of the specimen according to changes in random contrast pattern deposited on the specimen, by computer system. |
| Filed: 2/8/2022 |
| Application Number: US17666723A |
| Tech ID: SD 15543.0 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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