Method of measurement of number of nonmetallic inclusions and casting mold for obtaining cast sample used for same
US8155430B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 7, 2008 |
| Grant date | Apr 10, 2012 |
| Priority date | — |
| Expiry date | Nov 3, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/2022
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of automatically counting a number of inclusions by eliminating the effects of shrinkage cavities in the conventional method and securing a high correlation with a value measured by a skilled worker and a casting mold for obtaining a cast sample used for the same are provided. A method of measurement of a number of nonmetallic inclusions comprising capturing an image of a rectangular fracture surface of a cast sample consisting of an aluminum alloy by a CCD camera or other image capturing means, processing the image captured by the image capturing means for color density, digitalizing the processed image by a predetermined threshold value, and counting the number of pixel clusters of a predetermined size or more, the method characterized by detecting the end edges of the short sides of the rectangular fracture surface before the capturing of its image and automatically setting measurement regions of an area of ¼ to ⅔ of the area of the fracture surface at the two ends of the fracture surface. A casting mold for obtaining a cast sample comprised of a top mold having a recess and a bottom mold having a sprue, having a substantially rectangular parallelepiped cavity extending…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.