| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of measuring nonmetallic inclusions in aluminum or the like which conducts measurement easily, accurately, and in real time on the spot, and to provide a measurement apparatus used for the same. SOLUTION: The measurement apparatus for measuring nonmetallic inclusions in aluminum or the like 1 comprises a table T which places a sample S, such as aluminum, having a fracture surface S with the fracture surface S pointing upward, a reflection dome D which is positioned above the table T and has a downward-pointing concave reflection surface 2 having a nearly semicircular cross-section, a light-emitting diode (a light source) 4 which is positioned along the inner rim of the concave reflection surface 2 of the reflection dome D, a CCD camera (an imaging means) 10 which is positioned above an opening 6 opened in the vicinity of the top of the reflection dome D, and a computer (a calculation means) 14 which performs color contrast processing on an image captured by the camera 10 and performs binarization processing using a predetermined threshold or the like. COPYRIGHT: (C)2005,JPO&NCIPI
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