| 摘要 |
<P>PROBLEM TO BE SOLVED: To evaluate a dust cleaning effect simply, instantly, quantitatively and precisely when an in-duct contamination is diagnosed. <P>SOLUTION: An adhesive tape 2 is pasted on a prescribed position at the inside of a duct 1, stuck particles 3, 3, etc., and so on deposited at the inside of the duct are transferred to the adhesive tape 2, the adhesive tape 2 is photographed by a microscope, a photographed image is fetched by a computer 8, the photographed image is binarization-processed by the computer 8, a projection area of the stuck particles is divided by an area of the whole photographed image so as to find an area rate of the stuck particles, and a contamination degree inside the duct is decided on the basis of the area rate of the stuck particles. <P>COPYRIGHT: (C)2004,JPO |
