| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.27 ( November 1992 ) Hot-Rolled, Cold-Rolled and Surface Coated Steel Sheets and Electronics and Instrumentation ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Automatic Thickness Measuring System by Image Processing for Brake Shoes of Traveling Rolling Stock Hitoshi Sato, Hisao Nishii, Shigetoshi Adachi |
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Synopsis : An automatic system for measuring the thickness of brake shoes on moving rolling stock was developed using a unique image processing technique. Initially, more than 80 brake shoes on a series of moving cars were photographed stroboscopically as reference (memory) images. The positions of the shoes were then extracted and the remaining thickness of the shoes was automatically measured across a 60-mm width a resolution of 1 mm and an accuracy of }3 mm. This information was incorporated in the system database. The system makes it possible to estimate the interval between shoe changes and contributes to more efficient inspection and expendable control. A unique algorithm was developed for the system, permitting the extraction of shoe images regardless of their position within the picture and reconstruction of the outline of the shoe, which may be obscured by dirt. A multi-purpose image processor, Dr. IMAGE, which was also developed by Kawasaki Steel, plays an important part in the labor saving automatic system. |
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