| 摘要 |
PURPOSE:To enable real-time measurement of a sectional area or volume of a workpiece in conveyance by CPU of a personal computer level, by computing a sectional area between a contour perceived by a scanning means and a belt conveyor. CONSTITUTION:A lamp 15 and a video camera 4 are provided in a housing 14 inside a case 13. The lamp 15 applies an illumination light 2 onto a workpiece 1 such as earth or sand conveyed on a belt conveyor 16 and the contour 3 thereof is taken in by the camera 4. Receiving an image signal from the camera 4, a measuring control mechanism 12 using a microcomputer executes a measuring control. In other words, only a video signal is separated from a composite video signal from the camera 4 by a video separation circuit and the contour 3 is determined by a contour level determination circuit. A contour in a screen containing the contour 3 of the workpiece 1 is scanned in the vertical direction and a sectional area between this contour 3 and the conveyor 16 is computed. |
