| 摘要 |
PURPOSE:To make possible to measure the widths of aluminum plates, etc., noncontactly and continuously at high speeds and high accuracy by correcting plate width data obtained by receiving reflected light from edges with CCD cameras for a height measured by means of the reflection of laser beams. CONSTITUTION:By disposing light sources above, on the sides of, or under a metal plate 1, an object to be measured, reflected light from both edges 4 and 5 of the metal plate 1 or transmitted light is received with plural CCD cameras 6 and 7 installed above the plate. By detecting the addresses of the edges in detection signals by image sensors 12 and 13 in the cameras 6 and 7, plate width data are determined. From an obliquely upper point, laser light 9 formed into a linear beam via a cylindrical lens is projected to the upper surface of the metal plate 1, and by measuring the height of the upper surface of the metal plate 1 from the address of detection signals received by a CCD camera 11 installed obliquely above on the opposite side, height correction is added to said plate width data and the true value of plate width W0 is obtained. |
