| 摘要 |
PURPOSE:To make possible the accurate measurement of different plate thicknesses even at the continuous rolling and achieve the improvement in operating characteristic by providing plural X-ray detectors in the rolling line of a steel plate material and alternately performing the calibration thereof. CONSTITUTION:The plate thickness measurement signal from a detecting part 30a having entered the rolling line of a plate material 31 is converted in a measuring part 33a and is then sent out to a recorder are braking part via control part 34. On the other hand, the detecting part 30b having retreated to the outside of the line is subjected to calibration to different plate thicknesses and is entered into the line before said plate material is conveyed into the line. At the conveying-in of the next plate material, the detecting part 30a is retreated and the measurement by the detecting part 30b is accomplished, while the detecting part 30a having retreated is subjected to the calibration to the thickness of the next plate material. By performing the repetition of such operation, the continuous measurement may be accurately performed. |
