MEASURING DEVICE FOR STRAIGHTNESS OF STEEL MATERIAL STRIP BETWEEN RUNS

摘要

PURPOSE:To measure the straightness of a steel material strip between runs in a short time with high precision by providing an arithmetic processor which inputs a signal from a detecting means for the movement speed of a long-sized metallic material and a distance detection signal for the distance to a side surface of the long-sized metallic material from a distance detecting means and calculates the curvature extent of the long-sized metallic material. CONSTITUTION:When a rail material runs on a conveyance table 10 from the right, the amounts of displacement detected by respective capacity type sensors 1-3 are amplified by amplifiers 4-6, which supply DC voltages proportional to the amounts of displacements to a signal processor 9. The signal processor 9 also inputs the movement speeds of the rail material detected by speed detectors 7 and 8 as line speeds. The signal process 9 reads the respective signals by an A/D converter to calculate the straightness to the overall length of the rail by a model. The result of the calculation is displayed and recorded on a display recorder 10. A checker decides on whether the rail material is within a permissible range or not by the result.