APPARATUS AND METHOD FOR MEASURING TRANSFORMATION AMOUNT OF HIGH TEMPERATURE HOT-ROLLED STEEL PLATE

摘要

PURPOSE: An apparatus and method is provided to achieve improved accuracy of measurement by preventing errors caused due to the change of lift-off. CONSTITUTION: An apparatus comprises a flux measuring unit(30) including a flux generator(31) installed underneath a high temperature hot-rolled steel plate(11), and which generates magnetic flux by a static current, an alternating exciter(32) for supplying static current to the flux generator, and a voltage measuring device(33) for measuring, in a voltage value, the flux applied from the flux generator; a unit time input unit(40) for obtaining unit time by using the movement speed of the hot-rolled steel plate and the transformation amount of the distance between stands of a roller; a maximum voltage measuring unit(50) for measuring maximum voltage for voltages measured by the voltage measuring device, during the unit time obtained by the unit time input unit; and an arithmetic operation unit(60) for calculating transformation amount by using the maximum voltage measured by the maximum voltage measuring unit.