| 摘要 |
<p>PURPOSE:To obtain the accurate plate thickness, by substituting the value of mass absorption coefficient (mum) of a material, determined by correction basing on the plate thickness estimated or measured by a rolling schedule or a permeated radiation dose, etc., into a theoretical formula. CONSTITUTION:The estimated plate thickness is obtained by a rolling schedule or a gauge-meter system, etc. Further, a permeated radiation dose obtained by a permeated radiation-dose detector 12 is substituted into a theoretical formula to measure the plate thickness. Then a mum value is determined by correction from said estimated or measured plate thickness. Next, the determined mum value is substituted into a theoretical formula, used for obtaining the plate thickness from a permeated radiation dose, to obtain the accurate plate thickness. Thus, an automatic plate-thickness controlling device is accurately controlled.</p> |
