Double sheet detection method and apparatus of sheet-fed rotary press.

摘要

Double sheet detection method and apparatus of a sheet-fed rotary press, wherein a theoretical reference value (Mn) is set as an intermediate value between a first theoretical amount of light transmitted through one sheet (Line A) and a second theroretical amount of light transmitted through two sheets (Line B), respectively; the theoretical reference value is subtracted from the first amount of light to obtain a theoretical subtracted value (Ln); the theoretical subtracted value (Ln) is subracted from an actual amount of light transmitted through one sheet to obtain an actual reference value; and an actual amount of light transmitted through a current sheet is compared with the actual reference value to perform double sheet detection.