| 摘要 |
PURPOSE:To monitor always under stabilized conditions by stopping molding halfway automatically when brightness is varied much, and modifying binary coded level basing on the comparison of the darkest luminance when brightness is varied a little. CONSTITUTION:The darkest luminance level in the whole picture elements of a printed image of a mold, sensed by a CCD camera 10, is sensed by a control circuit 14, and when the same is out of the tolerance limits of the level preset by a level-upper limit setting device 20 for the darkest luminance and a level lower-limit setting device 22 for the darkest luminance, an instruction is issued to a molder controller 46 to stop injection molding. When the darkest luminance level is within the tolerance limits, the level difference value between said darkest luminance and the darkest luminance level in the hole picture elements of the normal printed image stored in a reference memory 18a beforehand is operated, the binary coded luminance level preset in a binary coded level setting device 36 is modified and the sensed printed image is binary coded by a binary coded difference sensing circuit 30. |
