Low Color Difference Signals Of Color Printing Machine Automatic Register System To Obtain

This topic is carries on the optimized design to the existing offset press Automatic Register Control System, enhances to the low color difference signal recognition and the judgment, thus enhances the system the sensitivity and the precision.This research the photoelectric detection installment which uses by the present domestic and foreign commonly used Automatic Register Control System is the foundation, the basis photoelectric detection basic principle, the Complementary color technology principle, according to the material spectrum reflectance Curve, chooses the suitable complement color Light Source, enhances the reflection signal rate of change. According to the newest photoelectricity induction technology development, chooses the suitable part and the correlation electric circuit carries on the optimized design, thus strengthened the system to gain the low difference signal the ability.The test installation including the Light Source, the photoelectricity induction part and the related part three parts.The Light Source partial selections has the high luminance, the power loss slightly, the volume small, the performance stable, the service life long, the price is inexpensive and so on the merit light emitter diode takes the standard Light Source. According to the color code color difference, the selection and the color code become the complement color the Light Source, is different using the paper and the color code to the complement color Light Source index of reflection, but obtains has the obvious difference the reflection signal.Induces the partial selections dark current small, the noise low, the speed of response is quick, the photoelectricity characteristic linearity, is affected slightly the temperature, the performance steadily grades the characteristic the photodiode to accept as the photosensitivity part the reflected light. At the same time, the use different material photodiode is different to the different wave length spectral response scope, the selection corresponds to the Light Source photodiode, may reduce the partial outside light to the useful signal disturbance.The interlock circuit partially selected the triode transistor to actuate the electric circuit and the integration repeater circuit, simple, practical, and the performance was stable.