METHOD FOR CONTROLLING A PLATE SURFACE CLEANING BY DYNAMIC OPTICAL CONTROL, AND IMPLEMENTING EQUIPMENT

摘要

The invention concerns a method for controlling the cleaning of a plate (10) by dynamic optical control of its state, the plate having a thickness limited by the surface to be cleaned (10b) and an inner surface (10), whereby at least a modulated light flux is emitted by a source (1) through the plate thickness and reflected by the surface to be cleaned (10b). The reflected modulated light intensity is measured in several elementary sites in the form of amplitude levels of signal successively transmitted through a recording channel (2), the levels of each channel being cumulated during a sampling cycle determined by multiplexing (3) and synchronous analysis (4), and the value of the running counts are stored in a microcontroller (5). The method is characterised in that the running counts of current values are compared in the microcontroller for each channel by reference with current values, stored values and floating values, for performing short-term comparisons and in the longer term, a cleaning mode, adapted to the number of channels for which the comparisons exceed predetermined thresholds, being triggered.