METHOD FOR CONTROLLING DRYING OF CERAMIC PRODUCTS Russian patent published in 2021 - IPC C04B33/30 F26B3/26 F26B21/06 

FIELD: controlling.

SUBSTANCE: invention relates to the field of technology related to burning of natural materials and products made therefrom, and can be used in production of building materials, in particular, ceramic bricks. The method for controlling drying of ceramic products involves determining the speed and temperature of the heat carrier, determining the location of trolleys with ceramic products in the drying furnace, identifying defects in the products, and transmitting the data about trolleys with defective products to a computer for subsequent monitoring of the movement of such trolleys in the drying furnace. When defects are detected in the products, the speed and/or temperature of the heat carrier in the drying furnace therein is changed, and the identified defects in the products are continuously monitored. The position of the trolleys with ceramic products is therein determined using a rangefinder laser installed at the entrance or exit of the trolleys into the tunnel. Defects in the ceramic products, e.g., in bricks, are identified by continuous dynamic monitoring of the temperature field of the surface of one or several ceramic products, for the purpose whereof a thermal imager is installed to the trolley above said surface, used to obtain an image of the temperature field of said surface. The digitised signal of the resulting image is transmitted from the output of the thermal imager antenna to the antenna of the router through which said signal is received by the computer wherein the signal is processed. During processing, the resulting image is divided into fragments of predetermined sizes. For each fragment, a histogram of the distribution of temperature gradient vectors at all points of the fragment is built. The resulting histogram is supplied to the input of a pre-trained neural network used to analyse each fragment, compare with the histograms of fragments of previous frames, and based on the results of the comparison, determine the average surface temperature of the product at each position of the trolley, the temperature difference between the positions, and identify the defects depending on the brick drying modes. The identified defects and the temperature difference between the positions are therein automatically continuously monitored in the following drying process. In case of an unacceptable temperature difference between the positions of the trolleys or a dynamic change in the identified defects, the neural network, based on the knowledge base thereof, develops recommendations for the operator, who, in accordance with the supplied recommendations, changes the drying modes - humidity and temperature - until the unacceptable temperature difference or growth of the identified defects is stopped. The speed, temperature and humidity of the heat carrier are then maintained in the mode established after stopping the unacceptable temperature difference, appearance or growth of defects.

EFFECT: reduction in the amount of defects of ceramic products caused by drying, reduction in the time of drying.

1 cl, 2 ex, 8 dwg