Automated system for detection of local defects in the conductive coating with the use of a matrix of electrodes

The article deals with the problems of detecting surface defects of conductive coatings under a layer of thermal insulation, fuel tanks of rocket and space vehicles. The review of various methods of defect control, of which the method of capacitive flaw detection is considered in detail, as the most effective in the control of large areas. The original design of the device for detecting local defects in the conductive coating based on capacitance measurement using the electrode matrix, as well as using the inducing electrode, to increase the sensitivity and selectivity of the sensor is described. The algorithm of the automated system operation is described.