Scientists have developed a non-contact method of internal voltage control in polymer composites, making it possible to assess the degree of internal damage during the operation of aircraft parts. The method uses amorphous soft magnetic circuits to assess the stress state in composite materials. Wires are laid between the carbon fiber layers, forming a stress-sensitive grid.

Measurements can be carried out without contact or a connection to the sensing element. Only one sensor is used, unlike some methods of flaw detection that require sensors on both sides of the equipment.