RESEARCH OF ATTENUATION OF ULTRASONIC WAVES AT THE NON-CONTACT CONTROL OF THICKNESS OF THE POLYMER COATING.

Purpose. Investigate the attenuation of ultrasonic waves for non-contact control of composite materials. Methodology. In this work non-contact ultrasonic method of control of thickness of the polymer coating of textile materials is used, this method considers the attenuation of ultrasonic waves. Findings. Attenuation of ultrasonic signal for most fabrics can be neglected in comparison with the attenuation in a polymer coating and that is proved. Results researches of influence of thickness of polymer coating and fabric on attenuation of ultrasonic signal are resulted. Originality. In article considered dependences of amplitudes of ultrasonic waves, one of them, that passing through the polymer coating, other of them, that passing through the fabric, and other waves, that reflecting from the polymer coating and from the fabric, with attenuation. Practical value. Optimal frequency of ultrasonic waves to decreasing attenuation of signal for non-contact control of thickness of the polymer coating was suggested. [ABSTRACT FROM AUTHOR]