Research of frequency and amplitude-frequency characteristics of industrial ultrasound transducers for non-destructive quality control of materials

Abstract

Ultrasonic pulse method is one of the effective methods of nondestructive quality control of materials. It is used to study a wide range of materials, when inspecting buildings and structures. Its use makes it possible to determine the physical and mechanical characteristics, the structure of materials, the presence of foreign inclusions. When this method is used to study the materials of the porous structure, and also when measuring the characteristics of the ultrasonic signal at considerable distances between the radiating and receiving ultrasonic transducers, a significant attenuation of the amplitude of the information signal is observed. In this case, its amplitude is often at the noise level. This can cause a decrease in the accuracy of the results. One of the directions of providing the necessary levels of accuracy, reliability of the measurement data is the use of the frequency characteristics of the receiving and transmitting path of the monitoring and measuring devices. One of the elements of this path is ultrasonic transducers. The article presents research of frequency and amplitude-frequency industrial ultrasonic transducers made of lead zirconate titanate with specified nominal frequencies of 60, 100 and 150 kHz. Based on the analysis of the research results, conclusions were drawn and recommendations developed aimed at solving the problem of increasing the accuracy, reliability and validity of the measurement results. The solution of this problem will ensure an increase in the accuracy of the control of the quality characteristics of the materials under study ‒ their structure, physical and mechanical characteristics. This research can be used to improve the control and measuring equipment by which this method of non-destructive control is realized.