Construction of ARD Diagrams for Separately Combined Piezoelectric Converters

Based on the analysis of existing works, it is proved that there is no methodology for constructing “amplitude-distance – diameter” diagrams (ARD diagrams) for separately combined piezoelectric converters (RS-PEP), although the regulatory documentation for the production of such converters requires completing these converters with ARD diagrams. In practical diagnostics, the use of these diagrams simplifi es the confi guration of equipment, reduces the cost of manufacturing tuning samples, thereby proving the relevance of this work. Based on existing work, a model has been proposed that allows us to calculate echo signals from disk refl ectors and refl ectors in the form of a plane, which made it possible to construct an ARD diagram for PC PEP for different diameters of disk refl ectors located at different depths. The developed calculation model allows taking into account the geometric and acoustic characteristics of the PC PEP, which makes it universal. An experimental verifi cation of the obtained calculated data of the ARD diagram was carried out, which confi rmed the correctness of the approaches to modeling the propagation of a longitudinal wave, its refl ection from disk and planar refl ectors in relation to separately combined piezoelectric transducers. Measures are proposed to reduce the effect of the attenuation difference between the material of the object of control and the material of manufacture of CO-2 (an echo refl ector in the form of a plane used to obtain a reference signal).