ABOUT DETERMINING DURATION AND AMPLITUDE OF A PROBING PULSE AT THE OUTPUT OF THE PIEZOELECTRIC TRANSDUCER, IN ACCORDANCE WITH ITS CONSTRUCTIVE FEATURES

Considers a plate-shaped piezoelectric transducer, loaded through the system of transition layers to a solid medium. The presence of transitional layers is due to the need to create an acoustic contact between the object of control and the transducer (layer 1), the use of a protector (layer 2), and the presence of an adhesive bond between the radiating plate surface and the protector (layer 3). The back side of the plate is in contact with the damper. Based on the technique proposed in the previous work of the authors, an algorithm for calculating the frequency response of the transducer is described. The pulsed mode of operation of the radiator is investigated. It was assumed that the active element is excited by a voltage pulse in the form of one half-cycle of the sinusoide at the anti-resonance frequency of the plate. Estimated calculations of the thickness of the layers for a specific working frequency of the transducer are carried out. Based on this, calculations are made for a set of wave thicknesses of layers actually encountered in the practice of ultrasonic testing. Calculations are carried out in a wide range of values of the specific acoustic impedance of the protector.

Authors: R. S. Konovalov, S. I. Konovalov, A. G. Kuz’menko

Direction: Instrument Engineering and Information-Measurement Technologies

Keywords: Piezoelectric plate, system of transition layers, protector, frequency response, pulse mode

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