Study of the pulsed operating mode of the piezoelectric transducer of an immersion flaw detector

Purpose of the work: To evaluate the influence of the shape of a complex electrical signal at the input of a piezoelectric transducer on the duration of the acoustic signal emitted by it. Materials and methods: Theoretical modeling using the d'Alembert method for a one-sided loaded piezoelectric plate was used. Results: The dynamics of changes in the probing signal depending on the moment of supply of a correctly formed compensating half-cycle has been studied. A comparison was made of the shapes of the probing signals for the cases of the presence and absence of a damper on the back side of the plate. The possibility of obtaining signals of various durations is shown. It has been established that when a complex electrical signal is applied to the piezoelectric element of a damped probe, a probing signal is generated with a higher level of oscillations (with incomplete compensation) than for an undamped transducer. Conclusion: A plate-type piezoelectric transducer is considered, designed to emit short probing signals, which is achieved by exciting it with electrical signals of complex shapes. The problem was solved by the d'Alembert method for a one-sided loaded piezoelectric plate. The aquatic environment was chosen as the acoustic load. The plate is considered in two versions – with and without a damper.

Authors: S. I. Konovalov, R. S. Konovalov, V. M. Tsaplev, D. I. Polosukhina

Direction: Physics

Keywords: piezoelectric transducer, damper, electrical compensation, pulse mode, d'Alembert method.

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