Open AccessUltrasonic modulated waves for diagnostics of concrete elements in bending
Author(s) -
Błażej Meronk,
Krzysztof Wilde
Publication year - 2014
Publication title -
budownictwo i architektura
Language(s) - English
Resource type - Journals
eISSN - 1899-0665
pISSN - 2544-3275
DOI - 10.35784/bud-arch.1906
Subject(s) - ultrasonic sensor , acoustics , actuator , harmonic , materials science , low frequency , bending , modulation (music) , ultrasonic testing , nonlinear system , engineering , physics , electrical engineering , composite material , telecommunications , quantum mechanics
The paper presents the experimental study on the diagnostics of concrete elements with the use of nonlinear acoustic effects. The tests were conducted on a concrete plate subjected to ultrasonic waves modulated with and without an additional low frequency actuator. The experimental results showed that the new method based on the direct modulation of diagnostic ultrasonic waves also provided sub-harmonic frequencies that indicated the presence of damage. The new method does not require a low frequency actuator for generation of low frequency oscillations, and therefore, is more suitable for practical application.