Experimental validation of the sensing capabilities of tunable interdigital transducer
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Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
Online publish date: 2017-12-18
Publish date: 2018-03-12
Submission date: 2017-02-28
Final revision date: 2017-10-23
Acceptance date: 2017-11-22
Diagnostyka 2018;19(1):49–56
Modern systems and methods of Structural Health Monitoring (SHM) and Non Destructive Testing (NDT) require new types of transducers. In this paper, a new type of Lamb Wave transducer, the Tunable Interdigital Transducer (T-IDT), developed at AGH University of Science and Technology, is presented and its sensing capabilities are discussed based on experimental tests. The properties of the proposed transducer are similar to those of a traditional Interdigital Transducer (IDT), except for its ability to change the wavelength to which the transducer is tuned without introducing any physical changes in the electrode layout. In the paper, three sets of experiments are presented. The first two determine the ability of the transducer to measure the distance of damage from the transducer. The last set of experiments investigates the angular sensitivity of the proposed transducer for modelled damage. The presented results are compared to ones obtained with a traditional IDT.
Michał Mańka   
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie, Al. Mickiewicza 30, 30-059 Kraków, Polska