INTERDIGITAL TRANSDUCERS FOR LAMB-WAVE BASED SHM SYSTEMS: DESIGN AND SENSITIVITY ANALYSIS

Authors

  • Michał Mańka AGH University of Science and Technology
  • Mateusz Rosiek AGH University of Science and Technology
  • Adam Martowicz AGH University of Science and Technology
  • Tadeusz Uhl AGH University of Science and Technology

Keywords:

Lamb waves, System Health Monitoring, transducer, interdigital transducer

Abstract

Structural health monitoring (SHM) systems have been constantly improved in the past decades. Sensors for SHM should be built-in to perform continuous measurements in opposite to non-destructive testing (NDT), in case of which sensors have to be mounted on the structure only during measurements. One of the most promising type of the transducers dedicated for SHM systems is Interdigital Transducer (IDT), which is designed for ultrasonic Lamb wave monitoring. Mode selectivity, high excitation strength, wave directivity, small size and relatively low cost are the most important advantages of the IDT.

In the paper a designing process of the IDT is presented. Then, the results of numerical simulations and sensitivity analysis are discussed for exemplary IDT configuration.

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References

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Published

2011-06-26

Issue

Vol. 30 No. 2 (2011)

Section

Articles

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