2025 SMSI Bannerklein

A9.1 Excitation of Guided Acoustic Waves Using Ignition Sparks

Event
SMSI 2021
2021-05-03 - 2021-05-06
digital
Band
SMSI 2021 - Sensors and Instrumentation
Chapter
A9 Ultrasonic and Acoustic Measurements
Author(s)
S. Krempel, A. Backer, F. Dötzer, K. Drese - Coburg University of Applied Sciences and Arts, Coburg (Germany)
Pages
97 - 98
DOI
10.5162/SMSI2021/A9.1
ISBN
978-3-9819376-4-0
Price
free

Abstract

Many sensor principles are based on the excitation and detection of guided acoustic waves (GAW). These are usually generated by mechanical coupling of piezoceramic transducers with the help of thin coupling layers. With electromechanical transducers (EMAT) or pulsed lasers, GAW can also be excited without a coupling layer or direct coupling. A further, very cost-effective possibility to excite Lamb waves on thin sheets without direct contact is shown here in the experimental setup by means of electric
sparks.

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