Fromme, P;
Loveday, PW;
(2024)
Guided ultrasonic wave measurement in plates using low-cost equipment.
In: Su, Zhongqing and Peters, Kara J and Ricci, Fabrizio and Rizzo, Piervincenzo, (eds.)
Proceedings Volume 12951:Health Monitoring of Structural and Biological Systems XVIII.
(pp. p. 1295108).
SPIE: Bellingham, WA, USA.
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Abstract
Guided waves can propagate along thin-walled structures, such as pipes and plates, with limited energy loss, thus enabling the efficient inspection and monitoring of large structures from a limited number of sensor locations. This allows Structural Health Monitoring (SHM) using permanently installed monitoring systems with limited access and sensor requirements. However, guided wave propagation is complicated due to multiple propagating wave modes and dispersion, potentially causing the signals to become distorted. Both analytical and numerical analysis and experimental measurements are essential for guided wave research. Specialized laboratory equipment such as non-contact laser vibrometers can be expensive and unaffordable. This contribution presents a preliminary investigation on what can be achieved experimentally using low-cost sensors, suitable for research and teaching in circumstances with limited budgets. For low frequency guided wave propagation in an isotropic plate (A0 Lamb wave mode), the influence of different measurement configurations on the accuracy of group velocity quantification was investigated. Results from experimental setups employing different receive transducers were evaluated and quantified. Accuracy of sensor placement and coupling as well as measurement repeatability and Signal-to-Noise Ratio (SNR) were investigated. Accurate experimental quantification of the group velocity, using the different movable sensors, was demonstrated by comparison to theoretical predictions based on the nominal aluminum material properties.
| Type: | Proceedings paper |
|---|---|
| Title: | Guided ultrasonic wave measurement in plates using low-cost equipment |
| Event: | SPIE Smart Structures + Nondestructive Evaluation 2024 |
| Dates: | 25 Mar 2024 - 29 Mar 2024 |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1117/12.3011626 |
| Publisher version: | http://dx.doi.org/10.1117/12.3011626 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Transducers; Wave propagation; Waveguides; Ultrasonics; Ultrasound transducers; Signal to noise ratio; Velocity measurements |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10193310 |
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