| Title |
Application of Deconvolution technique for ultrasonic Lamb wave signals / |
| Authors |
Asokkumar, Aadhik ; Raisutis, Renaldas |
| Full Text |
|
| Is Part of |
International ultrasonic testing conference 2021 (UT-online 2021) "Novel methods and applications in ultrasonic testing": 1-30 November 2021: UT-online 2021 preface & abstract book.. Bad Breisig : NDT.net. 2021, p. 12 |
| Keywords [eng] |
Ultrasonic testing (UT) ; deconvolution, Lamb waves ; guided waves ; signal processing ; mode separation ; signal processing |
| Abstract [eng] |
Lamb waves are ultrasonic waves known for long range Structural Health Monitoring applications in pipelines, railway lines and aircraft structures. In case of aerospace structures, the interpretation of the signals becomes complex to interpret due to the following reasons: the dispersive nature of the Lamb waves results in stretching of the wave packets when propagating; multiple modes can propagate in same frequency of excitation which can cause overlapping of wave packets in the received signal; the change in the propagating medium such as bonding region in composites, stiffeners and defects causes reflections and mode conversions which can result in new wave packets in received signals. Such kinds of effects make it difficult for one to understand recorded signal after propagation for further signal processing and defect detection algorithms. Using the deconvolution signal processing technique, it is possible to compensate the dispersion effect, improve signal to noise ratio and to separate each wave packet present in the signal in spite of the overlapping effects. So, this work explains the application of deconvolution technique to improve the interpretability of ultrasonic Lamb wave measurements using the data from experimental investigation of composite aircraft structures. |
| Published |
Bad Breisig : NDT.net |
| Type |
Conference paper |
| Language |
English |
| Publication date |
2021 |
| CC license |
|
