Focusing of Time Reversal Lamb Waves and Its Applications in Structural Health Monitoring

Zhang, Haiyan; Chen, Xianhua; Cao, Yaping; Yu, Jianbo

doi:10.1088/0256-307x/27/10/104301

Cited by 12 publications

(1 citation statement)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Damage of industrial infrastructure, aircraft, bridges, pipes, and rails is a significant problem that involves various safety issues [ 1 ]. Ultrasonic guided waves, which are used as a reliable tool in structural health monitoring (SHM) for detecting and monitoring damage, have received considerable attention because these waves can travel over long distances with less signal loss and thus can cover large monitoring areas [ 2 , 3 , 4 , 5 ]. In an SHM system that uses guided waves for damage detection, ultrasonic transducers can be permanently attached to plate-like or pipe-like structures.…”

Section: Introductionmentioning

confidence: 99%

A New Approach to Guided Wave Ray Tomography for Temperature-Robust Damage Detection Using Piezoelectric Sensors

Shi

et al. 2018

Sensors

View full text Add to dashboard Cite

In this paper, a new approach to guided wave ray tomography for temperature-robust damage detection with time-of-flight (TOF) temperature compensation is developed. Based on the linear relationship between the TOF of a guided wave and temperature, analyses show that the TOF of the baseline signal can be compensated by the temperature measurement of the inspected materials without estimating the temperature compensation parameters. The inversion is based on the optimization of the TOF misfit function between the inspected and compensated baseline TOFs of the guided waves, and is applied by the elastic net penalty approach to perform thickness change mapping in a structural health monitoring (SHM) application. Experiments that are conducted in isotropic plates by piezoelectric sensors demonstrate the effectiveness of the proposed method. According to the results, our approach not only eliminates the artefacts that are caused by a temperature variation from 25 °C to 70 °C but also provides more accurate and clearer imaging of damage than conventional ray tomography methods.

show abstract

Section: Introductionmentioning

confidence: 99%

A New Approach to Guided Wave Ray Tomography for Temperature-Robust Damage Detection Using Piezoelectric Sensors

Shi

et al. 2018

Sensors

View full text Add to dashboard Cite

show abstract

A Baseline-Free Defect Imaging Technique in Plates Using Time Reversal of Lamb Waves

Jeong

Cho

Wei

2011

Chinese Phys. Lett.

View full text Add to dashboard Cite

We present an analytical investigation for a baseline-free imaging of a defect in plate-like structures using the time-reversal of Lamb waves. We first consider the flexural wave (𝐴0 mode) propagation in a plate containing a defect, and reception and time reversal process of the output signal at the receiver. The received output signal is then composed of two parts: a directly propagated wave and a scattered wave from the defect. The time reversal of these waves recovers the original input signal, and produces two additional sidebands that contain the time-offlight information on the defect location. One of the side-band signals is then extracted as a pure defect signal. A defect localization image is then constructed from a beamforming technique based on the time-frequency analysis of the side band signal for each transducer pair in a network of sensors. The simulation results show that the proposed scheme enables the accurate, baseline-free imaging of a defect.

show abstract

Time-Domain Second-Harmonic Generation of Primary Lamb-Wave Propagation in an Elastic Plate

Deng¹,

Xiang²,

Liu³

2011

Chinese Phys. Lett.

View full text Add to dashboard Cite

We present an experimental observation of the generation of the time-domain second harmonic by propagation of the primary Lamb-wave tone-burst. For a case where the phase velocity matching between the primary and the double frequency Lamb waves is satisfied but the group velocity matching between them is not, our observation clearly shows that the duration of the time-domain second-harmonic tone-burst, as well as its integrated amplitude, increases with the increasing propagation distance. This experimental result is consistent with the theoretical prediction and demonstrates that group velocity matching is not absolutely necessary for the generation of the cumulative time-domain second harmonic by primary Lamb-wave propagation.

show abstract

Focusing of Time Reversal Lamb Waves and Its Applications in Structural Health Monitoring

Cited by 12 publications

References 10 publications

A New Approach to Guided Wave Ray Tomography for Temperature-Robust Damage Detection Using Piezoelectric Sensors

A New Approach to Guided Wave Ray Tomography for Temperature-Robust Damage Detection Using Piezoelectric Sensors

A Baseline-Free Defect Imaging Technique in Plates Using Time Reversal of Lamb Waves

Time-Domain Second-Harmonic Generation of Primary Lamb-Wave Propagation in an Elastic Plate

Contact Info

Product

Resources

About