Pulsed laser-scanning laser Doppler vibrometer (PL-SLDV) phased arrays for damage detection in aluminum plates

Tian, Zhenhua; Howden, Stephen; Ma, Zhaoyun; Xiao, Wenfeng; Yu, Lingyu

doi:10.1016/j.ymssp.2018.11.016

Cited by 54 publications

(24 citation statements)

References 31 publications

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“…The side length of the damage is 10 mm, and the depth is 0.5 mm (Figure 2(a)). A 3-count toneburst at 120 kHz is used where we can achieve dominant A 0 mode that has strong out-of-plane motion for SLDV sensing (Tian et al, 2019). The wavelength is about 8.7 mm, which is appropriate for the intended damage detection conducted in this study (Alleyne and Cawley, 1992; Cawley, 1997).…”

Section: Detection and Resultsmentioning

confidence: 99%

“…Recently the scanning laser Doppler vibrometer (SLDV) attracts great interests for Lamb wave wavefield data based damage detection, quantification, and SHM/NDE (Harb and Yuan, 2016; Rogge and Leckey, 2013; Staszewski et al, 2004; Tian et al, 2019; Yu et al, 2013, 2015). The SLDV works on the Doppler effect and can measure the Lamb wave particle motion in terms of velocities or displacement along the laser beam.…”

Section: Introductionmentioning

confidence: 99%

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Lamb wave imaging with actuator network for damage quantification in aluminum plate structures

2020

Journal of Intelligent Material Systems and Structures

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Lamb waves have been widely used for damage detection on plate-like structures. However, there are still considerable interests on quantifying damage with complex profile. In this article, quantification of complex damage in plate-like structures using a network of actuators and time-space Lamb wavefield is investigated. The actuator network inspection system is implemented with multiple PZT transducers for Lamb wave actuation in round robin pattern and scanning laser Doppler vibrometer for wavefield sensing. The PZT network is arranged in a way that the target area is fully enclosed and Lamb waves come to the damage from all directions. Waves induced by the damage are subsequently obtained through frequency-wavenumber filtering, using the experimentally acquired dispersion curves presented in the paper. The filtered waves from all wave actuators are then used to generate a synthetic image of the damage being inspected. Two cases of complex damage are evaluated on aluminum plates, mass loss with triangular profile and mass addition with a three-letter cluster profile. Our results show that the damages are not only detected but also their profiles are clearly outlined in the images. We believe the subject methods provide improved evaluation of damage profile for Lamb wavefield based damage quantification.

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Section: Detection and Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Lamb wave imaging with actuator network for damage quantification in aluminum plate structures

2020

Journal of Intelligent Material Systems and Structures

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“…The specific guided-wave parameters and the energy skew effects are also taken into account for anisotropic materials [20]. The use of receiver bemforming and laser Doppler vibrometer have been further explored in damage detection and quantification in composite structures [21], and in an improved damage identification approach in aluminum plates by a modified DAS algorithm [22].…”

Section: Background Of Beamforming Techniquesmentioning

confidence: 99%

An Empirical Study on Transmission Beamforming for Ultrasonic Guided-Wave Based Structural Health Monitoring

Cantero‐Chinchilla

Aranguren

Malik

et al. 2020

Sensors

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The development of reliable structural health monitoring techniques is enabling a healthy transition from preventive to condition-based maintenance, hence leading to safer and more efficient operation of different industries. Ultrasonic guided-wave based beamforming is one of the most promising techniques, which supports the monitoring of large thin-walled structures. However, beamforming has been typically applied to the post-processing stage (also known as virtual or receiver beamforming) because transmission or physical beamforming requires complex hardware configurations. This paper introduces an electronic structural health monitoring system that carries out transmission beamforming experiments by simultaneously emitting and receiving ultrasonic guided-waves using several transducers. An empirical characterization of the transmission beamforming technique for monitoring an aluminum plate is provided in this work. The high signal-to-noise ratio and accurate angular precision of the physical signal obtained in the experiments suggest that transmission beamforming can increase the reliability and robustnessof this monitoring technique for large structures and in real-world noisy environments.

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“…Lamb wave-based structural health monitoring (SHM) technique has been proved to be one of the strongest techniques for online and real-time damage detection of aircraft structures because of the superior capability of travelling long distances and covering large monitoring area with limited numbers of piezoelectric sensors [1]. Plenty of Lamb wave-based damage detection algorithms, including delay and sum [2,3], phased array [4,5], tomography [6,7,8,9,10,11], and migration [12,13], have been developed. Comprehensive reviews on the application of Lamb wave for structural health monitoring can be found in the literature [1,14,15].…”

Section: Introductionmentioning

confidence: 99%

“…Comprehensive reviews on the application of Lamb wave for structural health monitoring can be found in the literature [1,14,15]. Depending on whether reference data of Lamb wave in the pristine structure is needed or not, these algorithms can be divided into two categories, i.e., reference-free algorithms [16,17,18,19] and reference-dependent ones [2,3,4,5,6,7,8,9,10,11,12,13]. Reference-dependent algorithms are more practical than reference-free ones for real application in aircraft structures due to the complex nature of the Lamb wave, including multiple mode, modes conversion and scattering at the boundary.…”

Section: Introductionmentioning

confidence: 99%

Identification and Compensation Technique of Non-Uniform Temperature Field for Lamb Wave-and Multiple Sensors-Based Damage Detection

Sun

et al. 2019

Sensors

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Lamb wave-based damage detection for large-scale composites is one of the most prosperous structural health monitoring technologies for aircraft structures. However, the temperature has a significant effect on the amplitude and phase of the Lamb wave signal so that temperature compensation is always the focus problem. Especially, it is difficult to identify the damage in the aircraft structures when the temperature is not uniform. In this paper, a compensation method for Lamb wave-based damage detection within a non-uniform temperature field is proposed. Hilbert transform and Levenberg-Marquardt optimization algorithm are developed to extract the amplitude and phase variation caused by the change of temperature, which is used to establish a data-driven model for reconstructing the reference signal at a certain temperature. In the temperature compensation process, the current Lamb wave signal of each exciting-sensing path under the estimated structural condition is substituted into the data-driven model to identify an interpolated initial temperature field, which is further processed by an outlier removing algorithm to eliminate the effect of damage and get the actual non-uniform temperature field. Temperature compensation can be achieved by reconstructing the reference signals within the identified non-uniform temperature field, which are used to compare with the current acquired signals for damage imaging. Both simulation and experiment were conducted to verify the feasibility and effectiveness of the proposed non-uniform temperature field identification and compensation technique for Lamb wave-based structural health monitoring.

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Pulsed laser-scanning laser Doppler vibrometer (PL-SLDV) phased arrays for damage detection in aluminum plates

Cited by 54 publications

References 31 publications

Lamb wave imaging with actuator network for damage quantification in aluminum plate structures

Lamb wave imaging with actuator network for damage quantification in aluminum plate structures

An Empirical Study on Transmission Beamforming for Ultrasonic Guided-Wave Based Structural Health Monitoring

Identification and Compensation Technique of Non-Uniform Temperature Field for Lamb Wave-and Multiple Sensors-Based Damage Detection

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