Damage detection using the signal entropy of an ultrasonic sensor network

Rojas, E.; Baltazar, Arturo; Loh, Kenneth J.

doi:10.1088/0964-1726/24/7/075008

Cited by 27 publications

(18 citation statements)

References 36 publications

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“…In 2014, Zhong et al [ 25 ] proposed a near-field multiple signal classification (MUSIC) algorithm to detect the damage on aircraft composite structures. In 2015, Rojas et al [ 26 ] presented the implementation of a network of piezoelectric sensors randomly placed on a plate-like structure to detect and locate artificial damage. In 2016, Shen et al [ 27 ] presented a combined analytical finite element model approach for the accurate, efficient, and versatile simulation of 2-D Lamb wave propagation and interaction with damage.…”

Section: Introductionmentioning

confidence: 99%

Plate Waves Scattering Analysis and Active Damage Detection

2021

Sensors

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This study investigates and evaluates the technology of using plate waves to detect the locations and sizes of circular holes and cracks in plates. Piezoelectric ceramic discs surface-mounted on both sides of an aluminum alloy plate were used as narrow-frequency plate wave actuators and sensors, and the antisymmetric plate wave signal was analyzed by wavelet transform in the time-frequency domain. The damage location and frequency spectrum characteristics were identified by the wave through time-of-flight difference and signal analysis of the damage scattered wave group. The plate wave signal of the damaged plate included the scattered wave signal and the plate wave signal transmitted directly between the piezoelectric discs. Under ideal conditions, the plate wave signal indicating damage can be obtained by subtracting the plate wave signal in a plate without damage from the plate wave signal scattered from actuators to sensors. This study established an optimization program based on the simplex algorithm to inversely calculate the location of the plate damage. The developed damage location objective function has a unique global minimum value that can ensure the accuracy of the damage location calculation, and good results were obtained in experiments. The spectral characteristics of the scattered plate wave were related to the type, size, wave propagation path, and incident angle of the damage. Numerical analyses of scattered spectra for various damages are needed as references to compare with experimental results in the future.

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Section: Introductionmentioning

confidence: 99%

Plate Waves Scattering Analysis and Active Damage Detection

2021

Sensors

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“…Since the RAPID does not require the wave velocity for imaging, it is suitable for complex structures such as wind turbine blades, aircraft wings and variable thickness plates. Other statistical imaging methods may use the difference of the fractal dimension [ 11 ] and the signal entropy [ 12 ] between two signals to be DIs. However, the above imaging methods have limited imaging performance unless dense transmitter-receiver pairs are available.…”

Section: Introductionmentioning

confidence: 99%

Weighted Structured Sparse Reconstruction-Based Lamb Wave Imaging Exploiting Multipath Edge Reflections in an Isotropic Plate

Yang

Deng

2020

Sensors

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Lamb wave-based structural health monitoring techniques have the ability to scan a large area with relatively few sensors. Lamb wave imaging is a signal processing strategy that generates an image for locating scatterers according to the received Lamb waves. This paper presents a Lamb wave imaging method, which is formulated as a weighted structured sparse reconstruction problem. A dictionary is constructed by an analytical Lamb wave scattering model and an edge reflection prediction technique, which is used to decompose the experimental scattering signals under the constraint of weighted structured sparsity. The weights are generated from the correlation coefficients between the scattering signals and the predicted ones. Simulation and experimental results from an aluminum plate verify the effectiveness of the present method, which can generate images with sparse pixel values even with very limited number of sensors.

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“…Kharrat et al [24] selected the torsional wave T(0, 1) to detect the defects of pipeline. Rojas et al [25] combined dispersion curve with short-time wavelet entropy of Lamb mode to detect flat bottom hole defects in the center of the plates.…”

Section: Introductionmentioning

confidence: 99%

Effects of Adhesive Parameters on Dispersion Characteristics of Ultrasonic Guided Waves in Composite Pipes

Yan

2019

Advances in Materials Science and Engineering

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The aim of the investigation presented here was to understand how the viscosity parameters of an adhesive layer affect group velocity and attenuation of the double-layer adhered pipe. Various parameter combinations (attenuation of longitudinal wave and shear wave, pαL and qαT; thickness, d; and density, nρ) were utilized in order to generate different uncured degrees of the adhesive layer. In the frequency range 0∼500 kHz, the group velocity dispersion curves and attenuation dispersion curves were obtained from these models. Then, the group velocity and attenuation of the two commonly used modes, L0,2 and T0,1, were compared and analyzed. The results have shown that it is important to remark that little effect on group velocity was caused, and significant linear increases of attenuation occur with increase in q, d, and n. However, variable p had little effect on attenuation; more modes emerged when d increased or n decreased, causing difficulties on mode identification and signal processing. The numerical results provided a useful way to evaluate bonding quality by measuring the group velocity and attenuation in the pipelines.

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Damage detection using the signal entropy of an ultrasonic sensor network

Cited by 27 publications

References 36 publications

Plate Waves Scattering Analysis and Active Damage Detection

Plate Waves Scattering Analysis and Active Damage Detection

Weighted Structured Sparse Reconstruction-Based Lamb Wave Imaging Exploiting Multipath Edge Reflections in an Isotropic Plate

Effects of Adhesive Parameters on Dispersion Characteristics of Ultrasonic Guided Waves in Composite Pipes

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