An imaging algorithm for damage detection with dispersion compensation using piezoceramic induced lamb waves

Zhang, Guangmin; Gao, Weihang; Song, Gangbing; Song, Yue

doi:10.1088/1361-665x/26/2/025017

Cited by 22 publications

(19 citation statements)

References 38 publications

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“…Image of the detection area is reconstructed based on the cross‐correlations of the refocused time reversed signals between different subgroups. Compared to, method in this paper can only compensate the dispersion effect, partly. Namely, only dispersion of the received signals that are measured via the experiment between the damage and the same transducers in each two transmitter and sensor pair can be partly compensate.…”

Section: Experimental Validation and Discussionmentioning

confidence: 99%

“…Namely, only dispersion of the received signals that are measured via the experiment between the damage and the same transducers in each two transmitter and sensor pair can be partly compensate. However, the proposed method, compared to, can provide adequate noise suppression capability. Similar notion about the partly compensating can be find as partly recompressing effect in TRP .…”

Section: Experimental Validation and Discussionmentioning

confidence: 99%

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A novel time reversal sub-group imaging method with noise suppression for damage detection of plate-like structures

Gao

Zhang

et al. 2017

Struct Control Health Monit

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Summary In this paper, a new time reversal imaging (TRI) algorithm with noise suppression is developed for the application of imaged based structural damage detection of plate‐like structures. The conventional TRI method suffers from performance degradation in high noise condition. The proposed method addresses the aforementioned issues. First, an array of detection transducers is used and is divided into several subgroups. Then, the echo signals of the subgroups are time reversed and reemitted via numerical computation. Finally, the cross‐correlation functions of the summation of refocused time reversed signals in each subgroup are obtained to locate damages. The time reversed signals at the reference time are irrelevant to the noise, meanwhile, the multiple refocused signals in each subgroup are first added and then cross‐correlated. Therefore, the proposed method can effectively suppress noise. To validate the effectiveness of proposed method, 2 experiments were performed. The 2 experiments involved 2 aluminum plate specimens. Each specimen was equipped with 4 surface‐bonded lead zirconate titanate transducers. One specimen involved a simulated damage (an addition of a mass), and the other one involved an actual through‐hole damage. The experimental performances of the proposed method are compared to those of the conventional TRI method. The imaging results demonstrated that the damage on both specimens was clearly displayed with high spatial resolution by the proposed method even under the low signal‐to‐noise ratio condition. On the contrary, the location of the damage computed by the conventional TRI method was submerged in noise and cannot be distinguished.

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Section: Experimental Validation and Discussionmentioning

confidence: 99%

Section: Experimental Validation and Discussionmentioning

confidence: 99%

A novel time reversal sub-group imaging method with noise suppression for damage detection of plate-like structures

Gao

Zhang

et al. 2017

Struct Control Health Monit

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“…The dispersion effect of guided waves is a large problem for most of damage imaging techniques. In order to compensate for this effect, a dispersion compensation model has been developed . Three damage imaging strategies are compared: DAS, dispersion compensation, and correlation‐based technics .…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical research on damage localization in plate-like concrete structures using hybrid approach

Stojić

Nestorović

Marković

et al. 2018

Struct Control Health Monit

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This paper presents an experimental–numerical analysis of damage localization of concrete plate‐like elements on the basis of hybrid approach. The proposed hybrid approach uses the fast discrete wavelet transform, energy approach, and time of flight criterion for the purpose of localization of single and multidamage problems inside or on the periphery of concrete elements. Verification of the proposed damage localization approach has been performed under laboratory conditions using a laser scanning‐based system with piezoelectric excitation of the wave propagation. Numerical simulation of the wave propagation is performed using the explicit finite element method using 3D models with linear‐elastic material model of concrete with Rayleigh damping. The Rayleigh damping coefficients are determined on the basis of experimental data and implemented in numerical models. Validation of the numerical model is conducted, based on the comparison with sensor output signals obtained through experimental measuring and a very good agreement of results is obtained. The proposed hybrid approach to damage localization is verified using 15 different models/specimens, varying the number, shape (circular or notched), and position of damage, as well as the number and placement of actuators/sensors. For all the analyzed scenarios, the hybrid approach successfully localized the damage even for the least number of used sensor positions. In the models with the circular damage, the damage image created on the basis of the hybrid approach is almost identical to the actual shape of the damage, indicating a good potential of the method for damage localization.

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“…Ultrasonic stress waves, either passive acoustic emission signals or active guided waves, propagating in a structure can be employed to interpret the structural status, especially to detect small structural damage, such as debonding, lamination, crack, corrosion, etc. Over the past few decades, the corresponding methods and techniques have also been proven effective and promising in a variety of metal, composite, concrete and other materials and structures [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 ]. Ultrasonic stress waves, generated by either transducers or a rapid release of energy within a stressed material, are often at a fairly high frequency, from several tens of kHz to approximately several MHz.…”

Section: Introductionmentioning

confidence: 99%

“…Ultrasonic stress waves, generated by either transducers or a rapid release of energy within a stressed material, are often at a fairly high frequency, from several tens of kHz to approximately several MHz. These waves are captured usually by ultrasonic transducers, including piezoelectric wafers [ 7 , 9 , 10 ], magnetostrictive sensors [ 11 , 12 ], electromagnetic acoustic transducers (EMAT) [ 13 ], macro-fiber composites [ 14 , 15 ], etc. The aforementioned ultrasonic transducers are used to convert mechanical energy into electric or magnetic energy; therefore, they are more easily affected by electromagnetic interference.…”

Section: Introductionmentioning

confidence: 99%

Detection of Ultrasonic Stress Waves in Structures Using 3D Shaped Optic Fiber Based on a Mach–Zehnder Interferometer

Lan

Zhou

Xie

2018

Sensors

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This work proposes a 3D shaped optic fiber sensor for ultrasonic stress waves detection based on the principle of a Mach–Zehnder interferometer. This sensor can be used to receive acoustic emission signals in the passive damage detection methods and other types of ultrasonic signals propagating in the active damage detection methods, such as guided wave-based methods. The sensitivity of an ultrasonic fiber sensor based on the Mach–Zehnder interferometer mainly depends on the length of the sensing optical fiber; therefore, the proposed sensor achieves the maximum possible sensitivity by wrapping an optical fiber on a hollow cylinder with a base. The deformation of the optical fiber is produced by the displacement field of guided waves in the hollow cylinder. The sensor was first analyzed using the finite element method, which demonstrated its basic sensing capacity, and the simulation signals have the same characteristics in the frequency domain as the excitation signal. Subsequently, the primary investigations were conducted via a series of experiments. The sensor was used to detect guided wave signals excited by a piezoelectric wafer in an aluminum plate, and subsequently it was tested on a reinforced concrete beam, which produced acoustic emission signals via impact loading and crack extension when it was loaded to failure. The signals obtained from a piezoelectric acoustic emission sensor were used for comparison, and the results indicated that the proposed 3D fiber optic sensor can detect ultrasonic signals in the specific frequency response range.

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An imaging algorithm for damage detection with dispersion compensation using piezoceramic induced lamb waves

Cited by 22 publications

References 38 publications

A novel time reversal sub-group imaging method with noise suppression for damage detection of plate-like structures

A novel time reversal sub-group imaging method with noise suppression for damage detection of plate-like structures

Experimental and numerical research on damage localization in plate-like concrete structures using hybrid approach

Detection of Ultrasonic Stress Waves in Structures Using 3D Shaped Optic Fiber Based on a Mach–Zehnder Interferometer

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