Modal analysis and damage detection by Fiber Bragg grating sensors

Capoluongo, P.; Ambrosino, C.; Campopiano, Stefania; Cutolo, A.; Giordano, M.; Bovio, Igor; Lecce, Leonardo; Cusano, A.

doi:10.1016/j.sna.2006.04.018

Cited by 50 publications

(24 citation statements)

References 6 publications

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“…The experimental results confirmed that the FBGs can be successfully employed to measure the modal parameters of complex structures. Capoluongo et al 18 used FBGs to conduct modal analysis and damage detection on a sample structure obtained by joining two steel bars. The result showed that FBGs can retrieve mode shapes up to frequency of 1.5 kHz.…”

Section: Fbg-based Modal Testing For Damage Identificationmentioning

confidence: 99%

Lamb wave-based damage detection of composite shells using high-speed fiber-optic sensing

et al. 2014

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A Lamb wave-based damage identification method called damage imaging method for composite shells is presented. A damage index (DI) is generated from the delay matrix of the Lamb wave response signals, and it is used to indicate the location and approximate area of the damage. A piezoelectric actuator is employed to generate the Lamb waves that are subsequently captured by a fiber Bragg grating (FBG) sensor element array multiplexed in a single fiber connected to a high-speed fiber-optic sensor system. The high-speed sensing is enabled by an innovative parallel-architecture optical interrogation system. The viability of this method is demonstrated by analyzing the numerical and experimental Lamb wave response signals from laminated composite shells. The technique only requires the response signals from the plate after damage, and it is capable of performing near real-time damage identification. This study sheds some light on the application of a Lamb wave-based damage detection algorithm for curved plate/shell-type structures by using the relatively low frequency (around 100 kHz) Lamb wave response and the high-speed FBG sensor system.

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Section: Fbg-based Modal Testing For Damage Identificationmentioning

confidence: 99%

Lamb wave-based damage detection of composite shells using high-speed fiber-optic sensing

et al. 2014

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“…The monitoring system was carried by one of the authors from the laboratories in Institute of Optoelectronic Technology to School of Mechanical Engineering in Beijing Jiaotong University where it was setup to monitor the installation of FBG sensors on the sensitive parts of the motor bogie where is prone to problems and thus to provide the system for real-time and continuous measurements. Fig.7 and Fig.8 show strain measurement from one FBG sensor when give the bogie a huge strain in the form of sine wave, and the FBG sensor monitor system can measure the strain accurately [9] . The FBG sensors can measure the physical quantities accurately.The temperature it measured was correspond with the standard temperature measured simultaneously by the traditional thermometer.When measured a frequency excited by vibration generator,the result is accord with the frequency displayed.…”

Section: Field Testmentioning

confidence: 99%

The real-time safety monitoring of railway condition by FBG sensor

Yang

Wang

et al. 2009

2009 9th International Conference on Electronic Measurement &Amp; Instruments

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The safety and reliability is very important for railway industry. In this paper we propose a Fiber Bragg grating monitoring system on line to realize real-time fast distributed measurement of physical quantities such as temperature, strains and vibration of the railway. The Fiber Bragg grating sensor can be able to bear high pressure ,resistant to corrosion and resist the electromagnetism disturbance, using safety in harmful environment. Furthermore, it can directly measured multiplex physical quantities at various locations using a single unit of FBG by using the technology of wavelength division multiplexing (WDM).

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“…Many scholars have carried out a lot of research on the damage identification methods based on FBG sensors [6,7,8]. Capoluongo proved that the FBG sensor can replace the accelerometer in vibration test for the structure damage detection [9]. Hwang, Kim established the equations of matrix changes with the damage change by using measured data, then solved the matrix changes using the least square method to determine the damage location [10].…”

Section: Introductionmentioning

confidence: 99%

Application of interpolation algorithm in plate structure detection based on Fiber Bragg grating sensing technology

Tan

2015

IEICE Electron. Express

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Due to the speed development of the mechanical equipment, it is important to realize the nondestructive evaluation in time to guarantee the safe and reliable operation. Distributed vibration detection is a conventional approach, but it may suffer from the disadvantages that it is complex to arrange a large amount of measuring points. On the other hand, some optimization algorithms are effective for approximate solutions. Taking into these considerations, we proposes a corresponding damage identification method to realize the damage localization by Fiber Bragg grating sensing technology with interpolation algorithm, which can create a simple method to identify the damaged region for the plate structural. In this paper, vibration detection based on some FBG sensors is built up and the optimum parameters are given. On the basis of this, interpolation algorithm is applied into vibration test and the experimental results show that localization method by the interpolation analysis is feasible to damage detection and it has better detection effect for a thin steel plate.

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Modal analysis and damage detection by Fiber Bragg grating sensors

Cited by 50 publications

References 6 publications

Lamb wave-based damage detection of composite shells using high-speed fiber-optic sensing

Lamb wave-based damage detection of composite shells using high-speed fiber-optic sensing

The real-time safety monitoring of railway condition by FBG sensor

Application of interpolation algorithm in plate structure detection based on Fiber Bragg grating sensing technology

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