A Novel Fabry-Pérot Optical Sensor for Guided Wave Signal Acquisition

In this paper, a novel hybrid damage detection system is proposed, which utilizes piezoelectric actuators for guided wave excitation and a new fibre optic (FO) sensor based on Fabry-Perot (FP) and Fiber Bragg Grating (FBG). By replacing the FBG sensors with FBG-based FP sensors in the hybrid damage detection system, a higher strain resolution is achieved, which results in higher damage sensitivity and higher reliability in diagnosis. To develop the novel sensor, optimum parameters such as reflectivity, a wavelength spectrum, and a sensor length were chosen carefully through an analytical model of the sensor, which has been validated with experiments. The sensitivity of the new FBG-based FP sensors was compared to FBG sensors to emphasize the superiority of the new sensors in measuring micro-strains. Lastly, the new FBG-based FP sensor was utilized for recording guided waves in a hybrid setup and compared to the conventional FBG hybrid sensor network to demonstrate their improved performance for a structural health monitoring (SHM) application.

[1]  Joseph L. Rose,et al.  Active health monitoring of an aircraft wing with embedded piezoelectric sensor/actuator network: I. Defect detection, localization and growth monitoring , 2007 .

[2]  Yoji Okabe,et al.  Novel real-time acousto-ultrasonic sensors using two phase-shifted fiber Bragg gratings , 2014 .

[3]  Zahra Sharif Khodaei,et al.  A Multi-Level Decision Fusion Strategy for Condition Based Maintenance of Composite Structures , 2016, Materials.

[4]  M. H. Aliabadi,et al.  Highly accurate online characterisation of cracks in plate-like structures , 2018 .

[5]  Hugo Thienpont,et al.  Aerospace-grade surface mounted optical fibre strain sensor for structural health monitoring on composite structures evaluated against in-flight conditions , 2019, Smart Materials and Structures.

[6]  A. Minardo,et al.  Response of fiber Bragg gratings to longitudinal ultrasonic waves , 2005, IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control.

[7]  T B Sorensen,et al.  [Fibre optic]. , 1975, Ugeskrift for laeger.

[8]  B. Sorazu,et al.  The Detection of Ultrasound Using Fiber-Optic Sensors , 2008, IEEE Sensors Journal.

[9]  Hojjat Adeli,et al.  Monitoring the behavior of steel structures using distributed optical fiber sensors , 2000 .

[10]  Wieslaw Ostachowicz,et al.  New trends in structural health monitoring , 2013 .

[11]  Lijuan Cheng,et al.  Fiber Bragg grating sensors , 2010 .

[12]  Nobuo Takeda,et al.  Development of smart composite structures with small-diameter fiber Bragg grating sensors for damage detection: Quantitative evaluation of delamination length in CFRP laminates using Lamb wave sensing , 2005 .

[13]  T. Erdogan.  Fiber grating spectra , 1997 .

[14]  Alfredo Güemes,et al.  Optical Fiber Distributed Sensing - Physical Principles and Applications , 2010 .

[15]  Dimitrios G. Bekas,et al.  An Innovative Diagnostic Film for Structural Health Monitoring of Metallic and Composite Structures , 2018, Sensors.

[16]  Qi Wu,et al.  High-sensitivity ultrasonic phase-shifted fiber Bragg grating balanced sensing system. , 2012, Optics express.

[17]  Nobuo Takeda,et al.  Development of damage monitoring system for aircraft structure using a PZT actuator/FBG sensor hybrid system , 2004, SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[18]  Alan D. Kersey,et al.  Fiber optic sensors in concrete structures: a review , 1996 .

[19]  Yi Jiang,et al.  Fourier Transform White-Light Interferometry for the Measurement of Fiber-Optic Extrinsic Fabry–PÉrot Interferometric Sensors , 2008, IEEE Photonics Technology Letters.

[20]  Junghyun Wee,et al.  Enhancement of Ultrasonic Lamb Wave Transfer to Fiber Bragg Grating Sensors through Remote Bonding. , 2018 .

[21]  Byeong Ha Lee,et al.  Interferometric Fiber Optic Sensors , 2012, Sensors.

[22]  Junji Takatsubo,et al.  Investigation of fatigue crack in stainless steel using a mobile fiber Bragg grating ultrasonic sensor , 2007 .

[23]  Raffaella Di Sante,et al.  Fibre Optic Sensors for Structural Health Monitoring of Aircraft Composite Structures: Recent Advances and Applications , 2015, Sensors.

[24]  Y. Okabe,et al.  Using optical fibers for ultrasonic damage detection in aerospace structures , 2016 .

[25]  J. Michaels.  Detection, localization and characterization of damage in plates with an in situ array of spatially distributed ultrasonic sensors , 2008 .