Development of an FBG Sensor Array for Multi-Impact Source Localization on CFRP Structures

We proposed and studied an impact detection system based on a fiber Bragg grating (FBG) sensor array and multiple signal classification (MUSIC) algorithm to determine the location and the number of low velocity impacts on a carbon fiber-reinforced polymer (CFRP) plate. A FBG linear array, consisting of seven FBG sensors, was used for detecting the ultrasonic signals from impacts. The edge-filter method was employed for signal demodulation. Shannon wavelet transform was used to extract narrow band signals from the impacts. The Gerschgorin disc theorem was used for estimating the number of impacts. We used the MUSIC algorithm to obtain the coordinates of multi-impacts. The impact detection system was tested on a 500 mm × 500 mm × 1.5 mm CFRP plate. The results show that the maximum error and average error of the multi-impacts’ localization are 9.2 mm and 7.4 mm, respectively.

[1]  Sang Kwon Lee,et al.  Source Localization for Multiple Impacts Based on Elastodynamics and Wavelet Analysis , 2011 .

[2]  Hsien-Tsai Wu,et al.  Source number estimators using transformed Gerschgorin radii , 1995, IEEE Trans. Signal Process..

[3]  Dakai Liang,et al.  Wavelet packet energy characterization of low velocity impacts and load localization by optical fiber Bragg grating sensor technique. , 2013, Applied optics.

[4]  Sergio Oller,et al.  Impact damage identification in composite laminates using vibration testing , 2014 .

[5]  Andrzej Katunin,et al.  Stone impact damage identification in composite plates using modal data and quincunx wavelet analysis , 2015 .

[6]  Kihong Shin,et al.  Identification of Multiple Impacts on a Plate Using the Time-Frequency Analysis and the Kalman Filter , 2011 .

[7]  Lei Jia,et al.  Low velocity impact localization system of CFRP using fiber Bragg grating sensors , 2015 .

[8]  Seiji Kojima,et al.  Applications of fiber Bragg grating sensors and high‐speed interrogation techniques , 2005 .

[9]  Marcia Muller,et al.  Smart optical fiber sensor for impact localization on planar structures , 2013, 2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC).

[10]  Hyunbum Park,et al.  Experimental study on barely visible impact damage and visible impact damage for repair of small aircraft composite structure , 2013 .

[11]  Sridhar Krishnaswamy,et al.  Adaptive Fiber Bragg Grating Sensor Network for Structural Health Monitoring: Applications to Impact Monitoring , 2011 .

[12]  Véronique Michaud,et al.  Impact localisation with FBG for a self-healing carbon fibre composite structure , 2011 .

[13]  Shien-Kuei Liaw,et al.  Impact Response of a Wind Turbine Blade Measured by Distributed FBG Sensors , 2010 .

[14]  Lei Jia,et al.  Low Velocity Impact Localization on CFRP Based on FBG Sensors and ELM Algorithm , 2015, IEEE Sensors Journal.

[15]  Jinsong Leng,et al.  Impact source identification in a carbon fiber reinforced polymer plate by using embedded fiber optic acoustic emission sensors , 2014 .

[16]  Yu Wang,et al.  A time reversal focusing based impact imaging method and its evaluation on complex composite structures , 2011 .

[17]  Xiaojuan Dang,et al.  Statistic Strategy of Damage Detection for Composite Structure Using the Correlation Function Amplitude Vector , 2015 .

[18]  Jayantha Ananda Epaarachchi,et al.  Impact location determination on thin laminated composite plates using an NIR-FBG sensor system , 2015 .