scholarly journals Acoustic Emission Source Localization System Using Fiber Bragg Grating Sensors and a Barycentric Coordinate-Based Algorithm

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Dandan Pang ◽  
Qingmei Sui ◽  
Ming Wang ◽  
Yaozhang Sai ◽  
Rongyao Sun ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Fiber Bragg Grating ◽  
Detection System ◽  
Dynamic Strain ◽  
Bragg Grating ◽  
Al Alloy ◽  
Localization Algorithm ◽  
Alloy Plate ◽  
Morlet Wavelet Transform ◽  
Barycentric Coordinate

Structures and machines are very susceptible to some barely visible defects; acoustic emission (AE) is an effective technique of detecting defects and examining growth and location of these defects. In this paper, a new method was proposed to predict the position of the AE source. The dynamic strain signal from the AE source was acquired by fiber Bragg grating (FBG) sensors. Complex Morlet wavelet transform was used to extract narrowband signals from AE waves. It was proposed that the barycentric coordinate-based localization algorithm can be used to predict the coordinates of the AE source. The validation tests based on the designed AE detection system were performed on a 500 mm × 500 mm × 2 mm Al-alloy plate. The experimental results show that the proposed method is feasible.

scholarly journals An Investigation of Structural Damage Location Based on Ultrasonic Excitation-Fiber Bragg Grating Detection

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Yuegang Tan ◽  
Li Cai ◽  
Bei Peng ◽  
Lijun Meng
Keyword(s):  
Structural Health Monitoring ◽  
Damage Detection ◽  
Fiber Bragg Grating ◽  
Health Monitoring ◽  
Structural Damage ◽  
Detection System ◽  
Bragg Grating ◽  
Alloy Plate ◽  
Structural Health ◽  
Sensing System

With the continuous development of mechanical automation, the structural health monitoring techniques are increasingly high requirements for damage detection. So structural health monitoring (SHM) has been playing a significant role in terms of damage prognostics. The main contribution pursued in this investigation is to establish a detection system based on ultrasonic excitation and fiber Bragg grating sensing, which combines the advantages of the ultrasonic detection and fiber Bragg grating (FBG). Differencing from most common approaches, a new way of damage detection is based on fiber Bragg grating (FBG), which can easily realize distributed detection. The basic characteristics of fiber Bragg grating sensing system are analyzed, and the positioning algorithm of structural damage is derived in theory. On these bases, the detection system was used to analyze damage localization in the aluminum alloy plate of a hole with diameters of 6 mm. Experiments have been carried out to demonstrate that the sensing system was feasible and that the estimation method of the location algorithm was easy to implement.

Temperature-controlled fiber Bragg grating dynamic strain detection system

2005 ◽  
Vol 119 (1) ◽  
pp. 68-74 ◽  
Author(s):  
Xiao-Dong Wu ◽  
Cornelia Schmidt-Hattenberger ◽  
Kay Krüger ◽  
Jun Chen
Keyword(s):  
Fiber Bragg Grating ◽  
Detection System ◽  
Dynamic Strain ◽  
Bragg Grating ◽  
Temperature Controlled ◽  
Strain Detection

scholarly journals Performance analysis of Strain sensor based on Fiber Bragg Grating

2020 ◽  
Vol 32 ◽  
pp. 02006
Author(s):  
Aniket Shivram More ◽  
Pritam sanjay Lad ◽  
Shivram Ramnarayanan Krishnan ◽  
Savita R. Bhosale
Keyword(s):  
Performance Analysis ◽  
Fiber Bragg Grating ◽  
Intrusion Detection System ◽  
Detection System ◽  
Data Communication ◽  
Strain Sensor ◽  
Dynamic Strain ◽  
Bragg Grating ◽  
Bragg Wavelength ◽  
Short Section

A fiber Bragg grating can be worked as reflector, it is constructed in a short section of optical fiber that reflects light of specific wavelength and allow to pass remaining wavelengths. This is possible by creating a periodic change in refractive index within the fiber core. The change in the modal index of fiber caused due to strain results in a Bragg wavelength. This work describes performance of Fiber Bragg Gratings as a strain sensor at 1550nm wavelength is considered for simulation, corresponding dynamic strain and wavelength shifts are analysed. This performance analysis is useful especially for intrusion detection system where environments are harsh. This sensor is compatible with data communication system and can be used for remote sensing.

scholarly journals Ultrasonic Excitation – Fiber Bragg Grating Sensing Technique for Damage Identification

2018 ◽  
Vol 14 (07) ◽  
pp. 124
Author(s):  
Cai Li ◽  
Xiaoguang Yue
Keyword(s):  
Nondestructive Testing ◽  
Damage Detection ◽  
Fiber Bragg Grating ◽  
Damage Identification ◽  
Detection System ◽  
Research Work ◽  
Bragg Grating ◽  
Fiber Grating ◽  
Good Prospect ◽  
Localization Algorithm

<p class="0keywords"><span lang="EN-US">Nondestructive testing plays an important role in on-line equipment inspection. Traditional nondestructive testing methods have been widely utilized for this. Ultrasonic excitation-fiber Bragg grating sensing technique is based on well-developed optical fiber grating technology, which has a good prospect of damage detection for mechanical equipments. However the corresponding research is still at the starting stage and further research work is necessary. The main contribution pursued in this investigation is to establish a detection system based on <a name="OLE_LINK3"></a><a name="OLE_LINK2"></a>fiber Bragg grating sensing under ultrasonic excitation and predict the damage position through time delay on the plate structure. Differencing from the conventional approaches, a new way of damage detection utilizes fiber Bragg grating sensors and a position algorithm by two-dimensional method is derived. Moreover, wavelet <a name="OLE_LINK10"></a><a name="OLE_LINK9"></a>transform is adopted in the subsequent signal processing. Finally</span><span lang="EN-US">,</span><span lang="EN-US"> a platform for experiment is built to verify the theoretical analysis of the sensing characterization of the fiber Bragg grating sensor in ultrasonic excitation. Experiment results show that the wavelet transform is effective for signal denoising and our localization algorithm is feasible.</span></p>

Speed Estimation of a Three Phase Induction Motor Using Stator Dynamic Strain Measurement by Fiber Bragg Grating Sensor based in SVR

2021 ◽  
Author(s):  
Rafael Mancuso Paraiso Cavalcanti ◽  
Jaqueline Bierende ◽  
Beatriz Brusamarello ◽  
Jean Carlos Cardozo Da Silva ◽  
Giovanni Alfredo Guarneri ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Induction Motor ◽  
Strain Measurement ◽  
Fiber Bragg Grating Sensor ◽  
Dynamic Strain ◽  
Bragg Grating ◽  
Speed Estimation ◽  
Three Phase ◽  
Bragg Grating Sensor

scholarly journals Application of Fiber Bragg Grating Acoustic Emission Sensors in Thin Polymer-Bonded Explosives

Sensors ◽  
2018 ◽  
Vol 18 (11) ◽  
pp. 3778 ◽  
Author(s):  
Tao Fu ◽  
Peng Wei ◽  
Xiaole Han ◽  
Qingbo Liu
Keyword(s):  
Acoustic Emission ◽  
Fiber Bragg Grating ◽  
Bragg Grating ◽  
Location Method ◽  
Thin Polymer ◽  
Time Coefficient ◽  
Polymer Bonded Explosives ◽  
Acoustic Emission Sensors

Fiber Bragg grating (FBG) acoustic emission (AE) sensors have been used in many applications. In this paper, based on an FBG AE sensor, the sensing principle of the interaction between the AE wave and the sensor is introduced. Then, the directionality of the FBG AE sensor on the surface of a thin polymer-bonded explosive (PBX) material is studied. Finally, the time coefficient location method is proposed to correct the AE time detected by the FBG AE sensor, thereby improving the accuracy of location experiments.

Acoustic emission measurement using a strain-insensitive fiber Bragg grating sensor under varying load conditions

2009 ◽  
Vol 34 (19) ◽  
pp. 2942 ◽  
Author(s):  
Hiroshi Tsuda ◽  
Eiichi Sato ◽  
Tomio Nakajima ◽  
Hideyuki Nakamura ◽  
Takahiro Arakawa ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Fiber Bragg Grating ◽  
Fiber Bragg Grating Sensor ◽  
Bragg Grating ◽  
Emission Measurement ◽  
Bragg Grating Sensor ◽  
Acoustic Emission Measurement ◽  
Load Conditions
Sign in / Sign up

Export Citation Format

Share Document