Monitoring pipe wall integrity using fiber Bragg grating-based sensing of low-frequency guided ultrasonic waves

Ultrasonics ◽  
2018 ◽  
Vol 90 ◽  
pp. 120-124 ◽  
Author(s):  
Pabitro Ray ◽  
Balaji Srinivasan ◽  
Krishnan Balasubramaniam ◽  
Prabhu Rajagopal
Keyword(s):  
Fiber Bragg Grating ◽  
Pipe Wall ◽  
Low Frequency ◽  
Ultrasonic Waves ◽  
Bragg Grating ◽  
Guided Ultrasonic Waves

Low-frequency fiber Bragg grating accelerometer based on a double-semicircle cantilever

2014 ◽  
Vol 20 (3) ◽  
pp. 190-193 ◽  
Author(s):  
Xiaolei Zhang ◽  
Qiangzhou Rong ◽  
Hao Sun ◽  
Shen Yang ◽  
Liutong Yuan ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Low Frequency ◽  
Bragg Grating

Fiber Bragg Grating Accelerometer Based on L-Shaped Rigid Beam and Elastic Diaphragm for Low-Frequency Vibration Measurement

2015 ◽  
Vol 35 (12) ◽  
pp. 1206005 ◽  
Author(s):  
曾宇杰 Zeng Yujie ◽  
王俊 Wang Jun ◽  
杨华勇 Yang Huayong ◽  
马丽娜 Ma Lina
Keyword(s):  
Fiber Bragg Grating ◽  
Low Frequency ◽  
Vibration Measurement ◽  
Bragg Grating ◽  
Low Frequency Vibration

Symmetric low-frequency feature-guided ultrasonic waves in thin plates with transverse bends

Ultrasonics ◽  
2015 ◽  
Vol 56 ◽  
pp. 232-242 ◽  
Author(s):  
Abilasha Ramdhas ◽  
Roson Kumar Pattanayak ◽  
Krishnan Balasubramaniam ◽  
Prabhu Rajagopal
Keyword(s):  
Low Frequency ◽  
Ultrasonic Waves ◽  
Thin Plates ◽  
Guided Ultrasonic Waves ◽  
Frequency Feature

Damage Detection in CFRP Bonded Structures by Using Fiber Bragg Grating Sensors as Ultrasonic Wave Receivers

2007 ◽  
Vol 334-335 ◽  
pp. 1137-1140
Author(s):  
Nobuo Takeda ◽  
Y. Okabe ◽  
J. Kuwahara ◽  
Toshimichi Ogisu ◽  
Seiji Kojima
Keyword(s):  
Wavelet Transform ◽  
Damage Detection ◽  
Fiber Bragg Grating ◽  
Correlation Coefficient ◽  
Ultrasonic Wave ◽  
Detection System ◽  
Damage Index ◽  
Adhesive Layer ◽  
Ultrasonic Waves ◽  
Bragg Grating

The authors developed a damage detection system that generates ultrasonic waves with a piezo-ceramic actuator and receives them by a fiber Bragg grating (FBG) sensor. In this research, this system was applied to evaluate debonding progress in CFRP skin/stringer bonded structures. FBG sensors were bonded on the stringer or embedded in the adhesive layer. Then, ultrasonic wave at 300kHz was propagated through the debonded region, and the wavelet transform was applied to the received waveform. After that, a new damage indexand a correlation coefficient were calculated from the distribution of the wavelet transform coefficient. As a result, the damage index increased and the correlation coefficient decreased with an increase in the debonded area. Hence the length of the debonding between the skin and the stringer could be well evaluated.

Design of low frequency fiber Bragg grating acceleration sensing system

2014 ◽  
Author(s):  
Weijun Wu ◽  
Haitao Li ◽  
Hong Luo ◽  
Shuidong Xiong
Keyword(s):  
Fiber Bragg Grating ◽  
Low Frequency ◽  
Bragg Grating ◽  
Sensing System

Evaluation of debonding progress in composite bonded structures using ultrasonic waves received in fiber Bragg grating sensors

2007 ◽  
Vol 16 (4) ◽  
pp. 1370-1378 ◽  
Author(s):  
Yoji Okabe ◽  
Junichiro Kuwahara ◽  
Kazuki Natori ◽  
Nobuo Takeda ◽  
Toshimichi Ogisu ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Ultrasonic Waves ◽  
Bragg Grating ◽  
Fiber Bragg Grating Sensors
Sign in / Sign up

Export Citation Format

Share Document