Strain monitoring of smart composite structures using fiber Bragg grating sensor system

2001 ◽  
Author(s):  
Chun-Gon Kim ◽  
Chi-Young Ryu ◽  
Chang-Sun Hong ◽  
Hyun-Kyu Kang
Keyword(s):  
Fiber Bragg Grating ◽  
Composite Structures ◽  
Fiber Bragg Grating Sensor ◽  
Sensor System ◽  
Bragg Grating ◽  
Smart Composite ◽  
Strain Monitoring ◽  
Smart Composite Structures ◽  
Bragg Grating Sensor

Research on Temperature Compensation of the Fiber Bragg Grating Sensor and the Resistance Strain Gauge

2021 ◽  
Vol 16 (6) ◽  
pp. 1020-1027
Author(s):  
Feng Zhu ◽  
Min Liu ◽  
Chengjun Xu ◽  
Sheng Zou ◽  
Chentong Chen ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Strain Gauge ◽  
Temperature Compensation ◽  
Metal Structure ◽  
Resistance Strain ◽  
Fiber Bragg Grating Sensor ◽  
Bragg Grating ◽  
Resistance Strain Gauge ◽  
Strain Monitoring ◽  
Bragg Grating Sensor

The fiber Bragg grating sensor is widely used in strain monitoring of large metal structure and trend to replace the resistance strain gauge due to its advantages of strong stability, high measurement accuracy, multiple points measuring, strong environmental suitability and long transmission distance. The temperature-induced strain, which can have the same order of magnitudes as the mechanically-induced strain, will cause great errors in the strain monitoring. Therefore, the temperature compensation for the sensors is essential to guarantee the measurement accuracy. The existing theoretical models and experiment platforms for analyzing the temperature compensation are established by assuming that the testing temperature is constant. However, the surrounding temperature of some large metal structure is not stable, and the effect of temperature change cannot be neglected. This paper aims to establish an analytic model and an experiment platform to compare the temperature compensation of the fiber bragg grating sensor and the resistance strain gauge. The superiority of the temperature compensation for the fiber bragg grating sensor is verified. The result provides theoretical support for choosing the fiber bragg grating sensor in the long-time strain monitoring.

Dynamic assessment of women pelvic floor function by using a fiber Bragg grating sensor system

2006 ◽  
Author(s):  
Luis A. Ferreira ◽  
Francisco M. Araújo ◽  
Teresa Mascarenhas ◽  
Renato M. Natal Jorge ◽  
António A. Fernandes
Keyword(s):  
Pelvic Floor ◽  
Fiber Bragg Grating ◽  
Dynamic Assessment ◽  
Fiber Bragg Grating Sensor ◽  
Sensor System ◽  
Bragg Grating ◽  
Pelvic Floor Function ◽  
Floor Function ◽  
Bragg Grating Sensor

Longdistance Fiber Bragg Grating Sensor System Based on Time Division Multiplexing and Narrow Wavelength Swept Laser

2010 ◽  
Vol 39 (11) ◽  
pp. 2004-2007
Author(s):  
刘川 LIU Chuan ◽  
饶云江 RAO Yunjiang ◽  
冉曾令 RAN Zengling ◽  
封莎 FENG Sha
Keyword(s):  
Fiber Bragg Grating ◽  
Fiber Bragg Grating Sensor ◽  
Sensor System ◽  
Bragg Grating ◽  
Long Distance ◽  
Time Division Multiplexing ◽  
Time Division ◽  
Bragg Grating Sensor

A Novel Demodulation Method for Fiber Bragg Grating Sensor System Based on the LabView Software

2011 ◽  
Vol 403-408 ◽  
pp. 2364-2367
Author(s):  
Jun Su ◽  
Wei Qing Song ◽  
Hong Lin Chen ◽  
Xiu Feng Yang ◽  
Zheng Rong Tong ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Fiber Bragg Grating Sensor ◽  
Sensor System ◽  
Bragg Grating ◽  
Labview Software ◽  
Sensing System ◽  
Data Acquisition Card ◽  
Bragg Grating Sensor ◽  
Novel Design ◽  
Demodulation Method

The theory of fiber Bragg grating demodulation system based on unbalanced Mach-Zehnder (M-Z) interferometer is introduced. A novel design for demodulation of fiber Bragg grating sensor system based on the LabView Software is proposed and demonstrated. The system is obtained by making use of piezoelectric ceramic (PZT) technology achieving phase carrier modulation. Carrier signal is collected by data acquisition card(DAQ), and the phase modulation of signal is detected by discrete fourier transform(DFT). It realizes real-time demodulation for multiplexed sensing system.

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