Research on FBG Vibration Sensing Technology

2013 ◽  
Vol 391 ◽  
pp. 340-343
Author(s):  
Zhi Yang ◽  
Wei Liu ◽  
Ting An
Keyword(s):  
Fiber Bragg Grating ◽  
High Performance ◽  
Vibration Sensor ◽  
Fiber Grating ◽  
Key Technology ◽  
Sensing System ◽  
Vibration Detection ◽  
Sensing Technology ◽  
Vibration Sensing ◽  
Signal Demodulation

With the progress of fiber grating sensing technology, FBG gradually become high-performance vibration sensor and has been widely used in vibration detection. Vibration sensing signal demodulation is the key technology for fiber Bragg grating sensing system. This paper details several fiber grating vibration sensor demodulation techniques and gives experiment result.

scholarly journals Recent Progress in the Performance Enhancement of Phase-Sensitive OTDR Vibration Sensing System

2019 ◽  
Author(s):  
Romain Zinsou ◽  
Xin Liu ◽  
Yu Wang ◽  
Jianguo Zhang ◽  
Yuncai Wang ◽  
...  
Keyword(s):  
Recent Progress ◽  
Performance Enhancement ◽  
Signal To Noise Ratio ◽  
Vibration Sensor ◽  
Sensor System ◽  
Sensing System ◽  
Vibration Sensing ◽  
Signal Demodulation ◽  
Phase Signal ◽  
Phase Sensitive

Recently, the phase-sensitive OTDR (Φ-OTDR) based vibration sensor system has gained the focus of many researchers and some efforts have been undertaken to push further the limitations imposed on the performance of the Φ-OTDR sensor system. Then, progress in the different areas of its performance evaluation factors such as: improvement of the signal-to-noise ratio (SNR), spatial resolution (SR) in the sub-meter range, enlargement of the sensing range, frequency response bandwidth over the conventional limit and phase signal demodulation for quantitative measurement have been realized. This paper presents an overview of the recent progress in the Φ-OTDR based vibration sensing system in the different areas mentioned above.

A Multiple Fiber Grating Sensor System Using Code Division Multiple Access

2013 ◽  
Vol 765-767 ◽  
pp. 2444-2447 ◽  
Author(s):  
Wei Li ◽  
Yong Jia Zhang ◽  
Hong Qiao Wen
Keyword(s):  
Optical Fiber ◽  
Fiber Bragg Grating ◽  
Code Division Multiple Access ◽  
Multiple Access ◽  
Simulation Experiment ◽  
Fiber Grating ◽  
Sensing System ◽  
Fiber Grating Sensor ◽  
Fbg Sensors ◽  
Code Division Multiple

In order to increase the multiplying density of Fiber Bragg Grating (FBG) sensors, a novel FBG Sensing System based on CDMA technology has been developed. Simulation experiment indicates the CDMA technology combine with optical fiber grating sensing system together successfully. Furthermore, the system can distinguishes the FBG and enhance the FBG network band utilization.

VCSEL-based tilted fiber grating vibration sensing system

2011 ◽  
Author(s):  
Tuan Guo ◽  
Yu-Heng Huang ◽  
Bai-Ou Guan ◽  
Chao Lu ◽  
Hwa-Yaw Tam ◽  
...  
Keyword(s):  
Fiber Grating ◽  
Sensing System ◽  
Vibration Sensing

Fiber Bragg Grating Force Sensing System with Temperature Compensation Scheme

2013 ◽  
Vol 711 ◽  
pp. 486-490 ◽  
Author(s):  
Min Yuan Hsieh ◽  
Chia Chin Chiang ◽  
Jian Cin Chao
Keyword(s):  
Fiber Bragg Grating ◽  
Temperature Compensation ◽  
Force Sensing ◽  
Bragg Grating ◽  
Modulation Scheme ◽  
Fiber Grating ◽  
Average Temperature ◽  
Long Period ◽  
Sensing System ◽  
Period Fiber Grating

Current study presented a simple, temperature-insensitive fiber Bragg grating (FBG) force sensing system. It is based on an optical intensity modulation scheme with a corrugated long-period fiber grating (CLPFG) filter. The temperature effect of signal variation is about 6%. Through FBG temperature compensating scheme the average temperature sensitivity is improved obviously (0.06 mV/°C).

Noise Analysis of φ-OTDR Vibration Sensing System

2014 ◽  
Vol 687-691 ◽  
pp. 459-462
Author(s):  
Li Ma ◽  
Yong Qian Li
Keyword(s):  
Rayleigh Scattering ◽  
Noise Analysis ◽  
Vibration Sensor ◽  
Noise Amplitude ◽  
Matlab Simulation ◽  
High Noise ◽  
Sensing System ◽  
Effective Suppression ◽  
Vibration Sensing ◽  
Suppression Method

The interference principle of backscattering light in the optical fiber is analyzed theoretically and the sensing mechanism of φ-OTDR vibration sensor system is introduced briefly in this paper. The trace of backward Rayleigh scattering is obtained by MATLAB simulation, and it is compared to the scattering curve by experiment. The result shows that noise is inevitable in the experiment, and the desired signal is difficult to be detected for the high noise amplitude. For obtaining high SNR in the experiment, the compositions and causes of the noise is introduced and the effective suppression method are put forward.

Wavelength Shift Detection Methods Based on Cross-Correlation Analysis for Signal Demodulation of Fiber Bragg Grating Sensing System

2012 ◽  
Vol 239-240 ◽  
pp. 156-162
Author(s):  
Fan Yang ◽  
Biao Wei
Keyword(s):  
Correlation Analysis ◽  
Fiber Bragg Grating ◽  
Cross Correlation ◽  
Absolute Error ◽  
Bragg Grating ◽  
Wavelength Shift ◽  
Sensing System ◽  
Cross Correlation Analysis ◽  
Signal Demodulation ◽  
Shift Detection

In order to improve the signal demodulation performance of fiber Bragg grating (FBG) sensing system, a wavelength shift detection method based on cross-correlation analysis is proposed to improve the accuracy of the measurement. The simulation results indicate that the absolute error of the measurement can be between 2 pm - 3 pm within the range of SNR of 14 dB-7 dB. Under the condition with high SNR, the absolute error can be approximately reduced to 0.5 pm. Hence, this demodulation algorithm can reduce the influences of the noises effectively and help to further study the features of the FBG sensor demodulation system.

VCSEL-Based Tilted Fiber Grating Vibration Sensing System

2010 ◽  
Vol 22 (16) ◽  
pp. 1235-1237 ◽  
Author(s):  
Yuheng Huang ◽  
Tuan Guo ◽  
Chao Lu ◽  
Hwa-Yaw Tam
Keyword(s):  
Fiber Grating ◽  
Sensing System ◽  
Vibration Sensing
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