scholarly journals A Medium-Frequency Fiber Bragg Grating Accelerometer Based on Flexible Hinges

Sensors ◽  
2021 ◽  
Vol 21 (21) ◽  
pp. 6968
Author(s):  
Zichuang Li ◽  
Lei Liang ◽  
Hui Wang ◽  
Shu Dai ◽  
Ke Jiang ◽  
...  
Keyword(s):  
Resonance Frequency ◽  
Fiber Bragg Grating ◽  
Temperature Effects ◽  
Bragg Grating ◽  
Structure Model ◽  
Frequency Range ◽  
Medium Frequency ◽  
Acceleration Sensors ◽  
Compensation Function ◽  
Sensing Characteristics

Mediumfrequency fiber Bragg grating (FBG) acceleration sensors are used in important applications in mechanical, aerospace and weapon equipment, and have strict requirements in terms of resonance frequency and sensitivity. A novel medium-frequency accelerometer, based on fiber Bragg grating and flexible hinges, is proposed in this paper. The differential structure doubles the sensitivity of the sensor while avoiding temperature effects. The structure model and principle for the sensor are introduced, the sensor’s sensing characteristics are theoretically analyzed, and the structure parameters for the sensor are determined through numerical analysis. The sensing experiments show that the resonance frequency of the sensor is approximately 2800 Hz, the sensitivity is 21.8 pm/g in the flat frequency range of 50–1000 Hz, and the proposed sensor has a good temperature self-compensation function and lateral anti-interference capability.

Ultrashort fiber Bragg grating written by femtosecond laser and its sensing characteristics

2017 ◽  
Vol 10 (4) ◽  
pp. 449-454 ◽  
Author(s):  
敬世美 JING Shi-mei ◽  
张轩宇 ZHANG Xuan-yu ◽  
梁居发 LIANG Ju-fa ◽  
陈超 CHEN Chao ◽  
郑钟铭 ZHENG Zhong-ming ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Fiber Bragg Grating ◽  
Bragg Grating ◽  
Sensing Characteristics

Radiation and High Temperature Effects on Regenerated Fiber Bragg Grating

2019 ◽  
Vol 37 (18) ◽  
pp. 4763-4769
Author(s):  
Thomas Blanchet ◽  
Rudy Desmarchelier ◽  
Adriana Morana ◽  
Aziz Boukenter ◽  
Youcef Ouerdane ◽  
...  
Keyword(s):  
High Temperature ◽  
Fiber Bragg Grating ◽  
Temperature Effects ◽  
Bragg Grating

Temperature and strain sensing characteristics of the tilted fiber Bragg grating

2010 ◽  
Vol 6 (5) ◽  
pp. 355-358 ◽  
Author(s):  
Wei-hua Zhang ◽  
Bao-he Yang ◽  
Zheng-rong Tong ◽  
Yin-ping Miao ◽  
Bo Liu ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Bragg Grating ◽  
Strain Sensing ◽  
Sensing Characteristics

Sensing Characteristics for a Fiber Bragg Grating Inscribed Over a Fiber Core and Cladding

2015 ◽  
Vol 27 (7) ◽  
pp. 709-712 ◽  
Author(s):  
Weijia Bao ◽  
Xueguang Qiao ◽  
Qiangzhou Rong ◽  
Naifei Hu ◽  
Hangzhou Yang ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
Bragg Grating ◽  
Fiber Core ◽  
Sensing Characteristics

scholarly journals New Method of Temperature and Strain Decoupling Based on Directivity of Fiber Bragg Grating Sensing

2021 ◽  
Vol 2101 (1) ◽  
pp. 012023
Author(s):  
Xiao Huang ◽  
Zhenkun Jin ◽  
Qing Shen
Keyword(s):  
Fiber Bragg Grating ◽  
Cantilever Beam ◽  
Experimental Analysis ◽  
Strain Measurement ◽  
The Other ◽  
New Method ◽  
Bragg Grating ◽  
Center Wavelength ◽  
Influence Of Temperature ◽  
Sensing Characteristics

Abstract Fiber Bragg Grating (FBG) has been widely used in temperature and strain measurement. Its center wavelength drift is affected by both temperature and strain. The influence of temperature and strain on center wavelength should be decoupled when measuring. In this paper, the sensing characteristics of FBG which pasted at different angles were simulated and analyzed, and it was found that FBG sensing for strain has strong directivity. A dual FBG composite construction based on the directivity of FBG sensing was proposed. Two FBGs were at an Angle of 62°. One FBG was sensitive to both temperature and strain, and the other was only sensitive to temperature. The structure can realize the decoupling of temperature and strain, and it doesn’t depend on feature of cantilever beam. It was verified by experimental analysis that the decoupling result was good by utilizing the combined FBG structure, and decoupling was realized easily.

scholarly journals Dual-parameter sensing characteristics of a single fiber Bragg grating half-pasted by 1C-LV epoxy under different curing

2021 ◽  
Vol 51 (3) ◽  
Author(s):  
Hong Li ◽  
Haoyue Zhang ◽  
Yanming Song ◽  
Fanyong Meng ◽  
Lianqing Zhu
Keyword(s):  
Fiber Bragg Grating ◽  
Experimental System ◽  
Single Fiber ◽  
Bragg Grating ◽  
Curing Conditions ◽  
Fbg Sensor ◽  
Novel Technology ◽  
Sensor Structure ◽  
Narrow Space ◽  
Sensing Characteristics

A novel technology for the simultaneous and independent measurement of dual parameters is proposed and experimented. By using a single fiber Bragg grating half-pasted by 1C-LV epoxy under different curing conditions, the sensor structure is designed such that the reflective single-peak spectrum splits into a twin-peak spectrum, which makes the FBG spectrum form a natural spectral peak splitting bias. A measurement limitation exists in the FBG sensor packaging at room temperature, which can be solved by the high-temperature cured packaging method. To verify the validity of the theory and methodology, the experimental system is used. In the range from –1000 to +1000 με and from 35 to 75°C, the Bragg wavelength change is relative linear to the strain and temperature. The temperature and strain variations can be independently and simultaneously measured using the split peak, and the deviations of the FBG sensor are ±1°C and ±5 με, respectively. This single FBG sensor can realize dual-parameter measurement, which is valuable for narrow-space health monitoring.

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