Results 191 to 200 of about 7,750 (233)

Characterization of Fiber Bragg Grating (FBG) for Weight Measurement System

Applied Mechanics and Materials, 2023
Currently, FBG sensor has been developed in many applications due to its wavelength is sensitive to pressure change. This study aims to analyze the FBG wavelength shifting due to an applied load. In this research, the FBG was placed transversely right in the middle of the specimen that was made by using silicon rubber with thicknesses of 7 mm and 14 mm.
Nur Hidayah Fatimah, Dwi Hanto, Kacuk Cikal Nugroho, Muhammad Muhammad, Zuhdi Ismail, Rahmat Rahmat, Ainur Rosyida   +6 more
openaire   +1 more source

Temperature and refractive index sensing using a chirped tilted fiber Bragg grating (CTFBG) cascaded with a fiber Bragg grating (FBG)

Instrumentation Science and Technology
, Zhijun Gao
exaly   +2 more sources

Reflectivity measurement of weak fiber Bragg grating (FBG)

Journal of Wuhan University of Technology-Mater. Sci. Ed., 2012
One method based on the end-face reflection as a reference was used to measure weak grating reflectivity of 0.01%–1%. For measuring ultra-weak grating reflectivity, the grating group with an identical wavelength was used. By using anhydrous alcohol and deionized water as the reflecting medium, the singlepulse FBG reflectivity of a highly doped-Ge ...
Huiyong Guo, Yu Zheng, Jianguan Tang, Xiaofu Li, Haihu Yu, Hongqiao Wen, Desheng Jiang   +6 more
openaire   +1 more source

IDENTIFICATION OF TEMPERATURE SENSITIVITY DETECTOR ON FIBER BRAGG GRATING (FBG) SENSOR

Kontrol'. Diagnostika, 2022
The article presents the results of work on the study of the dependence of the results of temperature measurements using fiber Bragg gratings (FBGs). It was found that FBGs not only have different initial sensitivity, but also exhibit nonlinearity even in a narrow temperature range (from –30 to +70 °C).
V. A. Aniskovich, O. N. Budadin, S. O. Kozelskaya, Yu. G. Kutyurin, A. N. Rykov   +4 more
openaire   +1 more source

Application of the fiber Bragg grating (FBG) sensors in coal mines

SPIE Proceedings, 2013
The FBG strain sensors were applied to the Dongtan Mine to monitor the stress variation of the lined wall in the gateway retained along goaf of No. 3203 coal mining face on line. The results showed that the FBG strain sensor with high measuring range could measure the stress variation accurately during the support process of the gateway retained along ...
Jinyu Wang, Guang-Dong Song, Binxin Hu, Lianqing Li, Tongyu Liu   +4 more
openaire   +1 more source

Fiber Bragg grating (FBG) characterization and shaping by local pressure

Journal of Lightwave Technology, 2001
The spatial distribution of the chirp profile of a 4-cm-long nonuniform fiber Bragg grating (FBG) was studied with the exertion of local pressure on the fiber through the application of transverse force to a small grating section (/spl sim/0.3 mm).
C.J.S. de Matos, P. Torres, L.C.G. Valente, W. Margulis, R. Stubbe   +4 more
openaire   +1 more source

A study on fiber Bragg grating (FBG) strain sensor based on symmetrical lever structure

Review of Scientific Instruments, 2023
Thin-walled structure deformation detection technology is one of the key technologies for structural health monitoring and fault diagnosis of high-end mechanical equipment. Aiming at the problem that the existing Fiber Bragg Grating (FBG) strain sensor is difficult to effectively measure the deformation of thin-walled structures, an FBG strain sensor ...
Weihan Pang, Chao Ma, Lin Zhao, Hainan Yang, Wenhao Guo, Mingyu Lu   +5 more
openaire   +2 more sources

Investigation of fiber laser pulses by a fiber-Bragg-grating (FBG) spectrum analyzer

2003 Conference on Lasers and Electro-Optics Europe (CLEO/Europe 2003) (IEEE Cat. No.03TH8666), 2005
We prepared two fiber-Bragg-gratings (FBG)-arrays for the wavelength range 1074 - 1100 nm, both with a spectral width of 0.1 nm and a reflectivity of about 1% of the individual gratings so that pulses are investigated from an Yb fiber laser, Q-switched by an acousto-optical modulator with a repetition rate of 2.6 kHz. Using FBG-array the development of
S. Jetschke, V. Hugemann, U. Ropke, G. Shtyterman v. Langeweyde, K. Mori, H.-R. Muller   +5 more
openaire   +1 more source

Fiber Bragg grating (FBG) sensor systems for monitoring of dynamic structural loads

International Multi-Conference on Systems, Sygnals & Devices, 2012
Within the scope of an ESA-funded project the capabilities of fiber optic measurement systems for structural monitoring during launcher lift-off are evaluated. Measurement tasks like monitoring of dynamic processes like structural vibrations during launcher lift off clarify the need for highly robust interrogators that allow measurements at high ...
Thorbjörn C. Buck, Mathias S. Müller, Alexander W. Koch   +2 more
openaire   +1 more source

Research on measurement for bending stress of gear with Fiber Bragg Grating (FBG) and optimization of FBG probe installation

2015 12th International Conference on Ubiquitous Robots and Ambient Intelligence (URAI), 2015
With the rapid development of robot technology, more and more intelligent robots serve for people in many fields. The gear is important for many robots, teeth root bending stress is one of the gear strength indexes, so measuring teeth root bending stress is very important. Photo elastic method and electrical method have been generally applied. However,
Xindan Zhao, Hang Niu, Xiaodong Zhang 0023   +2 more
openaire   +1 more source