Results 111 to 120 of about 15,287 (227)

Development of a Multi-Level Displacement Sensor using Fiber Bragg Gratings (FBG)

Journal of MMIJ, 2010
When the structures such as rock slopes, underground caverns for the geological disposal of high level radioactive waste and underground power plants are constructed, the potential for displacement and damage in the surrounding rock mass is increased due to stress concentration and creep phenomenon. Therefore, the long-term monitoring of rock stability
Hiroyuki SANADA, Yutaka SUGITA, Shuji DAIMARU, Hiroya MATSUI, KASHIWAI Yoshio   +4 more
openaire   +2 more sources

Optimization of PS-FBG grating length for ultrasonic signal detection of partial discharge in oil-immersed transformers

International Journal of Electrical Power & Energy Systems
Ultrasonic sensors based on phase-shifted fiber Bragg gratings (PS-FBGs) are considered to have strong application potential in transformer partial discharge detection due to their high spectral slope characteristics.
ZHOU Hongyang, CHEN Yinhong, Cheng Jiawen, REN Zhengyu, TIAN Hong, ZHU Ting   +5 more
doaj   +1 more source

Using Embedded Fiber Bragg Grating (FBG) Sensors in Smart Aircraft Structure Materials

Procedia Engineering, 2012
AbstractThis paper describes the process of developing a smart material with monitoring application to the aircraft structures. A part of vertical stabilizer was selected and reproduced using carbon fiber honeycomb core sandwich panels. The sandwich panels reproduced were fabricated in accordance to the generic sandwich structure and aviation industry ...
Ramly, Ramzyzan, Kuntjoro, Wahyu, Rahman, Mohd. Kamil Abd.   +2 more
openaire   +1 more source

Analysis and Optimization of Thermodiffusion of an FBG Sensor in the Gas Nitriding Process

Micromachines, 2016
In this paper, we report the numerical calculations for a thermo-optical model and the temperature sensitivity of a fiber Bragg grating (FBG) sensor.
Tso-Sheng Hsieh, Yi-Chian Chen, Chia-Chin Chiang   +2 more
doaj   +1 more source

Residual strain monitoring during composite manufacturing [PDF]

, 2012
This work explores a new possibility in accurate measurement of multi-axial residual strains during the production of composite structures. It investigates the usability of the polarization dependent loss (PDL) of an optical fibre Bragg grating as a ...
Caucheteur, Christophe, Chah, Karima, Degrieck, Joris, Kinet, Damien, Lammens, Nicolas, Luyckx, Geert   +5 more
core   +1 more source

Fiber Bragg Grating (FBG) sensors as flatness and mechanical stretching sensors

, 2015
A novel approach which uses Fibre Bragg Grating (FBG) sensors has been utilised to assess and monitor the flatness of Gaseous Electron Multipliers (GEM) foils. The setup layout and preliminary results are presented.
Benussi, L., Et Al.
openaire   +1 more source

Acoustic Emission Measurement by Fiber Bragg Grating Glued to Cylindrical Sensor Holder

Advances in Materials Science and Engineering, 2014
Fiber Bragg grating (FBG) is an optical fiber sensor and is suitable for acoustic emission (AE) measurements of structures such as chemical plants that require water resistance, explosion proofing, and so forth, However, directionality has been a problem
Masanori Takuma, Shigeyoshi Hisada, Kenichi Saitoh, Yoshimasa Takahashi, Yuuki Kobayashi, Akira Kadono, Atushi Murata, Satoshi Iwata, Toshinori Sasaki   +8 more
doaj   +1 more source

Etched Fiber Bragg Grating Biosensor Functionalized with Aptamers for Detection of Thrombin

Sensors, 2018
A biosensor based on an etched Fiber Bragg Grating (EFBG) for thrombin detection is reported. The sensing system is based on a Fiber Bragg Grating (FBG) with a Bragg wavelength of 1550 nm, wet-etched in hydrofluoric acid (HF) for ~27 min, to achieve ...
Aliya Bekmurzayeva, Kanat Dukenbayev, Madina Shaimerdenova, Ildar Bekniyazov, Takhmina Ayupova, Marzhan Sypabekova, Carlo Molardi, Daniele Tosi   +7 more
doaj   +1 more source

Nanofibers with Bragg gratings from equidistant holes

, 2011
We study nanofibers with Bragg gratings from equidistant holes. We calculate analytically and numerically the reflection and transmission coefficients for a single grating and also for a cavity formed by two gratings.
Hakuta, K., Kien, Fam Le, Nayak, K. P.
core   +1 more source

Development of fiber Bragg grating (FBG) permanent sensor technology for borehole applications

SPIE Proceedings, 2004
A new downhole measurement technique has been proposed based on optical fiber Bragg grating (FBG) sensors for long-term monitoring of strain and its corresponding stress build-up in geological fault zones. Design and development of the present downhole sensor installation equipment have been demonstrated.
Schmidt-Hattenberger, C., Otto, P., Töpfer, M., Borm, G., Baumann, I.   +4 more
openaire   +3 more sources