Low-Cost, High Sensitivity, Signal Processing-Enhanced Fiber Bragg Grating Sensing System for Condition-Based Maintenance Application

2011 ◽  
Vol 9 (4) ◽  
pp. 1415-1422
Author(s):  
Daniele Tosi ◽  
Guido Perrone
Keyword(s):  
Signal Processing ◽  
Fiber Bragg Grating ◽  
Low Cost ◽  
High Sensitivity ◽  
Condition Based Maintenance ◽  
Bragg Grating ◽  
Sensing System

Real Time Monitoring of Structural Health Using Fiber Bragg Grating Sensors Based on Arrayed Waveguide Grating Demultiplexing

2012 ◽  
Vol 226-228 ◽  
pp. 2062-2065
Author(s):  
Luan Xiong Chen ◽  
Wei Xu ◽  
Xu Guang Huang
Keyword(s):  
Fiber Bragg Grating ◽  
Low Cost ◽  
High Sensitivity ◽  
Bragg Grating ◽  
Arrayed Waveguide Grating ◽  
Distributed Sensors ◽  
Waveguide Grating ◽  
Strain Monitoring ◽  
Arrayed Waveguide ◽  
Channel Theory

In order to monitoring the health of the structure, a quasi-distributed fiber Bragg grating (FBG) interrogator based on two-channel theory of the arrayed waveguide grating (AWG) demultiplexer is presented. As is known, a slightly change of the temperature or strain or other related parameters applied on the FBG will lead to a shift of the Bragg wavelength of the FBG, which makes sense on the precisely temperature and strain monitoring of structures, including viaduct bridges, towers, railway, skyscraper, etc. It can be interrogated by the relative intensity of two-adjacent-channel of the AWG-based demultiplexer, which offers a low-cost, high sensitivity for the interrogation of FBG distributed sensors.

A High Sensitivity Pressure Sensing System with Fiber Bragg Grating Using the Transverse Strain Characteristics of a Straight Bourdon Tube

2005 ◽  
Vol 295-296 ◽  
pp. 539-544
Author(s):  
M.X. Jiao ◽  
E.G. Zhao ◽  
Y.M. Liu ◽  
R.L. Qi
Keyword(s):  
Fiber Bragg Grating ◽  
Applied Pressure ◽  
High Sensitivity ◽  
Bragg Grating ◽  
Transverse Strain ◽  
Bragg Wavelength ◽  
Pressure Sensing ◽  
Strain Characteristic ◽  
Sensing System ◽  
First Time

A high sensitivity pressure sensing system with a fiber Bragg grating (FBG) using the transverse strain characteristic of a straight bourdon tube (SBT) is presented and demonstrated for the first time to our knowledge. The transverse strain of the SBT makes the FBG tensioned. The pressure can be determined by measuring the shift of the Bragg wavelength. The experimentally obtained results indicate that the shift of the Bragg wavelength changes linearly with the applied pressure and the sensitive coefficients of pressure are approximately 6.22x10-3MPa-1. This represents a sensitivity value approximately 9.66x10-3pm/Pa. The pressure sensing system shows little hysteresis error.

Four years of soil strain monitoring on Etna Volcano Mount by means of a Three-axial Fiber Bragg Grating Sensor

2020 ◽  
Author(s):  
Umberto Giacomelli ◽  
Enrico Maccioni ◽  
Giorgio Carelli ◽  
Daniele Carbone ◽  
Salvatore Gambino ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
High Performance ◽  
Low Cost ◽  
High Sensitivity ◽  
Fiber Bragg Grating Sensor ◽  
Bragg Grating ◽  
Strain Behavior ◽  
Strain Monitoring ◽  
Soil Strain ◽  
Bragg Grating Sensor

<p>Rock strains detection is one of the principal ways to monitor geohazards. Classic strainmeters are cumbersome, hard to install and very expensive. Opto-electronics devices based on fiber Bragg grating technology allow to realize strainmeters with high sensitivity, low-cost, small volume and high performance.<br>We present the long term result of continuous soil strain monitoring on the Etna mount by a three-axial fiber Bragg grating sensor. The sensor has been developed in the framework of European Project MED-SUV (MEDiterranean SUpersite Volcanos). The installation site is a 8.5 meters deep borehole at a distance of about 7 km South-West from the summit craters of the Etna mount, at an elevation of about 1740 meters. This kind of sensor has a resolution better than 100 nanostrains on a daily timescale. Despite it is only a prototype, the sensor has worked for four years with a duty-cycle higher than 90% detecting both fast event, as earthquakes, and slow event, as epochal rocks strain behavior.</p>

scholarly journals Application of Traditional Graphic Elements Based on Fiber Bragg Grating Tactile Sensor Technology

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Jing Xu
Keyword(s):  
Fiber Bragg Grating ◽  
Electromagnetic Interference ◽  
Low Cost ◽  
High Sensitivity ◽  
Tactile Sensor ◽  
Sensor Technology ◽  
Bragg Grating ◽  
Tactile Sensing ◽  
External Interference ◽  
Sensing Technology

In today’s era, sensing technology has been very developed in the fields of machinery, medicine, safety monitoring, and so on. In order to be applicable to more fields, new sensing technologies are also evolving. Tactile and sensory states are two important indicators of human induction to external things. Based on the contact force information between fiber Bragg grating tactile sensor and human body, this paper uses a new fiber Bragg grating tactile sensing system to study the artistic elements of ink painting in modern graphic design. Subsequently, the structure and specific performances of the sensor experimental data are analyzed. With its small volume, low cost, high sensitivity, and good compatibility with the observed body, the new fiber Bragg grating tactile sensor will not be affected by external electromagnetic interference, various noise signals, complex integration, and other problems. According to the data observed by ink painters in this paper, the new tactile sensing technology of fiber Bragg grating can well control the external interference factors. In general, the technology is of great social and practical value.

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