scholarly journals Development of real‐time vibration measurement system by fiber Bragg gratings with pulse light

2020 ◽  
Vol 103 (11-12) ◽  
pp. 9-15
Author(s):  
Tatsuya Yamaguchi ◽  
Yamato Sugimoto ◽  
Yukitaka Shinoda
Keyword(s):  
Real Time ◽  
Measurement System ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Vibration Measurement ◽  
Pulse Light

scholarly journals Bi-Dimensional Deflection Estimation by Embedded Fiber Bragg Gratings Sensors

Proceedings ◽  
2019 ◽  
Vol 15 (1) ◽  
pp. 3
Author(s):  
Palma ◽  
Palumbo ◽  
Pietra ◽  
Canale ◽  
Alviggi ◽  
...  
Keyword(s):  
Real Time ◽  
Fiber Bragg Gratings ◽  
Beam Theory ◽  
Bragg Gratings ◽  
Strain Sensors ◽  
Structural Monitoring ◽  
Direct Measure ◽  
Large Structure ◽  
Good Agreement ◽  
Classical Beam Theory

In this work, we present and discuss on the deflection estimation of a bi-dimensional panel by using Fiber Bragg Gratings (FBGs) as strain sensors embedded in the structure and a method based on the classical beam theory. The existing difficulties in the direct measure of the deflection are overcome thanks to the proposed technique and a real-time indirect structural monitoring is possible both on small and large structure. In many tests the estimated deflection with the proposed method has been compared with direct deflection measurements obtained with a mechanical comparator showing good agreement. A resolution of few tens of microns over a surface of the order of 1 m2 has been reached.

CGH-based real-time analysis of fiber Bragg gratings in few mode LMA fibers

2012 ◽  
Author(s):  
Markus Mundus ◽  
Jens U. Thomas ◽  
Christian Voigtländer ◽  
Ria G. Becker ◽  
Cesar Jauregui ◽  
...  
Keyword(s):  
Real Time ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Time Analysis ◽  
Real Time Analysis

All-optical real-time monitoring of air/vacuum valves in water pipeline systems using fiber Bragg gratings

2021 ◽  
Vol 44 (1) ◽  
Author(s):  
Genivaldo A. de Aquino ◽  
Yvone de F. L. De Lucca ◽  
Thiago D. Cabral ◽  
Pedro M. Lazari ◽  
André L. S. S. Martim ◽  
...  
Keyword(s):  
Real Time ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Real Time Monitoring ◽  
All Optical ◽  
Pipeline Systems ◽  
Water Pipeline

Fiber Bragg gratings-based sensing for real-time needle tracking during MR-guided brachytherapy

2016 ◽  
Vol 43 (10) ◽  
pp. 5288-5297 ◽  
Author(s):  
Maxence Borot de Battisti ◽  
Baudouin Denis de Senneville ◽  
Metha Maenhout ◽  
Jan J. W. Lagendijk ◽  
Marco van Vulpen ◽  
...  
Keyword(s):  
Real Time ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings

scholarly journals Design and Analysis of a Combined Strain–Vibration–Temperature Sensor with Two Fiber Bragg Gratings and a Trapezoidal Beam

Sensors ◽  
2019 ◽  
Vol 19 (16) ◽  
pp. 3571 ◽  
Author(s):  
Kun Yao ◽  
Qijing Lin ◽  
Zhuangde Jiang ◽  
Na Zhao ◽  
Gang-Ding Peng ◽  
...  
Keyword(s):  
Temperature Sensor ◽  
Strain Measurement ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
The Other ◽  
Vibration Measurement ◽  
Main Beam ◽  
Nonlinearity Error ◽  
Individual Strain ◽  
Combined Sensor

A combined sensor to simultaneously measure strain, vibration, and temperature has been developed. The sensor is composed of two Fiber Bragg gratings (FBGs) and a vibration gainer. One FBG is used to measure strain, while the other measures vibration and temperature. The gainer has a mass block which is used to increase its sensitivity to vibration. The main beam of the vibration gainer was designed as a trapezoid in order to reduce the strain gradient while sensing vibration. In addition, an interrogation method was used to eliminate interactions between measured parameters. Experiments were carried out to analyze the performance of the proposed sensor. For individual strain measurement in the range of 0–152 με, the sensitivity and nonlinearity error were 1.878 pm/με and 2.43% Full Scale (F.S.), respectively. For individual temperature measurement in the range of 50–210 °C, the sensitivity and nonlinearity error were 29.324 pm/°C and 1.88% F.S., respectively. The proposed sensor also demonstrated a sensitivity of 0.769 pm/m·s−2 and nonlinearity error of 1.83% F.S. for vibration measurement in the range of 10–55 m/s2. Finally, simultaneously measuring strain, temperature, and vibration resulted in nonlinearity errors of 4.23% F.S., 1.89% F.S., and 2.23% F.S., respectively.

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