High performance fiber optic sensor based on self referenced FBGs and high-speed dual-wavelength pulse coding

2015 ◽  
Author(s):  
Farhan Zaidi ◽  
Tiziano Nannipieri ◽  
Fabrizio Di Pasquale
Keyword(s):  
High Speed ◽  
High Performance ◽  
Fiber Optic ◽  
Dual Wavelength ◽  
Fiber Optic Sensor ◽  
Optic Sensor ◽  
High Performance Fiber

Fiber optic sensor for the measurement of concentration of silica in water with dual wavelength probing

2010 ◽  
Vol 81 (3) ◽  
pp. 035111 ◽  
Author(s):  
Benjamin Varghese P ◽  
Satish John ◽  
K. N. Madhusoodanan
Keyword(s):  
Fiber Optic ◽  
Dual Wavelength ◽  
Fiber Optic Sensor ◽  
Optic Sensor

Laboratory investigation on Fabry-Perot sensor and conventional extensometers for strain measurement in high performance concrete

2000 ◽  
Vol 27 (5) ◽  
pp. 1088-1093 ◽  
Author(s):  
Marco Quirion ◽  
Gérard Ballivy
Keyword(s):  
High Performance ◽  
Fiber Optic ◽  
High Performance Concrete ◽  
Fiber Optic Sensor ◽  
Vibrating Wire ◽  
Thermal Tests ◽  
Optic Sensor ◽  
Wire Strain ◽  
Fabry Perot ◽  
Concrete Cylinders

Advances in fiber optic sensing technology have made possible the installation of an extremely precise and reliable sensor in small structural members. Because of the high sensitivity and fast response of the sensor, low strain and dynamic strain can be measured. In this study, a Fabry-Perot strain sensor was cast in a high performance concrete cylinder, which had been submitted to simple compression and thermal tests. These results were compared with measurements obtained using external linear variable differential transformers fixed on concrete samples having the same composition as the fiber optic instrumented concrete cylinder. Comparisons were also done with results from tests on concrete cylinders instrumented with embedment vibrating wire and electrical strain gauges. In addition, thermal tests were performed on the different concrete cylinders and samples in order to compare the behaviour of the different sensors in high performance concrete submitted to temperature variations. The results show that the concrete strains measured with the Fabry-Perot sensor are in agreement with strain measurements made on concrete samples. Consequently, the presence of the embedded fiber optic sensor does not influence greatly the mechanical properties of concrete. Furthermore, for high stress levels (0.4 f 'c) and rapid stress changes (0.25 MPa/s), the fiber optic sensor measures with higher accuracy the strains of high performance concrete than the vibrating wire strain gauge.Key words: high performance concrete, sensor, vibrating wire, strain, extensometer, Fabry-Perot, fiber optic, instrumentation.

Measurement and Theoretical Analysis of Elastic Locus of High-Speed Mechanism

1992 ◽  
Author(s):  
Hui-jun Zou ◽  
L. Wang ◽  
R. Kovacevic
Keyword(s):  
Theoretical Analysis ◽  
High Precision ◽  
Dynamic Characteristics ◽  
High Speed ◽  
Fiber Optic ◽  
Fiber Optic Sensor ◽  
Challenging Problem ◽  
Optic Sensor ◽  
On Line ◽  
Machine Speed

Abstract With increase of machine speed, the influence of elastic components on dynamic characterises has become a very challenging problem. In our paper, we use self-made fiber-optic sensor on-line to detect the elastic locus. The sensor has highly transmitting and collecting light properties so that steady elastic locus has high precision and distinguishabilty. A theoretical analysis has been conducted using our program KEDL. The conclusions reveal more information about the dynamic characteristics of high-speed mechanisms.

High-performance hybrid Raman/fiber Bragg grating fiber-optic sensor based on simplex cyclic pulse coding

2013 ◽  
Vol 38 (4) ◽  
pp. 471 ◽  
Author(s):  
M. Taki ◽  
F. Zaidi ◽  
I. Toccafondo ◽  
T. Nannipieri ◽  
A. Signorini ◽  
...  
Keyword(s):  
Fiber Bragg Grating ◽  
High Performance ◽  
Fiber Optic ◽  
Fiber Optic Sensor ◽  
Bragg Grating ◽  
Optic Sensor
Sign in / Sign up

Export Citation Format

Share Document