scholarly journals Wide Range Fiber Displacement Sensor Based on Bending Loss

2016 ◽  
Vol 2016 ◽  
pp. 1-5 ◽  
Author(s):  
Jinlei Zhao ◽  
Tengfei Bao ◽  
Tribikram Kundu
Keyword(s):  
Fiber Optic ◽  
Dynamic Range ◽  
Glass Fibers ◽  
Fiber Optic Sensor ◽  
Sensor System ◽  
Displacement Sensor ◽  
Optic Sensor ◽  
Wide Range ◽  
Crack Monitoring ◽  
Fiber Loop

A wide range fiber optic sensor system for displacement and crack monitoring is developed. In the proposed fiber optic sensor system, a number of fiber loops are formed from a single fiber and each fiber loop is used as a crack or displacement sensor. The feasibility and the dynamic range of the fiber sensor developed in this manner are investigated experimentally. Both glass fibers and plastic fibers are used in the experiments. Experimental results show that the new fiber optic sensor has a wide range (maximum range is 88 mm) and this sensor also has a high sensitivity for displacement and crack monitoring when an appropriate diameter of the fiber loop is selected as the sensor. Moreover, the proposed method is very simple and has low cost, so in situ application potential of the proposed sensor is high.

The hybrid wireless and fiber optic sensor system

2017 ◽  
Author(s):  
M. Mądry ◽  
Ł. Pajewski ◽  
E. Bereś-Pawlik
Keyword(s):  
Fiber Optic ◽  
Fiber Optic Sensor ◽  
Sensor System ◽  
Optic Sensor

Fiber optic sensor system for detection of organic contaminants in soil

1998 ◽  
Author(s):  
G. Nau ◽  
J. A. McVicker ◽  
Frank Bucholtz ◽  
Kenneth J. Ewing ◽  
Sandeep T. Vohra ◽  
...  
Keyword(s):  
Organic Contaminants ◽  
Fiber Optic ◽  
Fiber Optic Sensor ◽  
Sensor System ◽  
Optic Sensor

A fiber-optic sensor system for monitoring chlorinated hydrocarbon pollutants

Talanta ◽  
1994 ◽  
Vol 41 (12) ◽  
pp. 2189-2194 ◽  
Author(s):  
F.P. Milanovich ◽  
S.B. Brown ◽  
B.W. Colston Jr. ◽  
P.F. Daley ◽  
K.C. Langry
Keyword(s):  
Fiber Optic ◽  
Fiber Optic Sensor ◽  
Sensor System ◽  
Chlorinated Hydrocarbon ◽  
Optic Sensor

Ladar fiber optic sensor system for aircraft applications

1993 ◽  
Author(s):  
Gregory L. Abbas ◽  
Michael de la Chapelle ◽  
Fernando Dones ◽  
D. Martin ◽  
Charles R. Porter ◽  
...  
Keyword(s):  
Fiber Optic ◽  
Fiber Optic Sensor ◽  
Sensor System ◽  
Optic Sensor

Construction and Evaluation of the Fiber-Optic Sensor System for Chemical Vapor Detection

2008 ◽  
Vol 55-57 ◽  
pp. 509-512 ◽  
Author(s):  
M. Kittidechachan ◽  
I. Sripichai ◽  
W. Supakum ◽  
S. Thuamthai ◽  
Suppalak Angkaew ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Fiber Optic ◽  
Chemical Vapor ◽  
Fiber Optic Sensor ◽  
Sensor System ◽  
Laser Source ◽  
Vapor Concentration ◽  
Vapor Detection ◽  
Optic Sensor ◽  
Butyl Amine

The fiber optic sensor system for chemical vapor detection was desiged and constructed. The system consisted of three parts; the optic unit, the fiber-optic sensing head and the flow controlling unit. The optic unit included a He-Ne laser source which lazes a red laser into an aligned optical fiber, a photo detector, and a signal processing with computer interface controlled by the Labview® program version 7.1. The sensing head was made of a polyaniline thin film coated onto the de-cladded section of an optical fiber covered by a gas mixing cell. The concentration of measured gas was controlled by varying nitrogen gas flow rate. The nitrogen flow controller was set-up to obtain vapor concentration in the range of 0.04 to 0.40 % v/v. Vapors of hydrochloric acid (HCl) and n-butyl amine (a weak base) were used to test the performance of the sensor system. It was found that output intensity increases with an increasing HCl concentration and decreases with increasing n-butyl amine concentration. The response toward the amine vapor was faster than that of the HCl vapor (23 seconds for n-butyl amine and 72 seconds for HCl). Experiments performed at various concentrations of amine vapor (between 0.04 to 0.21 %v/v) found that a higher concentration yields faster response time.

Application of Fiber Optic BOTDA Sensor for Fire Detection in a Building

2006 ◽  
Vol 321-323 ◽  
pp. 212-216
Author(s):  
Il Bum Kwon ◽  
Chi Yeop Kim ◽  
Dae Cheol Seo
Keyword(s):  
Temperature Distribution ◽  
Optical Fiber ◽  
Fiber Optic ◽  
Smart Structures ◽  
Fire Detection ◽  
Fiber Optic Sensor ◽  
Sensor System ◽  
Real Time Processing ◽  
Optic Sensor ◽  
Electro Optic

Smart structures are to be possessed many functions to sense the external effects, such as seismic loads, temperature, and impact by some explosion, influenced on the safety of structures. This work was focused on the development of a sensing function of smart structures to get the temperature distribution on structures to detect fire occurrences. A fiber optic BOTDA (Brillouin Optical Time Domain Analysis) sensor system was developed to detect the fire occurrence by measuring the temperature distribution of a building’s exterior surfaces. This fiber optic sensor system was constructed with a laser diode and two electro-optic modulators, which made this system faster than systems using only one electro-optic modulator. The temperature distributed on an optical fiber can be measured by this fiber optic BOTDA sensor. An optical fiber, 1400 m in length, was installed on the surface of a building. Using real-time processing of the sensor system, we were able to monitor temperature distribution on the building’s surfaces, and changes in temperature distribution were also measured accurately with this fiber optic sensor.

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