An intrinsic optical-fiber position sensor with schemes for temperature compensation and resolution enhancement

1997 ◽  
Vol 15 (2) ◽  
pp. 261-266 ◽  
Author(s):  
Shiping Chen ◽  
B.T. Meggitt ◽  
A.W. Palmer ◽  
K.T.V. Grattan ◽  
R.A. Pinnock
Keyword(s):  
Optical Fiber ◽  
Temperature Compensation ◽  
Resolution Enhancement ◽  
Position Sensor ◽  
Fiber Position

A fluorescent linear optical fiber position sensor

2009 ◽  
Vol 31 (7) ◽  
pp. 1101-1104 ◽  
Author(s):  
P. Aiestaran ◽  
V. Dominguez ◽  
J. Arrue ◽  
J. Zubia
Keyword(s):  
Optical Fiber ◽  
Position Sensor ◽  
Linear Optical ◽  
Fiber Position

Long stroke optical fiber linear position sensor for the FLASH program

1996 ◽  
Author(s):  
Robert D. LaClair ◽  
William B. Spillman, Jr. ◽  
W. W. Kuhns ◽  
Mark S. Miller
Keyword(s):  
Optical Fiber ◽  
Position Sensor ◽  
Long Stroke

scholarly journals Monolithic Structure-Optical Fiber Sensor with Temperature Compensation for Pressure Measurement

Materials ◽  
2019 ◽  
Vol 12 (4) ◽  
pp. 552 ◽  
Author(s):  
Wenhua Wang ◽  
Xinlei Zhou ◽  
Weina Wu ◽  
Jihua Chen ◽  
Shenlong He ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Pressure Sensor ◽  
Temperature Compensation ◽  
Adhesive Bonding ◽  
Optical Fiber Sensor ◽  
Fused Silica ◽  
Deep Penetration ◽  
Seepage Pressure ◽  
Different Temperatures ◽  
The Difference

In this paper, an optical fiber pressure sensor cascading a diaphragm-assisted Fabry-Perot interferometer (FPI) and a fiber Bragg grating (FBG) is proposed and demonstrated. The sensor comprises an optical fiber, a fused-silica ferrule, and a fused-silica diaphragm. We use a femtosecond laser firstly to fabricate a pit on the end face of the ferrule and then investigate the laser heat conduction welding and deep penetration welding technology for manufacturing the seepage pressure sensor of the all-fused-silica material. We develop a sensor based on a monolithic structured FPI without adhesive bonding by means of all-laser-welding. The pressure characteristics of the sensor have good linearity at different temperatures. Also, the monolithic structured sensor possesses excellent resolution, hysteresis, and long-term stability. The environmental temperature obtained by the FBG is employed to compensate for the difference in seepage pressure at different temperatures, and the difference in seepage pressure responses at different temperatures is shown to be very small after temperature compensation.

Force-monitoring ring based on white-light interferometry for bridge cable force monitoring and its temperature compensation

2018 ◽  
Vol 22 (6) ◽  
pp. 1444-1452
Author(s):  
Shengyuan Li ◽  
Haifeng Lv ◽  
Yachuan Kuang ◽  
Nianchun Deng ◽  
Changsen Sun ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Fiber Bragg Grating ◽  
White Light ◽  
Temperature Compensation ◽  
Bragg Grating ◽  
White Light Interferometry ◽  
Comparison Results ◽  
Cable Force ◽  
Force Monitoring ◽  
Bridge Cable

This article proposes a novel white-light interference (WLI) force-monitoring ring for bridge cable force monitoring and temperature compensation. The WLI force-monitoring ring employs a sensing optical fiber wrapped around the outer surface of an elastomer to measure the expansion caused by applied load and temperature. By installing WLI force-monitoring ring between the anchor plate and the spherical plate of the cable, cable force can be captured by the sensing optical fiber and thus measured after temperature compensation. Based on white-light interferometry, two force-monitoring rings with resolution of 0.25 µ are designed. To find a route to temperature compensation, laboratory experiments are carried to study the effects of temperature on WLI force-monitoring ring both in free and forced states. Theoretical analysis and calibration experiments are implemented to verify the effectiveness of the proposed WLI force-testing ring, and the experiment results expose that the temperature-induced strain can be compensated using a WLI force-monitoring ring in free state. As a comparison, similar work is made for four fiber Bragg grating sensors attached to the elastomer evenly near the sensing optical fiber. The comparison results verify that the WLI method achieves better linear relation and repeatability than fiber Bragg grating. The WLI force-monitoring ring provides a high-precision and low-cost method for bridge cable force monitoring.

scholarly journals High-accuracy distributed temperature measurement using difference sensitive-temperature compensation for Raman-based optical fiber sensing

2019 ◽  
Vol 27 (25) ◽  
pp. 36183 ◽  
Author(s):  
Jian Li ◽  
Qian Zhang ◽  
Yang Xu ◽  
Mingjiang Zhang ◽  
Jianzhong Zhang ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Temperature Measurement ◽  
Temperature Compensation ◽  
High Accuracy ◽  
Fiber Sensing ◽  
Optical Fiber Sensing
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