Experimental system for testing the optical fiber proximity sensor heads and for automated measurements with their applications

1995 ◽  
Author(s):  
Jerzy K. Gajda ◽  
Andrzej Niesterowicz
Keyword(s):  
Optical Fiber ◽  
Experimental System ◽  
Proximity Sensor ◽  
Automated Measurements

scholarly journals Distributed fluorescent optical fiber proximity sensor: Towards a proof of concept

2018 ◽  
Vol 198 ◽  
pp. 7-18 ◽  
Author(s):  
Ramona Gălătuș ◽  
Paul Faragó ◽  
Piotr Miluski ◽  
Juan-Antonio Valles
Keyword(s):  
Optical Fiber ◽  
Proof Of Concept ◽  
Proximity Sensor

scholarly journals Influence of Initial Phase Modulation on the Sensitivity of the Optical Fiber Sagnac Acoustic Emission Sensor

2019 ◽  
Vol 9 (5) ◽  
pp. 1018
Author(s):  
Zhuming Cheng ◽  
Jie Zeng ◽  
Dakai Liang ◽  
Chen Chang ◽  
Bing Wang
Keyword(s):  
Acoustic Emission ◽  
Optical Fiber ◽  
Initial Phase ◽  
Experimental System ◽  
Phase Sensitivity ◽  
Acoustic Emission Sensor ◽  
Alloy Plate ◽  
Practical Applications ◽  
Sensing System ◽  
Good Agreement

Improving the phase sensitivity of the optical fiber Sagnac sensor is very important for accurately detecting weak signals of acoustic emission. Theoretical analysis shows that the initial phase of the sensor is π under ideal conditions, and the maximum phase sensitivity is obtained when the bias phase is π/2. In this work, an experimental system was built with an aluminum alloy plate as the experimental object. The initial phase of the sensor was modulated by a Y-branch waveguide, and the fitting curve of the experimental data was in good agreement with the curve of the numerical simulation. Moreover, our experiments show there was a single value for the bias phase of π/2, which significantly deviated from the theoretical value. The results show that the greatest phase sensitivity of the sensor not only could be increased by nearly nine times through modulating the initial phase, but also could suppress the harmonic interferences in the sensing system. This study can provide a useful reference for improving the phase sensitivity of the optical fiber Sagnac AE sensor in practical applications.

Optical Fiber Proximity Sensor for Micro Distance Measurement

2020 ◽  
Author(s):  
N. M. Razali ◽  
W. A. N. W. Darman ◽  
P. N. S. S. Ja'afar ◽  
A. Hamzah ◽  
H. M. Kaidi ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Distance Measurement ◽  
Proximity Sensor

Research on Dual Bellows FBG Pressure Sensor

2013 ◽  
Vol 336-338 ◽  
pp. 239-243 ◽  
Author(s):  
Wen Long Yang ◽  
Yan Ling Xiong ◽  
Qiao Yi Li ◽  
Xue Ming Jin ◽  
Li Wang
Keyword(s):  
Optical Fiber ◽  
Fiber Bragg Grating ◽  
Correlation Coefficient ◽  
Pressure Sensor ◽  
Experimental System ◽  
Sensitivity Coefficient ◽  
Experimental Results ◽  
Pressure Sensitivity ◽  
Measuring Range ◽  
Better Than

A metalized FBG pressure sensor encapsulated by dual bellows structure was designed based on the strain characteristics of optical fiber Bragg grating (FBG) and osmotic sensing principle. And the experimental system of dual bellows FBG pressure sensor is established. The experimental results show that the pressure sensitivity coefficient of dual bellows FBG pressure sensor is 184.98nm/MPa with the measuring range 10 kPa. The correlation coefficient is better than 99.9% and the resolution is up to 0.05% full scale (FS). The sensitivity of dual bellows structure is high, which indicate that the dual bellows structure encapsulation is suitable for the sensoring in small measuring range.

An Optical Fiber Proximity Sensor for Haptic Exploration

2007 ◽  
Author(s):  
Sean Walker ◽  
Kevin Loewke ◽  
Michael Fischer ◽  
Carl Liu ◽  
J. Kenneth Salisbury
Keyword(s):  
Optical Fiber ◽  
Proximity Sensor ◽  
Haptic Exploration
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