Improvement of measuring range in fiber interferometric liquid level sensor by employing digital filter for mode selectivity

2020 ◽  
Vol 62 (9) ◽  
pp. 3042-3050
Author(s):  
Asrul Izam Azmi ◽  
Ahmad Sharmi Abdullah ◽  
Muhammad Yusof Mohd Noor ◽  
Mohd Haniff Ibrahim ◽  
Usman Ullah Sheikh ◽  
...  
Keyword(s):  
Digital Filter ◽  
Liquid Level ◽  
Measuring Range ◽  
Mode Selectivity ◽  
Level Sensor ◽  
Liquid Level Sensor

scholarly journals Liquid level sensor based on dynamic Fabry–Perot interferometers in processed capillary fiber

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Pablo Roldán-Varona ◽  
Rosa Ana Pérez-Herrera ◽  
Luis Rodríguez-Cobo ◽  
Luis Reyes-González ◽  
Manuel López-Amo ◽  
...  
Keyword(s):  
Optical Fiber Sensor ◽  
Liquid Level ◽  
Hollow Core ◽  
Immiscible Liquids ◽  
Fabry Perot ◽  
Detection Mode ◽  
Level Sensor ◽  
Core Fiber ◽  
Liquid Level Sensor ◽  
Silica Capillary

AbstractIn this work, a novel optical fiber sensor capable of measuring both the liquid level and its refractive index is designed, manufactured and demonstrated through simulations and experimentally. For this, a silica capillary hollow-core fiber is used. The fiber, with a sensing length of 1.55 mm, has been processed with a femtosecond laser, so that it incorporates four holes in its structure. In this way, the liquid enters the air core, and it is possible to perform the sensing through the Fabry–Perot cavities that the liquid generates. The detection mode is in reflection. With a resolution of 4 μm (liquid level), it is in the state of the art of this type of sensor. The system is designed so that in the future it will be capable of measuring the level of immiscible liquids, that is, liquids that form stratified layers. It can be useful to determine the presence of impurities in tanks.

scholarly journals Light Path Model of Fiber Optic Liquid Level Sensor Considering Residual Liquid Film on the Wall

2015 ◽  
Vol 2015 ◽  
pp. 1-8
Author(s):  
Zhijun Zhang ◽  
Shiwei Zhang
Keyword(s):  
Liquid Film ◽  
Fiber Optic ◽  
Glass Tube ◽  
Path Model ◽  
Liquid Level ◽  
Residual Liquid ◽  
Light Refraction ◽  
Special Cases ◽  
Level Sensor ◽  
Liquid Level Sensor

The working principle of the refractive-type fiber optic liquid level sensor is analyzed in detail based on the light refraction principle. The optic path models are developed in consideration of common simplification and the residual liquid film on the glass tube wall. The calculating formulae for the model are derived, constraint conditions are obtained, influencing factors are discussed, and the scopes and skills of application are analyzed through instance simulations. The research results are useful in directing the correct usage of the fiber optic liquid level sensor, especially in special cases, such as those involving viscous liquid in the glass tube monitoring.

scholarly journals A plastic fiber optic liquid level sensor

2004 ◽  
Author(s):  
S. Vargas ◽  
Carmen Vazquez ◽  
Ana B. Gonzalo ◽  
Jose M. Pena
Keyword(s):  
Fiber Optic ◽  
Liquid Level ◽  
Level Sensor ◽  
Liquid Level Sensor

Simulation of fiber optic liquid level sensor demodulation system

2013 ◽  
Author(s):  
Cong-qin Yi ◽  
Yun Luo ◽  
Zheng-ping Zhang
Keyword(s):  
Fiber Optic ◽  
Liquid Level ◽  
Level Sensor ◽  
Liquid Level Sensor

Optical liquid level sensor based on cladding-mode resonance of specialty double-cladding fiber

2009 ◽  
Author(s):  
Huanhuan Liu ◽  
Fufei Pang ◽  
Na Chen ◽  
Zhenyi Chen ◽  
Tingyun Wang
Keyword(s):  
Liquid Level ◽  
Level Sensor ◽  
Cladding Mode ◽  
Liquid Level Sensor

Optical-fiber discrete liquid-level sensor for liquid nitrogen

2005 ◽  
Author(s):  
Sergei N. Khotiaintsev ◽  
Katya Romo-Medrano ◽  
Vladimir A. Svirid
Keyword(s):  
Optical Fiber ◽  
Liquid Nitrogen ◽  
Liquid Level ◽  
Level Sensor ◽  
Liquid Level Sensor

scholarly journals Liquid level sensor based on CMFTIR effect in polymer optical fiber

2016 ◽  
Vol 6 (4) ◽  
pp. 312-317 ◽  
Author(s):  
Yulong Hou ◽  
Wenyi Liu ◽  
Huixin Zhang ◽  
Shan Su ◽  
Jia Liu ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Liquid Level ◽  
Polymer Optical Fiber ◽  
Level Sensor ◽  
Liquid Level Sensor
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