scholarly journals A Multipoint Liquid Level Sensor Based on Two Twisted Polymer Optical Fibers in a Race-Track Helical Structure

2018 ◽  
Vol 2018 ◽  
pp. 1-4
Author(s):  
Yingzi Zhang ◽  
Yulong Hou ◽  
Yanjun Zhang ◽  
Liang Zhang ◽  
Yanjun Hu ◽  
...  
Keyword(s):  
Optical Fibers ◽  
Helical Structure ◽  
Measurement Range ◽  
Liquid Level ◽  
Polymer Optical Fiber ◽  
Passive Fiber ◽  
Level Sensor ◽  
Race Track ◽  
Polymer Optical Fibers ◽  
Liquid Level Sensor

A multipoint liquid level sensor based on the RI modulation of macrobend polymer optical fiber (POF) couplers is proposed. By twinning two twisted POFs around a race-track column, a series of U-shaped sensing heads are achieved. The output power in the passive fiber declines in a step form while the sensing heads are immersed into liquid in turn. The introduction of UV optical cement in the gap between two POFs improves the side-coupling ratio, increasing the attenuation per step. For the measurement range of 100 cm, the resolution is 2 cm. The sensor can differentiate different liquids with low temperature dependence.

scholarly journals An Optical Fiber Liquid Level Sensor Based on Side Coupling Induction Technology

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Yanjun Zhang ◽  
Yingzi Zhang ◽  
Yulong Hou ◽  
Liang Zhang ◽  
Yanjun Hu ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Optical Fibers ◽  
Cost Effective ◽  
Measurement Range ◽  
Liquid Level ◽  
Passive Fiber ◽  
Level Sensor ◽  
Polymer Optical Fibers ◽  
Liquid Level Sensor ◽  
Side Coupling

An optical fiber liquid level sensor based on two twisted polymer optical fibers twining around a racetrack column is demonstrated in this study. The side-coupling power of the passive fiber is modulated by the refractive index (RI) of the environment medium and decreases while the liquid level increases. The variation patterns of the side-coupling power in the bent section and the straight section form a step attenuation, which can improve the measurement range with a superior sensitivity and distinguish liquids with different RIs. Furthermore, the cost-effective sensor also shows good reversibility and low temperature-dependent properties.

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

Liquid level measurement based on multi-S-bend plastic optical fiber

Sensor Review ◽  
2019 ◽  
Vol 39 (4) ◽  
pp. 522-524 ◽  
Author(s):  
Ning Jing
Keyword(s):  
Optical Fiber ◽  
Measurement Range ◽  
Propagation Loss ◽  
Liquid Level ◽  
Plastic Optical Fiber ◽  
Content Type ◽  
Level Measurement ◽  
Level Sensor ◽  
Liquid Sensing ◽  
Liquid Level Sensor

Purpose This paper aims to propose a liquid level sensor with a multi-S-bend plastic optical fiber. Design/methodology/approach The principle of liquid sensing used is based on the leakage of higher modes out of the fiber and repeated regeneration in the following bend sections. Therefore, a propagation loss was introduced in every bend section of the fiber with the loss depending on the refractive index of the environment. Findings Therefore, a continue shift in the liquid level can be detected by observing changes in the propagation loss of the fiber. The sensor features compactness and a flexible resolution. Originality/value Compared with the exited ones, the sensor has capability of continue liquid measurement and a greater measurement range.

Design and Performance of Intensity Modulated Liquid-level Sensor Based on No-core Optical Fibers

2020 ◽  
Vol 49 (5) ◽  
pp. 506003
Author(s):  
冯德玖 FENG De-jiu ◽  
陈翠 CHEN Cui ◽  
冯文林 FENG Wen-lin ◽  
李邦兴 LI Bang-xing
Keyword(s):  
Optical Fibers ◽  
Liquid Level ◽  
Intensity Modulated ◽  
Level Sensor ◽  
And Performance ◽  
Liquid Level Sensor

scholarly journals Reflected Light Intensity-Modulated Continuous Liquid Level Sensor Based on Oblique End Face Coupling Optical Fibers

2020 ◽  
Vol 20 (8) ◽  
pp. 4229-4236
Author(s):  
Junfeng Ge ◽  
Xin Cheng ◽  
Chengrui Zhao ◽  
Kang Gui ◽  
Wei Zhang ◽  
...  
Keyword(s):  
Light Intensity ◽  
Optical Fibers ◽  
Liquid Level ◽  
Intensity Modulated ◽  
Reflected Light ◽  
Level Sensor ◽  
Liquid Level Sensor

Liquid-level sensor with optical fibers

1992 ◽  
Vol 31 (1) ◽  
pp. 51 ◽  
Author(s):  
Katsuharu Iwamoto ◽  
Isao Kamata
Keyword(s):  
Optical Fibers ◽  
Liquid Level ◽  
Level Sensor ◽  
Liquid Level Sensor

A Liquid Level Sensor Based on a Race-Track Helical Plastic Optical Fiber

2017 ◽  
Vol 29 (1) ◽  
pp. 158-160 ◽  
Author(s):  
Ning Jing ◽  
Chuanxin Teng ◽  
Jie Zheng ◽  
Guanjun Wang ◽  
Yuanyuan Chen ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Liquid Level ◽  
Plastic Optical Fiber ◽  
Level Sensor ◽  
Race Track ◽  
Liquid Level Sensor

Polymer optical fiber liquid level sensor: A Review

2021 ◽  
pp. 1-1
Author(s):  
Runjie He ◽  
Chuanxin Teng ◽  
Santosh Kumar ◽  
Carlos Marques ◽  
Rui Min
Keyword(s):  
Optical Fiber ◽  
Liquid Level ◽  
Polymer Optical Fiber ◽  
Level Sensor ◽  
Liquid Level Sensor
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