Journal
SENSOR REVIEW
Volume 39, Issue 4, Pages 522-524Publisher
EMERALD GROUP PUBLISHING LTD
DOI: 10.1108/SR-08-2018-0199
Keywords
Bending loss; Liquid level sensors; Plastic optical fibers
Categories
Funding
- National Nature Science Foundation of China [61377058]
- Nature Science Foundation of Shanxi Province [201701D221126]
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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.
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