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

Abstract

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.

Citation

Jing, N. (2019), "Liquid level measurement based on multi-S-bend plastic optical fiber", Sensor Review, Vol. 39 No. 4, pp. 522-524. https://doi.org/10.1108/SR-08-2018-0199