An intensity-based fiber-optic liquid-level sensor for point measurement is described. The sensing principle is based on the total internal reflection of light, which is disturbed by contact with a
A liquid-level sensor based on the refractive-index sensitivity of long-period fiber-optic gratings is proposed and demonstrated. The form of the transmission spectrum of the long-period grating is
The liquid level sensor has a novel sensing mechanism and a simple structure. In theory, the sensing mechanism of the liquid level sensor is analyzed in detail. Experimentally, we fabricated a long
A novel (to the best of our knowledge) liquid level sensor based on multimode interference (MMI) effects is proposed and demonstrated. By using a multimode fiber (MMF) without cladding, known as no
We describe a fiber-optic system to measure the liquid level inside a container. The technique is based on the extraction of the temperature profile of
This paper presents a portable dual-point optical fiber sensor system for continuous liquid level measurement using polymer optical fibers (POFs). The system contains sensor design and
Abstract In this paper, we present a polymer optical fiber (POF) Bragg grating (FBG) to measure liquid level based on Archimides'' law of buoyancy. The sensor consists of polymer 3D
ABSTRACT A highly sensitive liquid level monitoring system based on microstructured polymer optical fiber Bragg grating (mPOFBG) array sensors is reported for the first time. The configuration is based
In this work, a versatile liquid level sensor using Femtosecond-Laser-Inscribed Fiber Bragg Gratings (high tensile strength) is designed and implemented for accurate measurement of liquid
A fiber-optic liquid-level sensor based on the bending of a fiber Bragg grating (FBG) is proposed. The FBG embedded in a cantilever rod such that the elongation and contraction of the
The working mechanism of liquid level sensor can be explained based on the schematic diagram of the sensor as shown in Fig. 1(a). The components of the sensor consist of a laser as light
The proposed device is able to perform real time and continuous liquid level measurements, and is characterized by sensing features (such as sensitivity and operating range)
Download scientific diagram | (a) Schematic experimental setup used for measuring liquid level using the optical fiber sensor. Liquid level was measured with a ruler
This paper describes the development of a liquid level sensor based on a fiber Bragg grating (FBG) written in 80-mu m diameter optical fiber for railway track differential settlement...
A schematic diagram of the proposed fiber-optic liquid-level sensor is shown in Fig. 1. The sensor consists of a water tank, polypropylene rod as a cantilever, FBG, and properly designed float.
This reflective sensor also exhibited at least 100-cm liquid level measurement capacity. The mechanism of the fluid-flow velocity sensor was based on analyzing the relationship among the
In order to measure the change of liquid level near the warning value, a new optical fiber fusion splicer was used to fabricate a fiber optic sensor for measuring liquid level based on long-period fiber grating
The article deals with the use of intensity-based fiber optic sensors for the level measurement. Two types of optical fiber sensors have been tested. In the first case the sensing
We describe a fiber-optic system to measure the liquid level inside a container. The technique is based on the extraction of the temperature profile of the fiber by using a fiber Bragg grating (FBG) array.
This paper presents the development and assessment of two types of Long Period Fiber Grating (LPFG)-based sensors including a mobile liquid level
In this paper, we present a fiber sensor using a fiber Bragg grating encapsulated in a half-polymer-filled metal cylinder for measuring liquid level variation. The operating mechanism of this novel design is
The design and packaging of simple, small, and low cost sensor heads, used for continuous liquid level measurement using uniformly thinned (etched) optical fiber Bragg grating
Fiber optic-based liquid-level sensors (FOLLSs) can work in harsh environments with inherent advantageous features that only optical fiber offers, such as intrinsic safety, resistance to
In addition, the fiber optic level sensor shows a stable and reproducible response over several cycles of 30 min duration at different liquid levels. The results demonstrate that this fiber optic
A fiber optic liquid level sensor based on the strain sensing by a fiber Bragg grating (FBG) is proposed and demonstrated. The FBG packaged on a thin cantilever beam so that the elongation and
Fiber Bragg grating (FBG) sensors have emerged as advanced tools for monitoring a wide range of physical parameters in various fields, including
A fiber Bragg grating liquid level sensor is presented by using a transmission shaft connected to the center of corrugated diaphragm and the free end of cantilever beam.
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