Optical fibre bending sensor for vehicle weight detection

Jargus, Jan; Kepák, Stanislav; Čubík, Jakub; Bujdoš, David; Stolárik, Martin

doi:10.11159/iccste19.194

Cited by 4 publications

(4 citation statements)

References 16 publications

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“…These can be divided into intensity, spectral, distributed, and phase sensors [5]. Intensity sensors can be easily implemented in a defined part of the road (or railway track) and due to their design, the decrease in light intensity in the optical fiber is measured [6,7]. Intensity sensors can use the Faraday effect and measure the magnetic field; in this way an optical sensor can be created that works similarly to induction loops [8].…”

Section: Introductionmentioning

confidence: 99%

New approach for speed and direction measurement by fiber optic sensor

Cubik,

Nedoma,

Fajkus

et al. 2024

Specialty Optical Fibres VIII

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Traffic monitoring is the subject of scientific publications and technical solutions, primarily due to the need to optimize and increase traffic safety. There are many systems that can determine direction, velocity, or make vehicle classifications. These can be, for example, traditional camera systems, laser gates, LIDAR scanning, pneumatic sensors, or induction loops. A non-traditional approach is the use of optical fibers as a traffic sensor. Optical fiber sensors use different technologies, one of them being sensors that evaluate the phase change of light (interferometers). The enormous sensitivity of these sensors combined with electromagnetic inertia are promising parameters for deploying system in areas that may be disturbed by magnetic fields or require special security requirements. The focus of this research is an optical fiber sensor based on the Michelson interferometer. The paper deals with the sensitivity of the measuring arm when changing its arrangement. Different configurations of the measuring fiber arrangement in relation to the objects to be monitored lead to the construction of a monitoring system with properties useful for direction monitoring and velocity measurement. This paper deals with the asymmetric configuration of the measuring arm of an optical fiber interferometer. Experiments in outdoor vehicular traffic conditions together with frequency spectrum analysis investigate the usability of the measurement system. The system itself can be extended to classify the measured objects by analyzing the amplitude frequency spectrum and using machine learning.

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Section: Introductionmentioning

confidence: 99%

New approach for speed and direction measurement by fiber optic sensor

Cubik,

Nedoma,

Fajkus

et al. 2024

Specialty Optical Fibres VIII

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“…However, only up to 2 N of force was applied to this sensor before saturation. In [ 19 ], an optical fibre bending sensor is used to measure the weight of vehicles driving over a mat containing optical fibres in between grooved rubber plates. While there is a significant variation of the optical intensity passing through the fibre with applied load, there is no attempt made to calibrate the sensors for a quantifiable measure of the sensor weight response.…”

Section: Introductionmentioning

confidence: 99%

Design of a Flexible Weight Sensor Using Optical Fibre Macrobending

Funnell

Thomas

2023

Sensors

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A flexible weight sensor based on optical fibre macrobending loss, using 1550 nm wavelength light and small fibre bending path lengths is presented. An applied load depresses an impactor layer of cylindrical protrusions into a soft mat covered with optical fibre, causing the optical loss of the fibre to increase. An experimental study of two fibre types, two impactor materials, two impactor designs and a range of protrusion bend radii from 3 mm to 10 mm is shown. For weights greater than 2 kg, a linear response in optical loss (dB) is observed for an applied weight load in kg. The proportionality constant between loss and load, and thus the total amount of optical loss for up to 10 kg of weight load, can be tuned by changing the sensor physical parameters, shown here in ranges from 0.5 dB up to 25 dB.

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“…When we focus on physical principles based on optics, many of these sensors are based on interferometric measurements [5][6][7][8] and on the use of Bragg gratings [9][10][11][12]. Designs of compressive force and weight sensors that use the detection of changes in the intensity of optical power transmitted by an optical fiber are beginning to appear [13][14][15]. For example, the authors of paper [14] describe a sensor for detecting cars, which is composed of rubber bands with a defined structure and an optical fiber.…”

Section: Introductionmentioning

confidence: 99%

“…Designs of compressive force and weight sensors that use the detection of changes in the intensity of optical power transmitted by an optical fiber are beginning to appear [13][14][15]. For example, the authors of paper [14] describe a sensor for detecting cars, which is composed of rubber bands with a defined structure and an optical fiber. It can therefore be assumed that this principle can be used in the field of transport in the detection of automobiles and rail vehicles.…”

Section: Introductionmentioning

confidence: 99%

Measuring the pressure force by detecting the change in optical power intensity

Jargus

Kostelanský²,

Fridrich³

et al. 2022

Electro-Optical Remote Sensing XVI

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This article describes the research work in search of an optimized solution for the measurement of compressive force using the detection of the intensity of the optical power coupled into the optical fiber. In the experimental part of the research a product realized by 3D printing was used the outer case of which was made of FLEXFILL 98A material and the inner part was formed by a three-part PETG layer while the middle sensory part was changeable. This model was used to test different shapes of deformation elements in the variable part to find suitable configurations of the deformation plate. A standard 50/125 μm multimode graded index optical fiber was placed in the sensory part. It can be assumed that the results of this research can be used for the design of sensors based on the detection of changes in optical power intensity

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Optical fibre bending sensor for vehicle weight detection

Cited by 4 publications

References 16 publications

New approach for speed and direction measurement by fiber optic sensor

New approach for speed and direction measurement by fiber optic sensor

Design of a Flexible Weight Sensor Using Optical Fibre Macrobending

Measuring the pressure force by detecting the change in optical power intensity

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