Design of a Flexible Weight Sensor Using Optical Fibre Macrobending

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 fibr...

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Main Authors: Funnell, Adam Christopher, Thomas, Peter James
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Language:English
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Fiber optical sensors
Fiber optiske sensorer
Fibre optic sensors
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Thomas, Peter James
description 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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subjects Fiber optical sensors
Fiber optiske sensorer
Fibre optic sensors
title Design of a Flexible Weight Sensor Using Optical Fibre Macrobending
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