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Instruments 2017, 1(1), 7; https://doi.org/10.3390/instruments1010007

Universal Signal Conditioning Technique for Fiber Bragg Grating Sensors in PLC and SCADA Applications

1
School of Biomedical Sciences, The University of Western Australia, Perth, WA 6009, Australia
2
School of Engineering, RMIT University, Melbourne, VIC 3053, Australia
3
School of Science, Edith Cowan University, Perth, WA 6027, Australia
4
Centre for Communications and Electronics Research (CCER), School of Engineering, Edith Cowan University, Perth, WA 6027, Australia
*
Author to whom correspondence should be addressed.
Received: 2 October 2017 / Revised: 20 November 2017 / Accepted: 4 December 2017 / Published: 7 December 2017
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Abstract

Optical fibre sensors, such as Fibre Bragg Gratings (FBGs), are growing in their utilisation, although very niche in their applications. To enable a more diverse range of end users, expensive application-specific optical fibre interrogation hardware needs to be made compatible with and, ideally, easily incorporated into existing instrumentation and measurement hardware. The Programmable Logic Controller (PLC) is an ideal example of hardware used for data acquisition in many industries. As such, a module that can be connected into an existing PLC slot to collect data from electrically-neutral, EMI-immune and versatile FBG sensors is of significant advantage to the growing optical fibre sensing market. In this work, we show that both digital and analogue signals can be collected from FBG sensors and integrated seamlessly into the PLC-based control system using a transmit-reflect detection system. This technique enables fibre optic sensors to be compatible with standard industrial automation controllers in a relatively low cost and plug and play manner. View Full-Text
Keywords: programmable logic controller; fibre Bragg grating; distributed sensing; transmit-reflect detection programmable logic controller; fibre Bragg grating; distributed sensing; transmit-reflect detection
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Allwood, G.; Wild, G.; Hinckley, S. Universal Signal Conditioning Technique for Fiber Bragg Grating Sensors in PLC and SCADA Applications. Instruments 2017, 1, 7.

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