Next Article in Journal
Covariance-Based Direction-of-Arrival Estimation of Wideband Coherent Chirp Signals via Sparse Representation
Next Article in Special Issue
Characterization of Flexible Copolymer Optical Fibers for Force Sensing Applications
Previous Article in Journal
A Sparse Representation-Based Deployment Method for Optimizing the Observation Quality of Camera Networks
Sensors 2013, 13(9), 11476-11489; doi:10.3390/s130911476
Article

A Noncontact Force Sensor Based on a Fiber Bragg Grating and Its Application for Corrosion Measurement

 and
*
Received: 22 July 2013 / Revised: 16 August 2013 / Accepted: 27 August 2013 / Published: 29 August 2013
View Full-Text   |   Download PDF [830 KB, uploaded 21 June 2014]   |   Browse Figures

Abstract

A simple noncontact force sensor based on an optical fiber Bragg grating attached to a small magnet has been proposed and built. The sensor measures the force between the magnet and any ferromagnetic material placed within a few millimeters of the sensor. Maintaining the sensor at a constant standoff distance, material loss due to corrosion increases the distance between the magnet and the corroded surface, which decreases the magnetic force. This will decrease the strain in the optical fiber shifting the reflected Bragg wavelength. The measured shift for the optical fiber used was 1.36 nm per Newton. Models were developed to optimize the magnet geometry for a specific sensor standoff distance and for particular corrosion pit depths. The sensor was able to detect corrosion pits on a fuel storage tank bottom with depths in the sub-millimeter range.
Keywords: fiber Bragg grating; magnetic force sensor; photonic force sensor; internal corrosion fiber Bragg grating; magnetic force sensor; photonic force sensor; internal corrosion
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.

Share & Cite This Article

Further Mendeley | CiteULike
Export to BibTeX |
EndNote
MDPI and ACS Style

Pacheco, C.J.; Bruno, A.C. A Noncontact Force Sensor Based on a Fiber Bragg Grating and Its Application for Corrosion Measurement. Sensors 2013, 13, 11476-11489.

View more citation formats

Related Articles

Article Metrics

For more information on the journal, click here

Comments

Cited By

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert