Fibre Optic Two Polarization Interferometer With Unambiguous Digital Readout And Its Application As Remote Strain Sensor

1986 ◽  
Author(s):  
Norbert Furstenau
Keyword(s):  
Strain Sensor ◽  
Fibre Optic ◽  
Digital Readout ◽  
Polarization Interferometer

Active wavelength demodulation of Bragg fibre-optic strain sensor using acousto-optic tunable filter

1995 ◽  
Vol 31 (18) ◽  
pp. 1602-1603 ◽  
Author(s):  
T. Coroy ◽  
R.M. Measures ◽  
J.H. Belk ◽  
P.J. Ellerbrock
Keyword(s):  
Strain Sensor ◽  
Tunable Filter ◽  
Fibre Optic

FONI-SPATE: A new fibre optic stress/strain sensor, using a near-infrared variant of the SPATE effect

1994 ◽  
Vol 30 (19) ◽  
pp. 1619-1620
Author(s):  
J.P. Dakin ◽  
J.L. Cruz ◽  
P.A.S. Reed ◽  
I. Sinclair
Keyword(s):  
Near Infrared ◽  
Strain Sensor ◽  
Fibre Optic ◽  
Stress Strain

Residual Stress in a Polymer-Glued FBG Temperature-Compensated Sensor for Civil Engineering Applications

2006 ◽  
Vol 326-328 ◽  
pp. 789-792 ◽  
Author(s):  
Alan Kin Tak Lau ◽  
Ho Yin Au ◽  
Hang Yin Ling ◽  
Peter Kok Cheung Chan
Keyword(s):  
Residual Stress ◽  
Electromagnetic Interference ◽  
Strain Sensor ◽  
Steel Tube ◽  
Aerospace Engineering ◽  
Fibre Optic ◽  
Engineering Applications ◽  
Physical Size ◽  
Accuracy Of Measurement ◽  
Monitoring Devices

In recent years, embedded fibre-optic sensors as structural health monitoring devices have been widely used in both civil and aerospace engineering applications. Their small physical size and ability to immunize electromagnetic interference make them ideal sensing devices, which provide highly accurate and reliable strain and temperature measurements for structures. This paper presents a new designed temperature-compensated fibre-optic Bragg grating (TCS) strain sensor for imbedding into cement-based materials to measure their mechanical and thermal strains individually or simultaneously. However, the residual stress generated due to the constrained boundary of a steel tube that is used to protect the sensor, will influence the accuracy of measurement. Therefore, a theoretical model that is used to estimate this stress at different temperature conditions is discussed.

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