Distributed strain measurement using BOTDR improved by taking account of temperature dependence of Brillouin scattering power

1997 ◽  
Author(s):  
T. Kurashima
Keyword(s):  
Temperature Dependence ◽  
Strain Measurement ◽  
Brillouin Scattering ◽  
Distributed Strain

Distributed strain sensing for structural monitoring applications

2000 ◽  
Vol 27 (5) ◽  
pp. 873-879 ◽  
Author(s):  
Michael DeMerchant ◽  
Anthony Brown ◽  
Jeff Smith ◽  
Xiaoyi Bao ◽  
Theodore Bremner
Keyword(s):  
Strain Measurement ◽  
Measurement Accuracy ◽  
Brillouin Scattering ◽  
Strain Sensor ◽  
Structural Monitoring ◽  
Strain Sensing ◽  
Fibre Optics ◽  
Laboratory Test Results ◽  
The University ◽  
Distributed Strain

Strain sensors are a valuable tool for assessing the health of structures. The University of New Brunswick, in conjunction with ISIS Canada, is developing a distributed fibre optic strain sensor based on Brillouin scattering. This sensor can provide a virtually unlimited number of measurement points using a single optical fibre. A description of the operating principles of the system is given, along with a summary of laboratory test results. Strain measurement accuracy as high as approximately ±11 µε has been demonstrated at 1 m spatial resolution. Spatial resolutions as short as 100 mm can be used, although with decreased strain measurement accuracy. Future development of the technology will include an enhancement allowing both strain and temperature to be measured simultaneously.Key words: strain sensor, fibre optics, distributed sensing, structural monitoring, Brillouin scattering.

Simultaneous temperature and strain measurement with combined spontaneous Raman and Brillouin scattering

2005 ◽  
Vol 30 (11) ◽  
pp. 1276 ◽  
Author(s):  
M. N. Alahbabi ◽  
Y. T. Cho ◽  
T. P. Newson
Keyword(s):  
Strain Measurement ◽  
Brillouin Scattering
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