Distributed sensing system
AssigneeSensornet Limited
InventorMahmoud Farhadiroushan
Life of this patent
Estimating the term…
Abstract
A system for measuring the strain in a structure in which the temperature at the location the strain is measured is also measured in which an optic fiber is incorporated in the structure which has an interferometer positioned at the point or points where the strain is to be measured. A pulse of light is sent down the fiber and the backscattered light is split to separate the Raman Scattered Spectrum light. The interferometer is used to measure the strain and the Raman Scattered Spectrum light is used to measure temperature and loss.
Claims21
A method for measuring strain and temperature at a location in a structure comprising:
- providing a structure including optical fibre,
- providing interferometer means positioned at a location along a length of the optical fibre where strain is to be measured,
- transmitting a pulse of light along the optical fibre and reflecting the light with the interferometer means wherein the reflected light includes scattered Raman Scatter Spectrum light,
- measuring the scattered Raman Scatter Spectrum light, and determining temperature from the measured Raman Scatter Spectrum light.
A sensing network comprising:
- a structure including at least one optical fibre,
- interferometer means positioned at a location along the optical fibre where strain is to be measured,
- means for transmitting a pulse of light along the optical fibre,
- means for detecting and measuring light reflected back from the interferometer means wherein the reflected light includes scattered Raman Scatter Spectrum light wherein the means for detecting and measuring light includes different channels for receiving the reflected light and scattered Raman Scatter Spectrum light and means for determining temperature from scattered Raman Scatter Spectrum light.
A method for measuring strain and temperature at a location in a structure comprising:
- providing an optical fibre,
- providing an interferometer positioned at a location along a length of the optical fibre where strain is to be measured,
- transmitting a pulse of light along the optical fibre and reflecting the light with the interferometer wherein the reflected light includes scattered Raman Scatter Secptrum light, and
- measuring the scattered Raman Scatter Spectrum light and determining temperature from the measured Raman Scatter Spectrum light.
A sensing network comprising:
- a structure including at least one optical fibre,
- an interferometer positioned at a location along the optical fibre where strain is to be measured,
- a light source which generates a pulse of light,
- a detecting and measuring assembly which receives light reflected back from the interferometer wherein the reflected light includes scattered Raman Scatter Spectrum light and wherein the detecting and measuring assembly includes different channels for receiving the reflected light and scattered Raman Scatter Spectrum light and a processor for determining temperature from the scattered Raman Scatter Spectrum light.
Dependencies are inferred from the claim text.