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US 8,135,245 B2Granted
Fiber optic sensing system
AssigneeGeneral Electric Company
InventorsRodrigo Rodriguez Erdmenger, Eric John Ruggiero, Alexander Kimberley Simpson, Christopher Edward Wolfe
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Abstract
A fiber optic sensing system comprises a housing disposed in a flow path, and a fiber optic sensor. The fiber optic sensor comprises an optical fiber secured in the housing, a Bragg grating, a light source for transmitting light to the optical fiber, and a detector for detecting light filtered by the Bragg grating of the optical fiber and monitoring wavelength changes of the detected light. The fiber is substantially perpendicular to the flow path. The housing defines an opening at an upstream side to allow flow through the flow path to exert a pressure on the optical fiber and cause a deformation of the Bragg grating.
Claims25
A fiber optic sensing system comprising:
- a housing disposed in a flow path;
- and
- a fiber optic sensor comprising:
- an optical fiber secured in the housing and comprising a Bragg grating, the fiber being substantially perpendicular to the flow path, wherein the housing defines an opening at an upstream side to allow flow through the flow path to exert a pressure on the optical fiber and cause a deformation of the Bragg grating;
- a light source for transmitting light to the optical fiber;
- and
- a detector for detecting light filtered by the Bragg grating of the optical fiber and monitoring wavelength changes of the detected light, wherein the housing comprises a substantially right-angled tunnel with an upstream channel in an initial flow direction of the flow path and a downstream channel substantially perpendicular to the upstream channel and having a downstream opening at a downstream end thereof.
4 more elements
A fiber optic sensing system comprising:
- a housing disposed in a flow path;
- and
- a fiber optic sensor comprising:
- an optical fiber secured in the housing and comprising a Bragg grating, the fiber being substantially perpendicular to the flow path, wherein the housing defines an opening at an upstream side to allow flow through the flow path to exert a pressure on the optical fiber and cause a deformation of the Bragg grating;
- a light source for transmitting light to the optical fiber;
- and
- a detector for detecting light filtered by the Bragg grating of the optical fiber and monitoring wavelength changes of the detected light,
- wherein the housing has a polygonal cross section, a tip of the polygonal cross section being generally directly facing the flow path, and at least one pair of sides,
- wherein the housing has a triangular cross section with a tip of the triangle substantially facing the flow path and pair of sides, and wherein first, second and third openings are defined in the tip and the pair of sides.
6 more elements
A fiber optic sensing system comprising:
- a housing disposed in a flow path;
- and
- a fiber optic sensor comprising:
- an optical fiber secured in the housing and comprising a Bragg grating, the fiber being substantially perpendicular to the flow path, wherein the housing defines an opening at an upstream side to allow flow through the flow path to exert a pressure on the optical fiber and cause a deformation of the Bragg grating;
- a light source for transmitting light to the optical fiber;
- and
- a detector for detecting light filtered by the Bragg grating of the optical fiber and monitoring wavelength changes of the detected light, wherein the fiber comprises a first section including a first Bragg grating for measurement of a differential pressure within the flow path, a second section including a second Bragg grating for measurement a total pressure within the flow path, and a third section including a third Bragg grating for measurement of a temperature within the flow path.
4 more elements
A fiber optic sensing system comprising:
- a housing disposed in a flow path;
- and
- a fiber optic sensor comprising:
- an optical fiber secured in the housing, being substantially perpendicular to the flow path, and comprising a first section including a first Bragg grating for measurement of a differential pressure within the flow path, a second section including a second Bragg grating for measurement a total pressure within the flow path, and a third section including a third Bragg grating for measurement of a temperature within the flow path,
- a light source for transmitting light through the fiber;
- and
- a detector for detecting light filtered by the Bragg gratings of the optical fiber and monitoring wavelength changes of the detected light.
4 more elements
A fiber optic sensing system comprising:
- a housing;
- and
- a fiber optic sensor comprising:
- an optical fiber having an upper end and a lower end secured in the housing, and a Bragg grating between the upper and lower ends, the fiber being substantially perpendicular to the flow path, wherein the housing defines an opening at an upstream side to allow flow through the flow path to exert a pressure on the optical fiber and cause a deformation of the Bragg grating;
- a light source for transmitting light to the optical fiber;
- and
- a detector for detecting light filtered by the Bragg grating of the optical fiber and monitoring wavelength changes of the detected light.
4 more elements
Dependencies are inferred from the claim text.