Measuring and testing – Fluid pressure gauge – Photoelectric
Patent
1996-12-31
1998-06-16
Raevis, Robert
Measuring and testing
Fluid pressure gauge
Photoelectric
G02B 514
Patent
active
057674116
ABSTRACT:
A sensor system for sensing a measurand field within an environment includes an optical source, such as a light emitting diode, for providing broadband light to an array of serially coupled sensor elements disposed within an optical fiber. Each sensor element includes a fiber grating (Bragg grating) which, when illuminated, reflects a narrow band of light having a specified central wavelength. The optical fiber is deployed in a high strength hermetically sealed capillary tubing structure. Within the capillary tube, at least in the area of the sensor elements, the capillary tubing is filled with a high-density, low-compressibility, and high thermal conductivity material, such as a liquid, which completely fills all of the void spaces within the capillary tubing between the tubing and the sensor elements such that compressive forces which are exerted on the external surfaces of the tubing are accurately transmitted to the sensor element.
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CiDRA Corporation
Raevis Robert
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