Patent
Distributed optical pressure and temperature sensors
Carl W. Stoesz,Clark D. Boyd +1 more
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TLDR
In this article, a carrier for an optical fiber having a plurality of optical sensors located thereon is described, where the optical sensor is adhered to at least a part of the geometric discontinuity and the cavity may be filled with a liquid or a gel.Abstract:
Disclosed herein is a carrier for an optical fiber having a plurality of optical sensors located thereon. The carrier has a test section comprising a cavity and at least one geometric discontinuity, wherein in response to a pressure applied to the test section, a stress concentration is formed proximate to the geometric discontinuity, and wherein the optical sensor is adhered to at least a part of the geometric discontinuity. The cavity may be filled with a liquid or a gel. A temperature optical sensor may also be provided adjacent to the pressure optical sensor.read more
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Patent
Embedded optical sensor capable of strain and temperature measurement using a single diffraction grating
James R. Dunphy,Gerald Meltz,Mauro Varasi,Antonello Vannucci,Mario Signorazzi,Pietro Ferraro,Sabato Inserra Imparato,Claudio Voto +7 more
TL;DR: In this paper, an embedded optical sensor has a plurality of layers (10-20) and an optical fiber (21) with a fiber grating (28), disposed between the layers (14, 16).
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Patent
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TL;DR: A fiber grating pressure sensor as mentioned in this paper includes an optical sensing element (20, 600) which including an optical fiber (10), having a Bragg grating impressed therein which is encased within and fused to at least a portion of a glass capillary tube (20) and/or a large diameter waveguide grating (600) having a core and a wide cladding and which has an outer transverse dimension of at least 0.3 mm.
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Optical pressure monitoring system
TL;DR: In this paper, an optical pressure monitoring system includes a tube from an infusion set and an optical signal sensor disposed to detect changes in the diameter of the tube and thereby determine pressure changes within the tube.