The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 10, 2002
Filed:
Sep. 20, 1999
Mark R. Fernald, Enfield, CT (US);
Timothy J. Bailey, Longmeadow, MA (US);
Matthew B. Miller, East Hartford, CT (US);
James M. Sullivan, Manchester, CT (US);
James R. Dunphy, South Glastonbury, CT (US);
Christopher J. Wright, Amston, CT (US);
Martin A. Putnam, Cheshire, CT (US);
Robert J. Maron, Cromwell, CT (US);
Richard T. Jones, Hamden, CT (US);
Guy A. Daigle, Plainville, CT (US);
John J. Grunbeck, Northford, CT (US);
Alan D. Kersey, South Glastonbury, CT (US);
Weatherford/Lamb, Inc., Houston, TX (US);
Abstract
A fused tension-based fiber grating pressure sensor includes an optical fiber having a Bragg grating impressed therein. The fiber is fused to tubes on opposite sides of the grating and an outer tube is fused to the tubes to form a chamber. The tubes and fiber may be made of glass. Light is incident on the grating and light is reflected from the grating at a reflection wavelength &lgr; . The grating is initially placed in tension as the pressure P increases, the tension on the grating reduced and the reflection wavelength shifts accordingly. A temperature grating may be used to measure temperature and allow for a temperature-corrected pressure measurement.