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Title: Fiber grating moisture and chemical sensing system

Patent ·
OSTI ID:1531468
;

Fiber grating environmental measurement systems are comprised of sensors that are configured to respond to changes in moisture or chemical content of the surrounding medium through the action of coatings and plates inducing strain that is measured. These sensors can also be used to monitor the interior of bonds for degradation due to aging, cracking, or chemical attack. Means to multiplex these sensors at high speed and with high sensitivity can be accomplished by using spectral filters placed to correspond to each fiber grating environmental sensor. By forming networks of spectral elements and using wavelength division multiplexing arrays of fiber grating sensors may be processed in a single fiber line allowing distributed high sensitivity, high bandwidth fiber optic grating environmental sensor systems to be realized.

Research Organization:
US Department of Energy (USDOE), Washington, DC (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
FG03-99ER82753
Assignee:
Schulz, Whitten Lee, Fairview, OR (United States)
Patent Number(s):
6,683,297
Application Number:
10/457,845
OSTI ID:
1531468
Resource Relation:
Patent File Date: 2003-06-10
Country of Publication:
United States
Language:
English

References (10)

Health monitoring of an adhesive joint using a multiaxis fiber grating strain sensor system
  • Schulz, Whitten L.; Udd, Eric; Morrell, Mike
  • Nondestructive Evaluation Techniques for Aging Infrastructures & Manufacturing, SPIE Proceedings https://doi.org/10.1117/12.339906
conference January 1999
Method and apparatus for detecting hydrocarbon fuels in a vapor state with an absorber-expander member patent January 1995
Bolt, stud or fastener having an embedded fiber optic Bragg Grating sensor for sensing tensioning strain patent August 1999
Methods and apparatus for mechanically enhancing the sensitivity of transversely loaded fiber optic sensors patent April 2001
Advanced fiber-grating strain sensor systems for bridges, structures, and highways
  • Schulz, Whitten L.; Udd, Eric; Seim, John M.
  • 5th Annual International Symposium on Smart Structures and Materials, SPIE Proceedings https://doi.org/10.1117/12.310610
conference June 1998
Apparatus for detecting aqueous environments patent April 1998
Embedded optical sensor capable of strain and temperature measurement using a single diffraction grating patent March 1995
Progress on monitoring of adhesive joints using multiaxis fiber grating sensors
  • Schulz, Whitten L.; Udd, Eric; Seim, John M.
  • SPIE's 7th Annual International Symposium on Smart Structures and Materials, SPIE Proceedings https://doi.org/10.1117/12.388187
conference June 2000
Composite strengthening and instrumentation of the Horsetail Falls Bridge with long gauge length fiber Bragg grating strain sensors conference December 2017
Precision deformation mechanism and method patent June 1998

Cited By (6)

Method of dewatering in a continuous high internal phase emulsion foam forming process patent November 2016
Method of dewatering in a continuous high internal phase emulsion foam forming process patent November 2017
Fiber grating environmental sensing system patent May 2006
Generator protection system patent January 2012
Fluid detection with a spectrometer-on-a-chip patent October 2013
Generator protection system patent March 2012

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