Fiber optic strain gage and carrier

Details Fiber optic strain gage and carrier Fiber optic strain gage and carrier

2007-11-15

2010-12-28

Caputo, Lisa M (Department: 2855)

Measuring and testing

Specimen stress or strain, or testing by stress or strain...

By loading of specimen

C385S013000

Reexamination Certificate

active

07856888

ABSTRACT:
The current invention relates to optical gages designed to measure strain on the surface of a test specimen. The gages of this invention is designed to be installed and used in a manner similar to conventional electronic foil strain gages, but to have the advantages of an all-optical gage. The gage of this invention is constructed to allow surface strain on the test specimen to be transferred to a length of optical fiber containing a fiber Bragg grating (FBG). As strain is applied to the fiber, the optical spectrum center wavelength reflected by the Bragg grating shifts in wavelength. This shift in wavelength can be converted directly to units of strain. The current invention provides a gage carrier design for use with fiber optic strain sensors comprising one or more FBGs which provide the benefits of a carrier for ease of handling and mounting without degrading gage performance. The gage carrier provides features that allow the FBG to be precisely positioned and securely bonded to the test specimen in a controlled manner. The carrier additionally provides fiber protection to the installed FBG.

REFERENCES:
patent: 4357072 (1982-11-01), Goodfellow et al.
patent: 4904046 (1990-02-01), Paschke et al.
patent: 4918305 (1990-04-01), Wlodarczyk et al.
patent: 5177806 (1993-01-01), Abbott et al.
patent: 5337387 (1994-08-01), Kramer et al.
patent: 5515473 (1996-05-01), Yamauchi et al.
patent: 5566671 (1996-10-01), Lyons
patent: 5658364 (1997-08-01), DeVore et al.
patent: 5664040 (1997-09-01), Kramer et al.
patent: 5745626 (1998-04-01), Duck et al.
patent: 5812251 (1998-09-01), Manesh
patent: 5896191 (1999-04-01), Beier et al.
patent: 5926599 (1999-07-01), Bookbinder et al.
patent: 6115122 (2000-09-01), Bao et al.
patent: 6122430 (2000-09-01), Bookbinder et al.
patent: 6125216 (2000-09-01), Haran et al.
patent: 6317555 (2001-11-01), Maron et al.
patent: 6349165 (2002-02-01), Lock
patent: 6449047 (2002-09-01), Bao et al.
patent: 6490931 (2002-12-01), Fernaid et al.
patent: 6517254 (2003-02-01), Hata et al.
patent: 6519388 (2003-02-01), Fernald et al.
patent: 6668105 (2003-12-01), Chen et al.
patent: 6726371 (2004-04-01), Nishita
patent: 6768825 (2004-07-01), Maron et al.
patent: 6788873 (2004-09-01), Fritz et al.
patent: 6834552 (2004-12-01), Thorsen
patent: 6915686 (2005-07-01), Baustad
patent: 6960028 (2005-11-01), Lampert
patent: 7060967 (2006-06-01), Thingbo et al.
patent: 7063466 (2006-06-01), Ferguson
patent: 7068869 (2006-06-01), Araujo et al.
patent: 7134219 (2006-11-01), Wood et al.
patent: 7137299 (2006-11-01), Meyer
patent: 7157693 (2007-01-01), Thingbo et al.
patent: 7379632 (2008-05-01), Twerdochlib
patent: 7398697 (2008-07-01), Allen et al.
patent: 2004/0083808 (2004-05-01), Rambow et al.
patent: 2004/0113306 (2004-06-01), Rapacki et al.
patent: 2004/0114850 (2004-06-01), Dewyntermarty et al.
patent: 2004/0223679 (2004-11-01), Pickrell et al.
patent: 2005/0042370 (2005-02-01), McManus et al.
patent: 2005/0050962 (2005-03-01), Zerwekh et al.
patent: 2005/0212675 (2005-09-01), Green
patent: 2006/0034559 (2006-02-01), Vidal et al.
patent: 2006/0103534 (2006-05-01), Arms et al.
patent: 2006/0153490 (2006-07-01), Araujo et al.
patent: 2006/0285813 (2006-12-01), Ferguson
patent: 2007/0056383 (2007-03-01), Deeg
patent: 2007/0090996 (2007-04-01), Wang
patent: 2007/0175628 (2007-08-01), Pearson
patent: 2007/0193362 (2007-08-01), Ferguson
patent: 2007/0236346 (2007-10-01), Helal et al.
patent: 09211348 (1997-08-01), None
“encapsulated.” The American Heritage® Dictionary of the English Language, Fourth Edition. 2003. Houghton Mifflin Company Feb. 2, 2010 <http://www.thefreedictionary.com/encapsulated>.
“enclosed.” The American Heritage® Dictionary of the English Language, Fourth Edition. 2003. Houghton Mifflin Company Feb. 2, 2010 <http://www.thefreedictionary.com/enclosed>.
Meltz, G. (1996) “Overview of Fiber Grating-Based Sensors,”Proc. SPIE2838:2-22.
Morey et al. (1989) “Fiber Optic Bragg Grating Sensors,”Proc. SPIE1169:98-107.
Morey, W.W. (1996) “Recent Advances in Fiber Grafting Sensors for Utility Industry Applications,”Proc. SPIE2594:90-98.
Patrick et al. (1996) “Hybrid Fiber Bragg Grating/Long Period Fiber Grating Sensor for Strain/Temperature Discrimination,”Photonics Technology Letters IEEE8(9):1223-1225.
Vengsarkar et al. (1996) “Long-Period Fiber Bragg Gratings as Band-Rejection Filters,”J. Lightwave Technol. 14(1):58-65.

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