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1. (WO2019066800) USE OF FIBER OPTIC STRAIN SENSORS TO MONITOR FASTENER DAMAGE IN STRUCTURES
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Pub. No.: WO/2019/066800 International Application No.: PCT/US2017/053666
Publication Date: 04.04.2019 International Filing Date: 27.09.2017
IPC:
G01L 1/24 (2006.01)
G PHYSICS
01
MEASURING; TESTING
L
MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
1
Measuring force or stress, in general
24
by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis
Applicants:
SIKORSKY AIRCRAFT CORPORATION [US/US]; 6900 Main Street Stratford, Connecticut 06615, US
Inventors:
SARLASHKAR, Avinash V.; US
MEYER, Theodore S.; US
HARRIGAN, Matthew P.; US
Agent:
JALBERT, Karen A.; US
Priority Data:
Title (EN) USE OF FIBER OPTIC STRAIN SENSORS TO MONITOR FASTENER DAMAGE IN STRUCTURES
(FR) UTILISATION DE CAPTEURS DE CONTRAINTE À FIBRE OPTIQUE POUR SURVEILLER DES DOMMAGES DE FIXATION DANS DES STRUCTURES
Abstract:
(EN) A fastener health monitoring system includes a structure including a first component and a second component, one or more fasteners securing the first component to the second component, and an optical fiber arranged adjacent to the one or more fasteners. The fiber is configured to detect strain on the structure from the one or more fasteners. Strain patterns are derivable from sensed data from the optical fiber, and any deviation in strain value greater than a threshold value at a particular fiber position along the optical fiber is indicative of a missing, damaged, or loosened fastener amongst the one or more of fasteners corresponding to that particular fiber position.
(FR) La présente invention concerne un système de surveillance de bon état de fixation qui comprend une structure comprenant un premier composant et un deuxième composant, un ou plusieurs éléments de fixation fixant le premier composant au deuxième composant, et une fibre optique agencée en position adjacente à l'élément ou aux éléments de fixations. La fibre est configurée pour détecter une contrainte sur la structure provenant de l'élément ou des éléments de fixation. Des profils de contrainte peuvent être dérivés de données détectées à partir de la fibre optique, et tout écart de valeur de contrainte supérieur à une valeur de seuil à une position de fibre particulière le long de la fibre optique est indicatif d’un élément de fixation manquant, endommagé ou desserré parmi l'élément ou les éléments de fixation correspondant à cette position de fibre particulière.
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Designated States: AE, AG, AL, AM, AO, AT, AU, AZ, BA, BB, BG, BH, BN, BR, BW, BY, BZ, CA, CH, CL, CN, CO, CR, CU, CZ, DE, DJ, DK, DM, DO, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, GT, HN, HR, HU, ID, IL, IN, IR, IS, JO, JP, KE, KG, KH, KN, KP, KR, KW, KZ, LA, LC, LK, LR, LS, LU, LY, MA, MD, ME, MG, MK, MN, MW, MX, MY, MZ, NA, NG, NI, NO, NZ, OM, PA, PE, PG, PH, PL, PT, QA, RO, RS, RU, RW, SA, SC, SD, SE, SG, SK, SL, SM, ST, SV, SY, TH, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Office (AM, AZ, BY, KG, KZ, RU, TJ, TM)
European Patent Office (EPO) (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)