US 12,067,709 B2
Expansion coefficient determination with deformation measurement and simulation
Markus Frewein, Leoben (AT); Maike Sagerer, Leoben (AT); Julia Zuendel, Leoben (AT); and Thomas Krivec, Zeltweg (AT)
Assigned to AT&S Austria Technologie & Systemtechnik AG, Leoben (AT)
Filed by AT & S Austria Technologie & Systemtechnik AG, Leoben (AT)
Filed on Aug. 30, 2021, as Appl. No. 17/461,595.
Claims priority of application No. 20194020 (EP), filed on Sep. 2, 2020.
Prior Publication US 2022/0067904 A1, Mar. 3, 2022
Int. Cl. G06T 7/00 (2017.01); G01N 25/16 (2006.01); G06F 30/23 (2020.01); G06T 7/593 (2017.01); G06T 7/60 (2017.01); G06V 10/75 (2022.01)
CPC G06T 7/001 (2013.01) [G01N 25/16 (2013.01); G06F 30/23 (2020.01); G06T 7/593 (2017.01); G06T 7/60 (2013.01); G06V 10/751 (2022.01); G06T 2207/10012 (2013.01); G06T 2207/30108 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method for determining an expansion coefficient of a test material, the method comprising:
receiving first image data of a compound material, wherein the compound material comprises a plate and a layer of the test material, which is attached to the plate;
receiving at least one second image data of the compound material, which has been exposed to an environmental condition, before the at least one second image data has been recorded;
determining a measured deformation of the compound material by comparing the first image data and the at least one second image data; and
performing a simulated deformation of a model of the compound material exposed to the environmental condition and determining the expansion coefficient of the test material by varying the expansion coefficient until the simulated deformation conforms to the measured deformation, wherein:
the test material comprises fibers embedded into a resin;
expansion coefficients of the test material with respect to at least two directions are determined; and
the model includes information on warp and weft directions of the fibers.