G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 29/00 (2006.01) G01N 29/07 (2006.01) G01N 29/28 (2006.01) G01N 29/32 (2006.01) G01N 29/38 (2006.01) G01N 29/40 (2006.01)
Patent
CA 2372261
A method and system for measuring the shrinkage behavior and modulus change during the solidification of a polymeric resin is provided, which uses ultrasonic waves propagating through a sample and a medium that acts as a coupling medium. In particular, ultrasonic signals are sent to a surface of a sample. The time of travel of the part of the signal that is reflected at the interface between the sample and the coupling medium back to a sensor, gives the position of the interface between a sample and the coupling medium. This information is used to determine the shrinkage of a sample. The time of travel of the part of the signal that propagates through the thickness of the sample and then reflects from the bottom of the sample at the interface between the sample and the container in which it is contained is used to determine the degree of stiffness of the sample. The time of travel is of the order of one microsecond and the change of thickness of the sample is of tree order of a few hundred micrometers.
Hoa Suong Van
Ouellette Paul
Concordia University
Goudreau Gage Dubuc
LandOfFree
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