Ultrasonic density measurement

Details Ultrasonic density measurement Ultrasonic density measurement

G - Physics

01

N

349/35

G01N 9/00 (2006.01)

Patent

CA 1264195

TITLE Ultrasonic Density Measurement INVENTOR Luc Piché ABSTRACT OF THE DISCLOSURE The density of polyethylene is determined by measuring the velocity of ultrasound through the material. The determination of density is based on the correlation between the velocity of ultrasound in semi-crystalline materials and their density, and involves the measurement of time delays of a transmitted ultrasonic pulse from each of the front surface of the material the rear surface of the material and a reflector which are immersed in a liquid. Operating within a selected frequency range provides measurements of density while eliminating viscoelastic effects.

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