Laser induced acoustic generation for sonic modulus

Details Laser induced acoustic generation for sonic modulus Laser induced acoustic generation for sonic modulus

G - Physics

01

N

349/35

G01N 29/04 (2006.01) G01N 21/86 (2006.01) G01N 29/07 (2006.01) G01N 29/24 (2006.01)

Patent

CA 1273099

ABSTRACT OF THE DISCLOSURE A method and device which measures the velocity of ultra- sonic waves in a moving web is disclosed. The excitation source is a laser or other device which produces short intense light pulses and the detection system is either a piezoelectric transducer or a microphone. The latter obviates any need for physical contact with the web in order to carry out tests for strength parameters as the web is manufactured.

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