Laser induced acoustic generation for sonic modulus

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

1986-02-20

1987-06-23

Ciarlante, Anthony V.

Measuring and testing

Vibration

By mechanical waves

73643, G01N 2904

Patent

active

046743324

ABSTRACT:
A method and device which measures the velocity of ultrasonic 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 peizoelectric 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.

REFERENCES:
patent: 4137991 (1979-02-01), Melcher et al.
patent: 4291577 (1981-09-01), Baum et al.
patent: 4338822 (1982-07-01), Yamaguchi et al.
patent: 4353256 (1982-10-01), Moorey
patent: 4446735 (1984-05-01), Weilacher
patent: 4567769 (1986-02-01), Barkhouparian

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