On line ultra-sonic velocity gauge

Details On line ultra-sonic velocity gauge On line ultra-sonic velocity gauge

G - Physics

01

N

349/31

G01N 29/00 (2006.01) D21G 9/00 (2006.01) G01H 5/00 (2006.01) G01N 29/07 (2006.01) G01N 33/34 (2006.01)

Patent

CA 1146256

ON LINE ULTRASONIC VELOCITY GAUGE ABSTRACT A device which measures the velocity of ultra- sonic waves in a moving web is provided. A pair of wheels is mounted for continuous surface contact with the paper and a transducer, which contacts the web on each revolution, is located in each wheel for relating electrical and mechanical signals. Timing means measures the time it takes a mechanical signal generated at the first wheel to reach the second wheel. Noise reducing and amplifying means are provided for effective operation.

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