Measuring and testing – Volume or rate of flow – System
Patent
1974-09-12
1976-01-20
Ruehl, Charles A.
Measuring and testing
Volume or rate of flow
System
23515134, 235181, G01F 100
Patent
active
RE0286869
ABSTRACT:
Apparatus and a method for measuring the flow rate of a fluid in which a beam of ultrasonic .notlessthan., electromagnetic, optical or other radiant] energy is transmitted across the flow at each of two positions spaced apart in the direction of flow, the noise amplitude, frequency or phase modulation on each beam due to disturbances in the flow is detected, and the two resultant signals are cross correlated to determine the time delay therebetween producing maximum correlation, i.e. the mean fluid transport time between the beams, and thus the mean fluid flow rate.
REFERENCES:
patent: 2202885 (1940-06-01), Zuschlag
patent: 3019647 (1962-02-01), Beard et al.
patent: 3158830 (1964-11-01), Clay, Jr.
patent: 3197625 (1965-07-01), Ratz
patent: 3588699 (1971-06-01), Pysnik
patent: 3595078 (1971-07-01), Beck et al.
patent: 3636763 (1972-01-01), Beck
"Correlation in Action", Hewlett-Packard Journal (Nov. 1969), Vol. 21, No. 3, pp. 17-20.
M. J. Fisher et al., "The Crossed-Beam Correlation Technique" J. Fluid Mech., (1967), Vol. 28, part 4, pp. 705-717.
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