Mass flowmeter

Details Mass flowmeter Mass flowmeter

1978-11-13

1980-03-11

Woodiel, Donald O.

Measuring and testing

Volume or rate of flow

System

73 32A, 73194M, G01F 184

Patent

active

041921844

ABSTRACT:
Disclosed is a mass flow rate meter having two U-shaped flow loops, means for vibrating the flow loops like the tines of a tuning fork, timing means on the loops for sensing the difference in times between the passing of the sides of the loop through the static plane of the loops, and sensing means for determining which side of the U-shaped tubes went through the static plane first. The time between the passing of the sides of the loops during one half cycle of the vibrations of the loops is combined with the time of another half cycle of the vibrations dependent upon which side of the loops pass through the static plane first. An embodiment is further disclosed having a microprocessor for combining the times, and for comparing these times with a selectable variance from the time of a predetermined set of vibrations before the present time measurement is accepted. Electronic circuitry is also disclosed which improves the time measurement of the timing means.

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"Effect of a Coriolis Force on the Stability Plane Poiseuille Flow", Flaherty et al., American Institute of Physics, pp. 718-726, May, 1978.

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