Coriolis mass flow meter
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United States of America Patent
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Aug 13, 1991
Grant Date -
N/A
app pub date -
Jul 31, 1990
filing date -
Jul 31, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A Coriolis mass flow meter for measuring the volume of mass flowing through a conduit. The flow meter includes at least one flow tube through which the mass to be measured passes. The flow tube is vibrated at a selected frequency that produces a resultant oscillation which is dependent upon Coriolis forces generated by the flowing mass. The oscillations of the flow tube are measured optically utilizing an optical fiber measurement system comprising a loop of optical fiber capable of producing microbend-induced optical attenuation, which is coupled to the flow tube, an optical signal source, an optical detector means, and means for determining the modulation of the optical signal between the input end and the output end of the optical fiber. Preferably, the optical fiber is metal-coated.
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