Compensating method and device for instrumental error in rotary displacement flowmeter
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United States of America Patent
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Sep 17, 1991
Grant Date -
N/A
app pub date -
Jan 3, 1989
filing date -
Jan 26, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An instrumental error compensating device has super precision measurement functions, even in a condition having only microtemperature changes, by utilizing a computer which compensates for flowrate errors instantaneously and sends signals for indicating corrected values. Flowmeter (1) of the type having elliptical gears (4,4') has temperature sensor (5) mounted thereon and a rotation sensor (6, 71) for indicating temperature and rotational speed. The signals from the sensors are fed to a micro computer (100). The errors can be caused by wear temperature changes, and viscosity changer, for example, and are compensated for by the computer based on flow rate and temperature of the fluid detected by the sensors.
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