Non-full state detecting apparatus and method
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United States of America Patent
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-
Dec 6, 1994
Grant Date -
N/A
app pub date -
Mar 3, 1993
filing date -
Mar 4, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A non-full state detecting apparatus comprises an upper excitation coil disposed above the conduit, a lower excitation coil disposed below the conduit, a sensor provided on the side of the conduit for producing an output corresponding to the fluid when each of the coils is excited, a device for exciting both the upper and lower coils, a device for exciting any one of the upper and lower coils, a comparator for comparing a first output from the sensor produced when both the coils are excited and a second output from the sensor produced when any one of the coils is excited, and a device for determining from the result of the comparison by the comparator whether the conduit is full of the flow flowing therethrough. The excitation of both the upper and lower coils renders uniform a magnetic flux distribution in the conduit to thereby achieve detection without an error.
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