Ultrasonic flowmeter including stable flow rate calculation means based on instantaneous flow rate
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United States of America Patent
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Jul 12, 2005
Grant Date -
Jan 6, 2005
app pub date -
Aug 19, 2004
filing date -
Jun 24, 1999
priority date (Note) -
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Abstract
In accordance with one embodiment, a flow meter of the present invention includes: transmission/reception means provided in a flow path for performing transmission/reception using a state change of fluid; repetition means for repeating the transmission/reception; time measurement means for measuring a time of propagation repeated by the repetition means; flow rate detection means for detecting a flow rate based on a value of the time measurement means; and number-of-times change means for changing to a predetermined number of repetition times. With such a structure, an influence caused by a variation of a flow can be suppressed by changing the number of repetition times so as to be suitable for a variation. As a result, reliable flow rate measurement with a high accuracy can be achieved.
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