Title:
FLOWMETER
Document Type and Number:
Japanese Patent JP3692689
Kind Code:
B
Abstract:
PROBLEM TO BE SOLVED: To accurately measure the flow rate of a fluid by adjusting the zero point of a flow rate detecting means.
SOLUTION: The flowmeter is constituted of first and second vibrators 9 and 10, which transmit and receive acoustic waves, a flow passage timer means 11, which measures the propagating time of the acoustic waves, a flow rate detecting means 12, which detects the flow rate of a fluid to be measured from the propagating time measured by means of the timer means 11, a vibration coupling means 13, which acoustically couples the vibrating means with each other, a vibration timer means 20, which measures the propagating time of vibrations by using signals transmitted through the coupling means 13, and a zero-point adjusting means 14, which adjusts the zero point of the flow rate detecting means 12. Since the same flow rate detecting processing as that performed when the flow rate is zero can be performed by using the vibration signal of a vibration transmitting means, zero adjustment can be performed even when the flow passage is such a passage that instantaneously changes the flow rate.
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Inventors:
Umekage, Yasuhiro
Nawa, Motoyuki
Nagaoka, Yukio
Nawa, Motoyuki
Nagaoka, Yukio
Application Number:
JP1997000041914
Publication Date:
July 01, 2005
Filing Date:
February 26, 1997
Export Citation:
Assignee:
MATSUSHITA ELECTRIC IND CO LTD
International Classes:
G01F1/66; G01F25/00; G01F1/66; G01F25/00; (IPC1-7): G01F1/66
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