| 摘要 |
PROBLEM TO BE SOLVED: To perform accurate measurement when pressure changes or even when the pressure is constant. SOLUTION: This flow rate measuring device has a flow rate detecting means 6 for detecting a flow rate of a fluid passage 5, and a pressure fluctuation control valve 6 for restraining an inverse directional flow, and constituting a flow flowing in from the center and diffusing to the periphery in the forward direction on the upstream side of the fluid passage 5. Thus, a pressure fluctuation is restrained by preventing the inverse directional flow, and an accurate flow rate can be determined without causing turbulence of the flow even in a non-pulsating state. COPYRIGHT: (C)2004,JPO
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