APPARATUS AND METHOD FOR ESTIMATING FLOW VELOCITY OF FLUID

APPARATUS AND METHOD FOR ESTIMATING FLOW VELOCITY OF FLUID

An apparatus includes a solenoid valve and a pressure sensor disposed in a water pipe in this order from an upstream end, and a control unit controlling open/close of the solenoid valve and receives a sensor signal outputted from the pressure sensor. The controller obtains a difference between a wat...

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1. Verfasser: MURAKAMI, Yotaro
Format: Patent
Sprache:eng
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MEASURING
MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL
METERING BY VOLUME
PHYSICS
TESTING
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description An apparatus includes a solenoid valve and a pressure sensor disposed in a water pipe in this order from an upstream end, and a control unit controlling open/close of the solenoid valve and receives a sensor signal outputted from the pressure sensor. The controller obtains a difference between a water pressure measured by the pressure sensor when it is determined that the decreased degree of opening is increased, and a water pressure measured by the pressure sensor when a flow velocity is zero, and calculates a loss coefficient of an upstream water pipe located upstream from the solenoid valve based on the pressure difference and a flow velocity calculated based on a loss coefficient of the solenoid valve. The controller estimates a flow velocity of the water currently flowing in the water pipe based on the loss coefficient and the difference between water pressures of the last and present measurements.
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subjects MEASURING
MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL
METERING BY VOLUME
PHYSICS
TESTING
title APPARATUS AND METHOD FOR ESTIMATING FLOW VELOCITY OF FLUID
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