FLOW RATE MEASURING DEVICE AND PROGRAM FOR THE DEVICE, METHOD OF MEASURING FLOW RATE, AND FLUID FEED SYSTEM

摘要

There is provided a technique for accurately identifying an appliance which uses the fluid from a viewpoint of the range of a change in flow rate value.
An ultrasonic flow rate measuring device 7 measures a flow rate value of gas flowing in a flow passage 6 of a gas meter 16, and a measured flow rate information storage section 8 stores a measured flow rate value. A measured flow rate value difference calculation section 9 calculates a measured flow rate value difference within a predetermined period corresponding to an amount of change occurred in a measured flow rate value. An appliance identifying section 11 identifies an appliance which uses the fluid or leakage by determining whether or not the measured flow rate value difference is a predetermined threshold or less.