Patent ID: 9097572
Filing Date: 2015-08-04
Classification: G01F

Abstract:
1. A flow rate measurement device, comprising: a flow rate measurement unit that is configured to measure a flow rate of a fluid flowing in a flow channel at a regular time interval; a first calculation unit that is configured to calculate differentials at regular time intervals in the flow rates measured by the flow rate measurement unit; a second calculation unit that is configured to calculate differentials at time intervals different from those in the first calculation unit; a flow rate classification table in which a plurality of differential classifications classified according to a magnitude of the differentials are associated with codes representing the respective classifications; a differential conversion unit that is configured to convert the differentials calculated by the first calculation unit and the second calculation unit into first code sequences based on the flow rate classification table; an appliance characteristic extraction unit that is configured to generate second code sequences representing characteristics of an appliance from the first code sequences, wherein the second code sequences are compressed information represented by the first code sequences, the appliance characteristic extraction unit further configured to extract a plurality of appliance characteristic flow rates representing characteristics of the appliance from the flow rate measured by the flow rate measurement unit; an appliance-specific characteristic information holding unit that stores appliance-specific characteristic code sequences specific to the appliances and a plurality of appliance-specific characteristic flow rates specific to the appliances; an appliance identification unit that is configured to compare at least either the second code sequences with the appliance-specific characteristic code sequences specific to the appliances and the plurality of appliance characteristic flow rates with the plurality of appliance-specific characteristic flow rates specific to the appliances and identifies an appliance based on a comparison between the second code sequences and the appliance-specific characteristic code sequences, a comparison between the appliance characteristic flow rates and the appliance-specific characteristic flow rates, or both.