Flow rate measurement device

摘要

A problem of the present invention is to provide a flow rate measurement device which is capable of simplifying calculation, reducing the amount of memory necessary for calculation, absorbing variations resulting from manual operation or ignition state when appliances are used alone or in combination, and improving appliance identification precision with a configuration which extracts characteristics of appliances. The flow rate measurement device monitors and determines the change in a flow rate measured by a flow rate measurement unit, monitors and determines the code obtained by differential conversion unit, extracts appliance characteristic flow rates representing the characteristics of the gas appliances, and compares them with the appliance-specific characteristics, thereby identifying the gas appliances.

主权项

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 calculation unit that is configured to calculate differentials at regular time intervals in the flow rate measured by the flow rate measurement unit; a flow rate classification table in which a plurality of differential classifications classified according to a magnitude of differentials are associated with codes representing the respective differential classifications; a differential conversion unit that is configured to convert the differentials calculated by the calculation unit to the codes based on the flow rate classification table; an appliance characteristic extraction unit that is configured to generate an appliance characteristic code sequence representing a characteristic of an appliance from the codes obtained at regular time intervals by the differential conversion unit or extract a plurality of appliance characteristic flow rates representing characteristics of appliances from the flow rate measured by the flow rate measurement unit; and an appliance identification unit that is configured to compare at least either the appliance characteristic code sequence extracted by the appliance characteristic extraction unit with appliance-specific characteristic code sequences representing characteristic code sequences specific to appliances held in an appliance-specific characteristic information holding unit, or the plurality of appliance characteristic flow rates extracted by the appliance characteristic extraction unit with a plurality of appliance-specific characteristic flow rates representing characteristic flow rates specific to appliances held in the appliance-specific characteristic information holding unit so as to identity the appliance, wherein when codes within a predetermined range from among the codes obtained by the differential conversion unit appear continuously a first predetermined number of times, the appliance characteristic extraction unit stores an average value of flow rates until appeared continuously the first predetermined number of times as an intermediate stable flow rate of the appliance characteristic flow rates, and when codes within the predetermined range from among the codes obtained by the differential conversion unit appear continuously a second predetermined number of times, the appliance characteristic extraction unit stores an average value of flow rates until appeared continuously the second predetermined number of times as a stable flow rate of the appliance characteristic flow rates.