GAS FLOW RATE MEASUREMENT DEVICE

• Main Authors: SUZUKI, Kazunori, KOTABE, Akira, HORIE, Junichi, HANZAWA, Keiji
• Format: Patent
• Language: English
• Published: 21.11.2019
• Subjects: MEASURING; MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL; METERING BY VOLUME; PHYSICS; TESTING

The present invention provides a thermal flow rate measurement device that is capable of highly accurate correction of the temperature of an intake gas flow rate using a two-dimensional correction map that stores a correction value in association with temperature and intake gas flow rate. A gas flow rate measurement device that corrects a flow rate detection signal using a correction amount in which the correction amount is a correction amount in which a position displaced from a grid point of an orthogonal grid on a correction map 100A is an acquisition point 102, and stores positional information of the acquisition point 102 on the correction map 100A, and, at a time of flow rate measurement, determines a reference input flow rate that refers to the correction map 100A on the basis of the positional information from a flow rate detection signal, determines a reference input temperature that refers to the correction map 100A on the basis of the positional information from a temperature detection signal, and determines a correction amount corresponding to an input flow rate of an input flow rate Q axis corresponding to the reference input flow rate and an input temperature of an input temperature T axis corresponding to the reference input temperature.