Laminar flow meter characteristic information acquisition system and laminar flow meter characteristic information acquisition method

摘要

PROBLEM TO BE SOLVED: To provide a characteristic information acquisition system of a laminar flow type flow meter for accurately measuring an intake flow rate to an engine or an exhaust flow rate from an engine. SOLUTION: The characteristic information acquisition system of the laminar flow meter LMF is connected to the differential pressure sensor 11 removed from the laminar flow meter LMF and the upstream connection pipe 11b of the differential pressure sensor 11 and air is supplied to the upstream connection pipe 11b. A pressure that is attached at a position near the connection between the inflowing air inflow path 80 and the first connection pipe 11b of the air inflow path 80 and measures the air pressure in the air inflow path 80 near the first connection pipe 11b. It includes a sensor 60 and a measuring device 50 that acquires measured values from each of the differential pressure sensor 11 and the pressure sensor 60. One end of the downstream connection pipe 11c of the differential pressure sensor 11 is open to the atmosphere, and the measuring device 50 uses the pressure measured by the pressure sensor 60 and the differential pressure measured by the differential pressure sensor 11. Generate differential pressure sensor characteristic information. [Selection diagram] Fig. 2