MEASURING DEVICE OF FLOW SENSOR AND MEASURING TECHNIQUE OF AIR FLOWRATE

摘要

PPROBLEM TO BE SOLVED: To provide a measuring device of flow sensor with small drift, and to provide a measurement technique of air flowrate. PSOLUTION: In the measuring device of flow sensor, having a reference temperature sensor (RHF) measuring ambient temperature, a first temperature sensor (RHF1), a first heating resistance (RH1) for controlling the temperature to the first constant value, a second temperature sensor (RHF2), and a second heating resistance (RH2) for controlling the temperature to the second constant value, an impressed voltage (UH2) to a second heating resistance (RH2) is assumed to be an output voltage (UA) of the flow sensor. PCOPYRIGHT: (C)2006,JPO&NCIPI