THERMAL AIR FLOWMETER

PURPOSE:To unify circuit boards into one kind so as no cure cost and improve the correlation of the title flowmeter by constituting the flowmeter so that its detecting signal can be fetched as two kinds of signals, analog signals and digital signals. CONSTITUTION:The analog signal of an air flow rat...

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Bibliographische Detailangaben
Hauptverfasser:	AKUTSU YASUO, UCHIYAMA KAORU
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING COMBUSTION ENGINES CONTROLLING COMBUSTION ENGINES HEATING HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS LIGHTING MEASURING MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUIDLEVEL MECHANICAL ENGINEERING METERING BY VOLUME PHYSICS TESTING WEAPONS
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Beschreibung
Zusammenfassung:	PURPOSE:To unify circuit boards into one kind so as no cure cost and improve the correlation of the title flowmeter by constituting the flowmeter so that its detecting signal can be fetched as two kinds of signals, analog signals and digital signals. CONSTITUTION:The analog signal of an air flow rate detected by means of a driving section is inputted to a control unit which controls an engine from an analog output terminal 29 after the signal is amplified or selectively inputted to the control unit through a digital output terminal 28 after the signal is converted into a digital signal at a V-F converting section composed of operational amplifiers 7 and 8, resistors 21-23, and capacitors 24 and 25. When the title flowmeter is constituted in such a way, the circuit boards used in the flowmeter can be unified into one kind and can have a correlation with the control unit. In addition, the operating efficiency can be improved and the cost can be reduced, because the hybrid ICs used in the flowmeter can also be unified into one kind.