2006•Journal of Shandong University of TechnologyRequires access
Measuring technology of hot-wire air flow sensor
Zhao Wei
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Abstract
The hot-wire air flow sensor is a kind of sensor that can measure the mass flow of air directly.The principle of the hot-wire air flow sensor is introduced here,the design for measurement circuit at constant current and constant temperature are expounded,the flow equations have been derived out.Temperature compensation and processing method for outputs are discussed,a fitting formula for the designed sensor is provided,the result show that the hot-wire air flow sensor can accurately measure the mass flow of air.