Intelligent digital thermal flow sensor

Author

Yiu, F. ; Liu, G.

Author_Institution

Dept. of Aerosp. Eng., Ryerson Univ., Toronto, Ont., Canada

Volume

2

fYear

2003

fDate

22-24 Oct. 2003

Firstpage

1225

Abstract

In the present work, most of the original analog circuit of a conventional hot-wire anemometer is replaced with digital electronics, and a signal prediction algorithm is implemented to speed up the sensor measurement. This digital sensor also includes the following upgraded features: (1) temperature compensation over the nonlinearity characteristics of thermistors to achieve more accurate measurement, (2) direct interface to computer, (3) easy change of operational parameters and sensor configurations, and (4) energy conservation with the use of a Pulse Width Modulation (PWM) heater.

Keywords

anemometers; flow measurement; heat transfer; Pulse Width Modulation heater; analog circuit; conventional hot-wire anemometer; digital electronics; direct interface; energy conservation; intelligent digital thermal flow sensor; operational parameters; sensor configurations; sensor measurement; signal prediction algorithm; temperature compensation; thermistors; Analog circuits; Fluid flow measurement; Intelligent sensors; Prediction algorithms; Pulse measurements; Pulse width modulation; Sensor phenomena and characterization; Temperature sensors; Thermal sensors; Velocity measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Sensors, 2003. Proceedings of IEEE

Print_ISBN

0-7803-8133-5

Type

conf

DOI

10.1109/ICSENS.2003.1279140

Filename

1279140