Title :
Intelligent digital thermal flow sensor
Author :
Yiu, F. ; Liu, G.
Author_Institution :
Dept. of Aerosp. Eng., Ryerson Univ., Toronto, Ont., Canada
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;
Conference_Titel :
Sensors, 2003. Proceedings of IEEE
Print_ISBN :
0-7803-8133-5
DOI :
10.1109/ICSENS.2003.1279140
