Title :
Hot-wire anemometer with temperature compensation using only one sensor
Author :
Ferreira, Rômulo Pires Coelho ; Freire, Raimundo Carlos Silvéiro ; Deep, Gurdip Singh ; de Rocha Neto, J.S. ; Oliveira, Amauri
Author_Institution :
UFPB, Brazil
fDate :
8/1/2001 12:00:00 AM
Abstract :
In conventional constant temperature hot-wire anemometers, the compensation for the fluid temperature is done by using two sensors. In this paper, the analysis of an anemometer circuit using only one sensor, operating alternately at two different temperatures is presented. The effect of the amplifier input offset voltage is taken into account, and its influence on the measurement of fluid velocity is quantified. Preliminary experimental results are also presented
Keywords :
anemometers; compensation; electric sensing devices; equivalent circuits; flow measurement; thermoelectric devices; amplifier input offset voltage; electrical equivalence; fluid temperature; hot-wire anemometer; measurement of fluid velocity; operational amplifier; temperature compensation; thermoresistive sensor; Circuits; Fluid flow measurement; Resistance heating; Temperature dependence; Temperature sensors; Thermal sensors; Thermoresistivity; Velocity measurement; Voltage; Wire;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
