Title :
Performance evaluation of a fluid temperature-compensated single sensor constant temperature anemometer
Author :
Ferreira, Rômulo Pires Coelho ; Freire, Raimundo Carlos Silvério ; Deep, Gurdip Singh
Author_Institution :
Fed. Center of Technol., Alagoas, Brazil
Abstract :
The performance of a hot-wire anemometer configuration is affected by variation in the fluid temperature. The classical temperature compensation techniques in such anemometers employ two sensors. The performance of a temperature-compensated hot-wire anemometer configuration, using a single sensor alternating between two operating temperatures, and proposed for constant fluid velocity, is investigated under conditions of time-varying fluid velocity. The measurement error introduced is quantified and can be practically eliminated using a low-pass digital filter.
Keywords :
anemometers; circuit simulation; digital filters; error compensation; low-pass filters; measurement errors; temperature sensors; anemometer performance evaluation; electrical equivalence; fluid temperature-compensated anemometer; hot-wire anemometer; low-pass digital filter; measurement error; sensor operating temperatures; single sensor constant temperature anemometer; temperature compensation; thermo-resistive sensor; time-varying fluid velocity; Bridge circuits; Digital filters; Feedback circuits; Fluid dynamics; Fluid flow measurement; Measurement errors; Temperature sensors; Thermal sensors; Voltage; Voltage-controlled oscillators;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
DOI :
10.1109/TIM.2003.818554
