Low cost anemometers for wind tunnel and ventilation applications

Gilder Nader, Gabriel Borelli Martins, Paulo José Saiz Jabardo

Resumo

Low-cost and simple-constant-current and pulsed-constant-temperature anemometers are described. The proposed anemometers use a self-heated thermistor as a flow sensor as well as very simple electronics. Data acquisition and control use commonly available micro-controllers. A simple heat transfer model is used to simulate the main characteristics of the sensor and laboratory tests show that the calibration curves of the sensors are repeatable and, even though the sensor has a spherical shape, a directional sensitivity is noticeable.

Texto completo:

PDF

Número de visualizações: 37

Referências

INCROPERA, F. P.; DE WITT, D. P. Introduction to heat transfer. 3rd ed. John New York: Wiley and Sons, 1996.

IRWIN, H. P. A. H. A simple omnidirectional sensor for wind-tunnel studies of pedestrian-level winds. Journal of Wind Engineering and Industrial Aerodynamics, v. 7, p. 219–239, 1981.

JORGENSEN, F. E. How to measure turbulence with hot-wire anemometers - a practical guide. Skovlunde: Dantec Dynamics, 2002. 73 p.

LOMAS, C. G. Fundamentals of hot wire anemometry. Cambridge: Cambridge University Press, 1986.

PALMA, J.; LABBÉ, R. Rugged constant-temperature thermal anemometer. Review of Scientific Instruments, v. 87, n. 12, p. 125112, 2016.

SANDBORN, V. A. Resistance temperature transducers. Fort Collins, Colorado: Metrology Press, 1972.

Apontamentos

  • Não há apontamentos.