Temperature compensation for hot-film crosswind sensors

Author

Anshi, Chen ; Jing, Zu ; Bin, Li

Author_Institution

North China Inst. of Technol., Shanxi, China

Volume

2

fYear

1997

fDate

19-21 May 1997

Firstpage

1086

Abstract

An approach to calibrate temperature compensation for hot-film crosswind sensors is proposed. The crosswind sensor consists of a pair of platinum films which are closely spaced by the bridging material. A resistive thermal detector (RTD) with positive temperature coefficient is employed to compensate for variations in ambient temperature. Given the temperature coefficients of platinum films and the RTD, temperature compensation can be easily made outside wind tunnels by setting a variable resistor to a calculated value. Theoretical analysis and tests in the wind tunnel show that the approach is simple and accurate

Keywords

anemometers; bridge instruments; calibration; compensation; electric sensing devices; feedback amplifiers; resistance thermometers; wind; Pt; Wheatstone bridge; ambient temperature variations; calibration; hot-film crosswind sensors; negative feedback amplifier; positive temperature coefficient; resistive thermal detector; temperature compensation; variable resistor; wind tunnels; Bridge circuits; Fluid flow measurement; Platinum; Resistors; Sensor systems; Signal processing; Temperature sensors; Testing; Velocity measurement; Wind speed;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference, 1997. IMTC/97. Proceedings. Sensing, Processing, Networking., IEEE

Conference_Location

Ottawa, Ont.

ISSN

1091-5281

Print_ISBN

0-7803-3747-6

Type

conf

DOI

10.1109/IMTC.1997.612368

Filename

612368