Title :
Temperature compensation for hot-film crosswind sensors
Author :
Anshi, Chen ; Jing, Zu ; Bin, Li
Author_Institution :
North China Inst. of Technol., Shanxi, China
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;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 1997. IMTC/97. Proceedings. Sensing, Processing, Networking., IEEE
Conference_Location :
Ottawa, Ont.
Print_ISBN :
0-7803-3747-6
DOI :
10.1109/IMTC.1997.612368
