Three-Axis’ Heat Loss Anemometer Comprising Thick-Film Segmented Thermistors
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AuthorsAleksić, Stanko O.
Mitrović, Nebojša S.
Luković, Miloljub D.
Luković, Snežana G.
Article (Accepted Version)
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NTC thick-film segmented thermistors were used as anemometer sensing devices. They were screen printed of thick-film thermistor paste based on modified NiMn2O4 fine powder, organic vehicle, and glass frit. Their electrical properties, such as resistance vs. temperature R(T) and thermistor exponential factor B were obtained using measurements in the climatic test chamber. A uniaxial anemometer was formed using a thick-film segmented thermistor, which was placed in the hole drilled in rectangular piece of thermally insulating material. The uniaxial anemometer was used for the optimization of operating point of segmented thermistors as self-heating/wind sensing devices. The dc supply voltage was correlated with the air temperature sub-ranges (RCV). The power save mode such as 30s self-heating/5 min pause was used to measure the thermistor response on stable wind blow. The three-axis' anemometer was formed using five sensor devices placed in five holes drilled in the cubical piece of therm...ally insulating material: three thermistor sensors measure wind speed on the x, y, z - axes, the fourth sensor Pt 1000 measures the air temperature T, while the fifth sensor (capacitive type) measures humidity H. The obtained sensitivity and inaccuracy were compared with respective ones of other anemometers.
Keywords:air temperature sub-ranges / air temperature T / anemometer sensing devices / anemometers / atmospheric temperature / climatic test chamber / dc supply voltage / electrical properties / Electrical resistance measurement / Fluid flow measurement / fourth sensor Pt 1000 measures / glass frit / heath loss anemometer / Heating systems / modified fine powder / nickel compounds / NiMn2O4 / NTC thick-film segmented thermistors / organic vehicle / rectangular piece / self-heating/wind sensing devices / sensor devices / Sensors / stable wind blow / Temperature measurement / thermally insulating material / thermistor exponential factor B / thermistor response / thermistor sensors / thermistors / Thermistors / thick-film thermistor paste / Thick-film thermistors / three-axis heat loss anemometer / time 30.0 s / time 5.0 min / uniaxial anemometer / wind / wind speed
Source:IEEE Sensors Journal, 2019, 19, 22, 10228-10235
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