Temperature compensated flowmeter techniques

Details Temperature compensated flowmeter techniques Temperature compensated flowmeter techniques

G - Physics

01

F

73/72

G01F 1/68 (2006.01) G01F 1/698 (2006.01)

Patent

CA 2018435

A bridge-type "hot wire" flowmeter is temperature compensated by selecting the values of a power resistor, a ballast resistor and a calibration resistor in accordance with an iterative numerical solution of a pair of equations of the form ? = C5*Ti5+C4*Ti4+C3*Ti3+C2*Ti2+C1*Ti+C? ? = K2*Tr2+K1*Tr+K? wherein the ideal temperature Ti to which the self-heated resistor should be heated for ideal temperature compensation and the real temperature Tr to which the self-heated resistor is actually heated are specified to be equal at three predetermined values of ambient temperature within the range over which it is desired to temperature compensate the flowmeter.

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