Constant temperature anemometer having an enhanced frequency res

Details Constant temperature anemometer having an enhanced frequency res Constant temperature anemometer having an enhanced frequency res

1983-05-16

1985-06-18

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

Thermal type

G01F 168

Patent

active

045234620

ABSTRACT:
A constant temperature anemometer having an enhanced frequency response. A sensor element is included within one leg of a bridge circuit with a feedback circuit being operatively connected to the bridge circuit. The bridge circuit frequency response is shaped by impedance elements connected in parallel with another leg of the bridge circuit. In a preferred embodiment, the impedance elements include serially connected resistance and capacitance elements.

REFERENCES:
patent: 3645133 (1972-02-01), Simeth et al.
patent: 3765244 (1983-10-01), Brzezinski
patent: 4311042 (1982-01-01), Hosoya et al.
Disa Information dated May 1971, p. 38, entitled "New Improvements in Anemometry Instruments".
Disa Information dated May 1971, p. 39, entitled "Description of the Individual Units".
Disa Information dated May 1971, p. 42, entitled "Improvements in Frequency Response".
Journal of Fluids Engineering, Dec. 1976, entitled "A Simple Linearized Hot-Wire Anemometer", pp. 749-752.
Department of Civil Engineering, Colorado State University, entitled "A Dual-Amplifier Hot-Wire Anemometer".
von Karman Institute for Fluid Dynamics, entitled "Theory and Design of a Constant Temperature Linearized Hot Wire Anemometer", dated Oct., 1974.
Department of Aerospace Engineering Sciences, University of Colorado, paper entitled "Analysis of a New Hot-Wire Anemometer with Shaped Bridge Impedance", 1982.
Department of Aerospace Engineering Sciences, University of Colorado, entitled "Off-Optimum Operation of Constant Temperature Hot-Wire Anemometers", dated 1982.

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