Kelvin sensed hot-wire anemometer

Details Kelvin sensed hot-wire anemometer Kelvin sensed hot-wire anemometer

2005-01-11

2005-01-11

Patel, Harshad (Department: 2855)

Measuring and testing

Volume or rate of flow

Using turbine

C073S204270, C128S200240

Reexamination Certificate

active

06840116

ABSTRACT:
A Kelvin sensed hot-wire anemometer includes four electrically conductive pins and a filament welded to all four pins, preferably using a single filament. A current source is coupled to the two innermost pins so as to provide current flow in the segment of filament between the two innermost pins. The two outermost pins are coupled to a high impedance voltage sense amplifier that senses the voltage drop across the energized segment of filament between the two innermost pins. The resistance of the filament is determined based on the current provided to the filament and the measured voltage. The Kelvin sensed hot-wire anemometer can be used in a number of applications, including, but not limited to medical devices that measure gas flow rates during inhalation and exhalation.

REFERENCES:
patent: 5282385 (1994-02-01), Kayano et al.
patent: 20020100474 (2002-08-01), Kellner et al.
Beta Evaluation of the Enhanced Mass Flow Sensor (emfs) and Vmax Spectra Software, by SensorMedics Corp. Jun. 14, 2001.*
Updat: Beta Evaluation of the Enhanced Mass Flow Sensor (emfs) and Vmax Spectra Software, by SensorMedics Corp. Oct. 1, 2001.*
“Tech Support: Applications Note 20: Quad Tracking Power Supply Manager,” Summit Microelectronics, Inc.; printed from <http://www.summitmicor.com/tech-support
otes
ote20.htm> on Mar. 30, 2002.
“Hot-Wire Anemometers: Introduction”, efunda engineering fundamentals, printed from <http://www.efunda.com/designstandards/sensors/hot-wires/hot-wires-theory.cfm> on Mar. 31, 2002.
Hot-Wire Anemometers: Introduction, Overview, efunda engineering fundamentals, printed from http://www.efunda.com/designstandards/sensors/hot-wires/hot-wires-intro.cfm> on Mar. 21, 2002.

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