Flow sensor for measuring high fluid flow rates

Details Flow sensor for measuring high fluid flow rates Flow sensor for measuring high fluid flow rates

1991-05-10

1993-08-24

Razavi, Michael T.

Measuring and testing

Volume or rate of flow

Thermal type

G01F 168

Patent

active

052378667

ABSTRACT:
An apparatus for measuring the flow of fluid comprising a tube through which the fluid to be measured may flow, including means for varying the temperature at a selected location on the tube. A plurality of temperature sensors are used to measure the temperature at locations on the in flow end, that is upstream of the means for varying the temperature, and at least one sensor is used for measuring the temperature downstream of the selected location. A plurality of separate sensors are used on the input end to provide information to determine the temperature gradient along the tube. When the gradient is used in connection with the temperature sensed at known locations at the upstream and downstream section of the tube relative to the selected location that temperature differential is used to determine the flow of fluid. The tube preferably is secured to, or embedded in, a layer of material adapted to transfer heat between sections of the tube.

REFERENCES:
patent: 3326040 (1967-06-01), Walsh
patent: 3827299 (1974-08-01), Welland
patent: 4519246 (1985-05-01), Hartemink
patent: 4548075 (1985-10-01), Mariano
patent: 4972707 (1990-11-01), Nijdam

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