Flow measuring device and flow measuring method

Details Flow measuring device and flow measuring method Flow measuring device and flow measuring method

1997-05-23

2000-08-01

Oen, William

Measuring and testing

Volume or rate of flow

Thermal type

G01F 168

Patent

active

060949821

ABSTRACT:
A first heating resistor is placed in a fluid flow path. A second heating resistor is placed downstream of the first heating resistor. A power supply unit supplies power to each of the first and second heating resistors. A measuring unit measures directly or indirectly a heating factor value of each of the first and second heating resistors. A subtracting unit subtracts the heating factor value of the first heating resistor from the heating factor value of the second heating resistor. A calculating unit performs one of multiplication and division on the subtracting result and the heating factor value of one of the first and second heating resistors.

REFERENCES:
patent: 4627279 (1986-12-01), Ohta et al.
patent: 4793176 (1988-12-01), Sato et al.
patent: 4829818 (1989-05-01), Bohrer
patent: 4936144 (1990-06-01), Djorup
patent: 5094105 (1992-03-01), Emmert, Jr. et al.
patent: 5410912 (1995-05-01), Suzuki
Hideyuki Shibuya, Patent Abstracts of Japan Document No: 7-117436 Date: May 9, 1995, Title: Suspension Control Device.

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