Fluid flow speed measuring apparatus

Details Fluid flow speed measuring apparatus Fluid flow speed measuring apparatus

1987-08-24

1989-05-02

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

Using differential pressure

73202, G01F 134

Patent

active

048257044

ABSTRACT:
A fluid flow speed measuring apparatus comprising a first pipe having an opening exposed into a fluid to be measured, a direction of the opening having an angle larger than a critical negative pressure angle, a second pipe having an opening exposed into the fluid to be measured, a direction of the opening of the second pipe having an angle larger than the critical negative pressure angle and at least one of conditions such as a diameter, a direction, and the number of the openings for determining a magnitude of the negative pressure being different from that of the opening of the first pipe, negative pressure difference detector for detecting a difference between negative pressures acting on the openings of the first and second pipes, and device for calculating a flow speed of the fluid to be measured on the basis of an output from the negative pressure difference detector.

REFERENCES:
patent: 3803921 (1974-04-01), Dieterich
patent: 4215565 (1980-08-01), Zanker
patent: 4546655 (1985-10-01), Victor
patent: 4730500 (1988-03-01), Hughes

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