Flow responsive transmitter and indicator

Details Flow responsive transmitter and indicator Flow responsive transmitter and indicator

1987-01-21

1990-02-06

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

By measuring thrust or drag forces

364510, G01F 128

Patent

active

048980366

ABSTRACT:
In the measurement of fluid flow, the generation of a linearly varying signal and a pulsation free display are provided by a flow responsive indicator having digit displays for numerically indicating the rate of measured flow. The digit displays are driven in accordance with a measured flow signal applied to circuitrry for generating an updated display signal from a previous display signal and the current value of the measured flow signal. This analog updated display signal is converted into a digital signal for driving circuitry connected to each of the digit displays. The measured flow signal applied to the indicator is generated at a flow transmitter including a transducer, such as a Hall effect element. This transducer generates a signal varying with flow in response to movement of a vane mounted in proximity thereto. To provide a signal varying linearly with flow rate, a flexible element extends into the fluid stream and by action thereof displaces the vane with reference to the transducer to generate the desired linearly varying signal.

REFERENCES:
patent: 3380299 (1968-04-01), Seymour
patent: 3681983 (1972-08-01), Alexander
patent: 3855458 (1974-12-01), Motter et al.
patent: 4353118 (1982-10-01), Heimgartner et al.
patent: 4625565 (1986-12-01), Wada et al.

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