Pulsating liquid flow transmitter

Details Pulsating liquid flow transmitter Pulsating liquid flow transmitter

1974-07-12

1976-01-13

Queisser, Richard C.

Measuring and testing

Volume or rate of flow

Thermal type

340199, G01F 124

Patent

active

039317374

ABSTRACT:
A flow transmitter for monitoring pulsating liquid flow rates, such as intermittent or cyclic impulsion produced by reciprocating pumps, employs a short stroke, variable area flowmeter having an armature core mounted in the flowmeter stem. As the stem rises and falls with flow, the armature moves within a linear variable differential transformer coil to produce an A. C. voltage following core deflection. This A. C. deflection signal is converted to a milliampere D. C. signal by means of a demodulator which through a long-time constant RC filter network averages the pulsed flow variations to provide a continuous non-inferential measurement proportional to flow.

REFERENCES:
patent: 3284786 (1966-11-01), Harris
patent: 3455161 (1969-07-01), Randall
patent: 3522731 (1970-08-01), Wilson
patent: 3701136 (1972-10-01), Stevens et al.
Boylestad, R. and L. Nashelsky, Electronic Devices and Circuit Theory, Prentice Hall, Inc., N.J., 1972, p. 696.

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