Universal upstream-downstream flowmeter tester

Details Universal upstream-downstream flowmeter tester Universal upstream-downstream flowmeter tester

1987-01-29

1988-08-09

Noland, Tom

Measuring and testing

Specimen model or analog

73 3, G01F 2500

Patent

active

047620129

ABSTRACT:
A circuit simulating the electrical signal response of a flowing liquid whose velocity is to be measured by an upstream-downstream flowmeter. The circuit takes the electrical flowmeter transmit signal from an upstream-downstream flowmeter and actuates a gated oscillator which feeds pulses to a counter, establishing an electrical signal which has a duration of almost the mean transit time of an acoustic signal traveling between transducers and the flowmeter. This signal is incremented by further pulse counts and these further pulses are indicative of the exact mean transit time, plus pulses arriving on either side of the exact mean transit time, indicative of the upstream and downstream transit times. The upstream and downstream pulses are fed to a second oscillator for wave shaping. The second oscillator and associated circuitry simulates electrical signals produced by a transducer receiver in the flowmeter.

REFERENCES:
patent: 3981191 (1976-09-01), Brown
patent: 4509373 (1985-04-01), Brown
patent: 4520650 (1985-06-01), Palmer et al.

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