Safety back-up for metering pump control

Details Safety back-up for metering pump control Safety back-up for metering pump control

1987-03-17

1989-06-13

Shoop, Jr., William M.

Communications: electrical

Condition responsive indicating system

Specific condition

318644, 364510, G05B 500

Patent

active

048395714

ABSTRACT:
A system to detect partial or complete failure of an accurate meter measuring the flow of a liquid by using a sensor to measure the displacement of the pump as a back-up measurement. A computer is used to compare the feedback from the pump sensor with the meter reading, and if the difference between the two flow measurements is greater than a predetermined amount, an alarm will ring, the meter measurement will be ignored, the system shut down, or some other corrective action instituted by the computer. Redundancy is added to the system without the expense of obtaining an additional precision meter.

REFERENCES:
patent: 4089509 (1978-05-01), Morton et al.
patent: 4129034 (1978-12-01), Niles et al.
patent: 4256998 (1981-03-01), Samuels et al.
patent: 4322167 (1982-03-01), Hill
patent: 4330828 (1982-05-01), Smith et al.
patent: 4363742 (1982-12-01), Stone
patent: 4490044 (1984-12-01), Saito et al.
patent: 4585353 (1986-04-01), Schonhausen
patent: 4654802 (1987-03-01), Davis
patent: 4686439 (1987-08-01), Cunningham et al.

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