Microprocessor-based control and diagnostic system for motor ope

Details Microprocessor-based control and diagnostic system for motor ope Microprocessor-based control and diagnostic system for motor ope

1985-06-28

1987-09-15

Ruggiero, Joseph

Boots, shoes, and leggings

1374875, 137554, 25112901, 364167, 364510, G05B 1302, F16K 3102

Patent

active

046943900

ABSTRACT:
There is described a microprocessor-based valve motor control system which provides control, predictive control and diagnostic functions for a motor operated valve. A valve stem position sensor measures the stem position and a load sensor measures the load on the valve stem.
When the valve is being opened, the system predicts the position of the valve stem at a predefined time in the future and turns off the motor if the predicted valve stem position is beyond a preselected open valve position. When said valve is being closed, the system predicts the load on the valve stem at a predefined time in the future and turns off the motor if the predicted load value exceeds a preselected maximum desirable stem closing load.

REFERENCES:
patent: 3343409 (1967-09-01), Gibbs
patent: 4345612 (1982-08-01), Koni et al.
patent: 4364111 (1982-12-01), Jocz
patent: 4406122 (1983-09-01), McDuffie
patent: 4455012 (1984-06-01), Gupta
patent: 4523286 (1985-06-01), Koga et al.
patent: 4562531 (1985-12-01), Enterline et al.

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