Hydraulic and earth engineering – Fluid control – treatment – or containment – Flow control
Patent
1983-06-20
1985-02-12
Taylor, Dennis L.
Hydraulic and earth engineering
Fluid control, treatment, or containment
Flow control
137386, 405 37, E02B 720, E02B 740
Patent
active
044988095
ABSTRACT:
A flow compensated controller for use in automatically controlling the water level in an open channel is disclosed. An electrical signal received from a transducer at a measuring location and corresponding to the actual water level in the channel at that location is amplified and compared with an amplified signal corresponding to the desired water level. An error signal corresponding to the difference between the two signals is fed into a proportional amplifier and also into an automatic reset unit. The outputs of the proportional amplifier and the automatic reset unit are fed into a summing amplifier. The output of the summing amplifier is fed into a motor modulation driver whose output is connected to a pair of gate operator relays, one relay connected for sending a control signal to the gate operator to move the gate in one direction and the other relay connected for sending a control signal to the gate operator to move the gate in the other direction. The two relays are connected to the gate operator through a third relay which is controlled by an oscillator driven time proportioning comparator which enables the control power to the gate operator at one portion of the time and disables the control power to the gate operator during the other portion of the time in order to allow the water level to stabilize after the gate position has been changed. During the disable period the time proportioning comparator also disables the automatic reset unit so that it is not integrating.
REFERENCES:
patent: 2667748 (1954-02-01), Heath
patent: 2746480 (1956-05-01), Hildyard
patent: 3338261 (1967-08-01), Bergeson et al.
patent: 3922564 (1975-11-01), Kachuk et al.
patent: 4036023 (1977-07-01), Matsumoto et al.
patent: 4332507 (1982-06-01), Wakamori et al.
Jacobs Mark C.
Taylor Dennis L.
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