Hydraulic and earth engineering – Drainage or irrigation – Control means responsive to sensed condition
Patent
1995-06-19
1997-09-16
Graysay, Tamara L.
Hydraulic and earth engineering
Drainage or irrigation
Control means responsive to sensed condition
405 36, 405 39, 137 783, 239 63, F02B 1300
Patent
active
056673361
ABSTRACT:
An automated furrow irrigation control method and system involves the initiation of an irrigation flow into an upstream end of a furrow at an initial water discharge rate; continuously or periodically sensing the progress of water flow along the furrow; continuously or periodically increasing the water discharge rate in response to the sensed progress of the water flow so as to ensure a substantially continuous flow in the furrow at a flow rate which lies substantially between .+-.30% of a constant value; sensing the arrival of the water flow at a downstream end of the furrow; reducing the water discharge rate in response to the sensed arrival of the water flow at the downstream end of the furrow; sensing the percolation of the water flow at the downstream end down to a predetermined depth; and terminating the irrigation flow in response to the sensed percolation.
REFERENCES:
patent: 2785006 (1957-03-01), Young et al.
patent: 3114243 (1963-12-01), Winters
patent: 3628563 (1971-12-01), Takehiko
patent: 3952522 (1976-04-01), Shettel
patent: 4431338 (1984-02-01), Hornobrook
patent: 4464079 (1984-08-01), Chance
patent: 5341831 (1994-08-01), Zur
Graysay Tamara L.
Laeman Frederick L.
Technion Research and Development Foundation
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