Abstract: A controllable sprinkler includes a sprinkler head having a water discharge nozzle adapted to move between first and second sprinkler head positions via a sprinkler head positioner (such as a water motor), and a sprinkler head position determiner to determine a current sprinkler head position between the first and second positions. A flow control valve controls flow of water from a water supply to the discharge nozzle. A flow control valve positioner establishes a current control valve position of the flow control valve between essentially fully closed and essentially fully open positions. A water flow detector determines an approximation of water emanating from the control valve, and generates a water flow signal. A controller receives a sprinkler head position from the sprinkler head position determiner, and the water flow signal from the water flow detector, and in response sends a control valve control signal to the flow control valve positioner.

Abstract: A center pivot sprinkler system includes a sprinkler arm to be mounted at a pivot point at a first end of the sprinkler arm, the sprinkler arm defining a water conduit. A motive source can move the sprinkler arm in a circular motion about the pivot point. An end nozzle is supported at a second end of the sprinkler arm, and in fluid communication with the water conduit. A control valve is positioned between the water conduit and the end nozzle, and a control valve positioner can position the control valve. A position determining device determines the position of the end nozzle in a circular arc about the pivot point. A processor polls the position determining device to determine a then-current position of the end nozzle and determines a flow of water to be issued from the end nozzle as a function of the then-current position of the end nozzle.

Abstract: A center pivot sprinkler system includes a sprinkler arm to be mounted at a pivot point at a first end of the sprinkler arm, the sprinkler arm defining a water conduit. A motive source can move the sprinkler arm in a circular motion about the pivot point. An end nozzle is supported at a second end of the sprinkler arm, and in fluid communication with the water conduit. A control valve is positioned between the water conduit and the end nozzle, and a control valve positioner can position the control valve. A position determining device determines the position of the end nozzle in a circular arc about the pivot point. A processor polls the position determining device to determine a then-current position of the end nozzle and determines a flow of water to be issued from the end nozzle as a function of the then-current position of the end nozzle.