Area-programmable sprinkler

摘要

A sprinkler system which is controllable to provide water to an area to be sprinkled includes a sprinkler head (108) to move between a first position and a second position. The sprinkler system further includes a sprinkler head positioner (121) to move the sprinkler head between the first and second positions, a sprinkler head position determiner (130) to determine a current sprinkler head position between the first and second positions, a flow control valve (172) to control flow of water from a water supply to the sprinkler head, a flow control valve positioner (174) to establish a current control valve position for the flow control valve between an essentially fully closed control valve position and an essentially fully open control valve position, and a controller (182) to receive a sprinkler head position signal from the sprinkler head position determiner and send a control valve control signal to the flow control valve positioner in response thereto.