Pop-up sprinkler comprising a sensor to detect the position or rotation

摘要

The present invention relates to an irrigation sprinkler (10) of the type including a nozzle (16, 26) assembly adapted to move vertically from a lower inoperative position to an upper operative position in response to water pressure, and being adapted to rotate in response to the water pressure. The improvement comprises a generally ring-shaped member (20, 22, 24) coupled to the nozzle assembly when the nozzle assembly is rotating. A magnet (50) attached to the generally ring-shaped member and adapted to produce a first magnetic field. A sensor unit (30) disposed adjacent to the nozzle assembly for detecting the first magnetic field when the nozzle assembly is rotating.