Patent ID: 6652188
Filing Date: 2003-11-25
Classification: A01G,Y02A,Y10T

Abstract:
A control system for irrigation, comprising: a conduit having an inlet fluidly connected with a first valve connected to a water supply and an outlet disposed at a remote location for carrying water therewithin and applying said water to an irrigation zone; a remote power supply; moisture detection means connected to said remote power supply and located in said irrigation zone, said moisture detection means providing a moisture signal in accordance with moisture condition thereat; first control means connected to said remote power supply for receiving said moisture signal and outputting a first encoded signal based on said moisture condition; first acoustic coupling means including outlet transmitter means acoustically coupled with said conduit proximate said outlet for receiving said first encoded signal and generating an acoustic pressure wave to said water based on said first encoded signal; second acoustical coupling means including inlet receiver means acoustically coupled with said conduit proximate said inlet for receiving said pressure wave and generating a control signal based thereon; and second control means connected to a local power supply for receiving and decoding said control signal and conditioning said valve for opening if prescribing a need for water in said irrigation zone.