| 摘要 |
The invention bypasses a need for human participation in the process of remotely controlling irrigation sprinklers using Evapotranspiration (ET) values. In one embodiment, a transmitter broadcasts updated Evapotranspiration (ET) data directly to a collection of receiver/controller units using an FM subcarrier. These receiver/controller units are microprocessor-based and coupled to a set of irrigation sprinklers. The method provides for broadcasting an encoded ET data signal to a collection of receiving and irrigation-controlling units. The receiving and irrigation-controlling units include microprocessor means and storage means for storing a preset ET zone reference and crop adjustment values. The method also includes receiving and decrypting an encrypted ET data signal into a broadcast ET zone identifier and a broadcast corresponding ET value. The method further compares the broadcast ET zone identifier with the preset ET zone reference. The method adjusts an irrigation flow quantity responsive to the broadcast ET value, scaled by the crop adjustment value, when the broadcast ET zone identifier matches the preset ET zone reference.
|
