Irrigation controller using regression model

  • US 6,892,113 B1
  • Filed: 07/07/2000
  • Issued: 05/10/2005
  • Est. Priority Date: 07/07/2000
  • Status: Expired due to Fees
First Claim
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1. An irrigation controller comprising:

  • a memory that stores a regression model, wherein the regression model is based upon a set of historical ETo values and a set of corresponding historical values for an environmental factor, the regression model running with optional input from a local sensor;

    a microprocessor that applies a current value for the environmental factor to the regression model to calculate a current evapotranspiration rate (estimated ETo), wherein the irrigation controller uses the estimated ETo to determine an irrigation schedule executed by the irrigation controller.

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