The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 23, 2006
Filed:
Nov. 06, 2000
John W. Addink, Riverside, CA (US);
Sylvan Addink, Riverside, CA (US);
John W. Addink, Riverside, CA (US);
Sylvan Addink, Riverside, CA (US);
Aqua Conserve, Inc., Riverside, CA (US);
Abstract
An irrigation controller () receives temperature data, and at least partly derives an estimated solar radiation value from the temperature data. A regression model stored in a memory () of the irrigation controller () operates upon a data point from the estimated solar radiation to estimate an evapotranspiration rate, which is used to affect an irrigation schedule executed by the controller (). The regression model is preferably based upon a comparison of historical ETo values against corresponding historical environmental values, with the data advantageously spanning a time period of at least two days, and more preferably at least one month. Data from one or more environmental factors may also be used, including especially estimated solar radiation, temperature, wind speed, humidity, and soil moisture, and so forth. Values relating the environmental factor(s) may enter the controller from a local sensor (), a distal signal source, or both.