WO2002041092A3 - Irrigation controller using modified regression model - Google Patents

Irrigation controller using modified regression model Download PDF

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Publication number
WO2002041092A3
WO2002041092A3 PCT/US2000/042175 US0042175W WO0241092A3 WO 2002041092 A3 WO2002041092 A3 WO 2002041092A3 US 0042175 W US0042175 W US 0042175W WO 0241092 A3 WO0241092 A3 WO 0241092A3
Authority
WO
WIPO (PCT)
Prior art keywords
estimated
eto
controller
temperature
regression model
Prior art date
Application number
PCT/US2000/042175
Other languages
French (fr)
Other versions
WO2002041092A2 (en
Inventor
Kirk Buhler
Sylvan Addink
Original Assignee
Aqua Conservation Systems Inc
Kirk Buhler
Sylvan Addink
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Aqua Conservation Systems Inc, Kirk Buhler, Sylvan Addink filed Critical Aqua Conservation Systems Inc
Priority to PCT/US2000/042175 priority Critical patent/WO2002041092A2/en
Publication of WO2002041092A2 publication Critical patent/WO2002041092A2/en
Publication of WO2002041092A3 publication Critical patent/WO2002041092A3/en

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Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G25/00—Watering gardens, fields, sports grounds or the like
    • A01G25/16—Control of watering
    • A01G25/167—Control by humidity of the soil itself or of devices simulating soil or of the atmosphere; Soil humidity sensors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture

Abstract

The present invention provides systems and methods in which an irrigation controller (200) uses a regression model (140) that has applied to it a current temperature value to arrive at a first estimated evapotranspiration rate (estimated ETo 1)(320), uses a current cloud cover value to modify the estimated ETo 1 to arrive at a second estimated evapotranspiration rate (estimated ETo 2)(340), and uses the estimated ETo 1 or estimated ETo 2 along with other factors, such as crop coefficient and irrigation efficiency to affect an irrigation schedule executed by the controller (200). The temperature can represent air temperature or soil temperature. The current temperature values and cloud cover values may enter the controller (200) from a local sensor (294, 295), a distal signal source, or both.
PCT/US2000/042175 2000-11-14 2000-11-14 Irrigation controller using modified regression model WO2002041092A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US2000/042175 WO2002041092A2 (en) 2000-11-14 2000-11-14 Irrigation controller using modified regression model

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2000/042175 WO2002041092A2 (en) 2000-11-14 2000-11-14 Irrigation controller using modified regression model

Publications (2)

Publication Number Publication Date
WO2002041092A2 WO2002041092A2 (en) 2002-05-23
WO2002041092A3 true WO2002041092A3 (en) 2008-03-27

Family

ID=21742205

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/042175 WO2002041092A2 (en) 2000-11-14 2000-11-14 Irrigation controller using modified regression model

Country Status (1)

Country Link
WO (1) WO2002041092A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101419219B (en) * 2008-12-09 2013-09-11 中国农业科学院农业资源与农业区划研究所 Method for determining evapotranspiration rate of referential crops

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5208855A (en) * 1991-09-20 1993-05-04 Marian Michael B Method and apparatus for irrigation control using evapotranspiration
US5696671A (en) * 1994-02-17 1997-12-09 Waterlink Systems, Inc. Evapotranspiration forecasting irrigation control system
US5839660A (en) * 1997-06-11 1998-11-24 Morgenstern; Paul Auxiliary sprinkler system controller to maintain healthy turf with minimum water usage
US5884225A (en) * 1997-02-06 1999-03-16 Cargill Incorporated Predicting optimum harvest times of standing crops
US6145755A (en) * 1999-07-23 2000-11-14 Feltz; Louis V. Supplemental irrigation programmer

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5208855A (en) * 1991-09-20 1993-05-04 Marian Michael B Method and apparatus for irrigation control using evapotranspiration
US5696671A (en) * 1994-02-17 1997-12-09 Waterlink Systems, Inc. Evapotranspiration forecasting irrigation control system
US5884225A (en) * 1997-02-06 1999-03-16 Cargill Incorporated Predicting optimum harvest times of standing crops
US5839660A (en) * 1997-06-11 1998-11-24 Morgenstern; Paul Auxiliary sprinkler system controller to maintain healthy turf with minimum water usage
US6145755A (en) * 1999-07-23 2000-11-14 Feltz; Louis V. Supplemental irrigation programmer

Also Published As

Publication number Publication date
WO2002041092A2 (en) 2002-05-23

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