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Title: US5361534: Method of controlling irrigation
[ Derwent Title ]

Country: US United States of America

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10 pages

Inventor: Burns, Ivey L.; Orlando, FL
Muller, Eldon R.; Orlando, FL
Bell, Edward; Orlando, FL

Assignee: The Walt Disney Company, Burbank, CA
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Published / Filed: 1994-11-08 / 1994-01-12

Application Number: US1994000180536

IPC Code: Advanced: A01G 27/00;
IPC-7: A01G 25/00;

ECLA Code: A01G27/00D;

U.S. Class: Current: 047/079; 047/048.5;
Original: 047/079; 047/048.5;

Field of Search: 047/079,79 C,48.5

Priority Number:
1994-01-12  US1994000180536
1993-06-10  US1993000074777
1991-03-29  US1991000677487

Abstract:     An irrigation control system is disclosed for controlling the irrigation of horticultural plants or crops grown in containers. The system includes a beam assembly for supporting the plant media system and a load cell for providing an electrical output signal proportional to the load applied to the beam assembly by the plant media system. The load cell is interfaced with a microcomputer which executes a control program of the present invention. The control program reads the signal from the load cell at selected intervals and signals for an irrigation event if the current weight of the plant media system is less than a predetermined base weight. A new predetermined base weight is calculated and reset after each irrigation event. In this way, the system bases the initiation of an irrigation event on real time, short term, differential weight change of the plant media system due to evapotranspiration, while allowing for compensation of weight change effects due to other factors such as fruit set, plant weight, pruning and harvesting.

Attorney, Agent or Firm: Pretty, Schroeder, Brueggemann & Clark ;

Primary / Asst. Examiners: Britts, Ramon S.; Downs, Joanne C.

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Related Applications:
Application Number Filed Patent Pub. Date  Title
US1993000074777 1993-06-10       
US1991000677487 1991-03-29    1993-09-07  Irrigation control system

Parent Case:     This application is a continuation of application Ser. No. 08/074,777, filed Jun. 10, 1993, now abandoned, which is a division of application Ser. No. 677,487, filed Mar. 29, 1991, now U.S. Pat. No. 5,241,78.

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First Claim:
Show all 5 claims
We claim:     1. A method of controlling irrigation, comprising the steps of:
  • placing a plant media system to be irrigated on a movable beam assembly;
  • sensing the weight of the plant media system by a load sensing means placed underneath the beam assembly;
  • reading the sensed weight at selected intervals of time by control means for controlling the irrigation of the plant media system;
  • initiating an irrigating event when the weight of the plant media system sensed by the load sensing means is less than a predetermined base weight as calculated by the control means; and
  • recalculating the predetermined base weight after each irrigation event by subtracting a predetermined weight from the weight of the plant media system sensed following an irrigation event.

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Forward References: Show 6 U.S. patent(s) that reference this one

U.S. References: Go to Result Set: All U.S. references   |  Forward references (6)   |   Backward references (23)   |   Citation Link

Patent  Pub.Date  Inventor Assignee   Title
Get PDF - 104pp USRE31023  1982-09 Hall, III  Advanced Decision Handling, Inc. Highly automated agricultural production system
Get PDF - 3pp US984964  1911-02 Pladeck   GREENHOUSE-BENCH.
Get PDF - 6pp US3293799* 1966-12 Keller et al.    
Get PDF - 3pp US3314192* 1967-04 Park    
Get PDF - 7pp US3860172  1975-01 Platt   AUTOMATIC IRRIGATION APPARATUS
Get PDF - 6pp US4021964  1977-05 Darwin et al.  Darwin; William B. Hydroponic system convertible to an open or closed system
Get PDF - 8pp US4048753  1977-09 Roberts, Jr. et al.   Hydroponic garden structure
Get PDF - 8pp US4059227  1977-11 Hunter  The Toro Company Moisture sensing apparatus and method
Get PDF - 5pp US4060934  1977-12 Skaggs   Water tender
Get PDF - 5pp US4107875  1978-08 Bordine   Greenhouse equipment
Get PDF - 19pp US4209131  1980-06 Barash et al.  Motorola, Inc. Computer-controlled irrigation system
Get PDF - 21pp US4332105  1982-06 Nir  ADI-Aeroponics Growth Ltd. Apparatus and method for plant growth in aeroponic conditions
Get PDF - 15pp US4423484  1983-12 Hamilton   Irrigation control system
Get PDF - 6pp US4630394  1986-12 Sherard   Subirrigation gravel culture growing bed
Get PDF - 5pp US4676023  1987-06 Mori   Cultivation device by use of water-and-air mixture
Get PDF - 12pp US4691290  1987-09 Griffen  Reliance Electric Company Creep-compensated weighing apparatus
Get PDF - 4pp US4760666  1988-08 Han   Watering device for plants
Get PDF - 7pp US4796212  1989-01 Kitagawa  Tokyo Electric Co., Ltd. Load cell type, weight-measuring device
Get PDF - 4pp US4834579  1989-05 Aris et al.  Soletanche, Societe Anonyme Dite Waterproofing dams and the like
Get PDF - 6pp US4849918  1989-07 Feinland  Pitney Bowes Inc. Weighing instrument having adaptive breakpoints
Get PDF - 18pp US5020261  1991-06 Lishman   Moisture sensitive self-watering planter
Get PDF - 5pp US5020275  1991-06 Bednarzik   Watering method and apparatus for plants
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Foreign References:
Publication Date IPC Code Assignee   Title

Other Abstract Info: DERABS G93-294710 DERG94-356776 DERABS G94-356776

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