Method of varying the speed of a center pivot irrigation system
US6036121A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 14, 1998 |
| Grant date | Mar 14, 2000 |
| Priority date | — |
| Expiry date | Sep 14, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01G25/162
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The method of controlling the speed of the last regular drive unit of a center pivot irrigation system having a corner irrigation system pivotally connected thereto is disclosed comprising the steps of: placing a pressure transducer at the downstream side of the main water line for monitoring the changes in main water line pressure as the sprinklers on the extension water line are sequenced; driving the last regular drive unit at a predetermined speed; recording the output of the pressure transducer at predetermined intervals; comparing the recorded output at the predetermined intervals to the pressure recorded when all the sprinklers on the extension line are turned off; and varying the speed of the last regular drive unit according to the formula NEW SPEED=(END PRESSURE/RETRACTED END PRESSURE).sup.1/2 .times.L.R.D.U. SPEED SETTING.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.