Method of maintaining a uniform chemical depth under the center pivot portion of a corner irrigation system
US6045065A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 14, 1998 |
| Grant date | Apr 4, 2000 |
| Priority date | — |
| Expiry date | Sep 14, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01G25/092
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The method of controlling the speed of the last regular drive unit (L.R.D.U.) of a center pivot irrigation machine having a corner span pivotally connected thereto comprising: placing an angle sensor at the pivotal connection of the main boom and the extension boom for monitoring the angle therebetween upon predetermined time increments; changing the speed of the L.R.D.U. according to the formula: EQU NEW SPEED=(LS).sup.2 /(LS+PC).sup.2 .times.L.R.D.U. Speed Setting where PC is the projected corner length, LS is the corner length and wherein PC is computed according to: EQU PC=[(LC).sup.2 +(LS).sup.2 -(2.times.LC.times.LS.times.cos AC.degree.)].sup.1/2 -LS where AC is the corner angle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.