Agricultural harvester with closed loop ground tracking control

Details Agricultural harvester with closed loop ground tracking control Agricultural harvester with closed loop ground tracking control

1995-06-05

1996-07-16

Melius, Terry Lee

Harvesters

Motorized harvester

With condition-responsive operation

56208, A01D 7528

Patent

active

055355773

ABSTRACT:
A method and apparatus for controlling an agricultural harvester having a cut crop receiving header coupled to a hydraulic cylinder. The header applies a force against the ground that is adjusted by applying pressure to the cylinder. Proportional raise and lower valves control the pressure in the cylinder. A pressure signal representing cylinder pressure is received. The difference between the measured pressure and the setpoint is used to compute input signals, which are transmitted to the valves. Cylinder pressure is maintained substantially at a setpoint, the setpoint being adjustable in response to varying terrain. The setpoint is set to a first value in falling terrain and a second value in rising terrain. At the top of a hill, the setpoint is reduced below the first value until ground contact is regained, and the pressure is recharged above the second value. Alternatively, header height may be measured and the valves controlled to maintain header position substantially constant relative to the ground or the harvester frame. Header lateral tilt is controlled while controlling either cylinder pressure or header height. A resume function returns the header from a raised position to a cutting position at the beginning of a new row.

REFERENCES:
patent: 3908345 (1975-09-01), Oni et al.
patent: 3980002 (1976-09-01), Jarman et al.
patent: 4126293 (1978-11-01), Zeuner et al.
patent: 4136508 (1979-01-01), Coleman et al.
patent: 4204383 (1980-05-01), Milliken, Jr.
patent: 4211057 (1980-07-01), Dougherty et al.
patent: 4227363 (1980-10-01), Kerber et al.
patent: 4332126 (1982-06-01), Van Auwelaer et al.
patent: 4401009 (1983-08-01), Zeuner et al.
patent: 4541229 (1985-09-01), Elijah
patent: 4573308 (1986-03-01), Ehrecke et al.
patent: 4594840 (1986-06-01), Glaubitz et al.
patent: 4598718 (1986-09-01), Halls et al.
patent: 4612757 (1986-09-01), Halls et al.
patent: 4622803 (1986-11-01), Lech
patent: 4641490 (1987-02-01), Wynn et al.
patent: 4651118 (1987-03-01), Zeuner et al.
patent: 4663921 (1987-05-01), Hagstrom et al.
patent: 4736753 (1988-04-01), Glaubitz et al.
patent: 4776153 (1988-10-01), DePauw et al.
patent: 4942724 (1990-07-01), Diekhans et al.
"Robotic engineering": an integrated approach/Richard Klafter, Thomas Chmielewski, Michael Negin, Library of Congress Cataloging-in-Publication Data; 1989; pp. 730-734.

Affiliated with

Also associated with

Rating

Agricultural harvester with closed loop ground tracking control does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Agricultural harvester with closed loop ground tracking control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Agricultural harvester with closed loop ground tracking control will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1776597