Header height control for a harvesting head

Patent metadata

Field	Value
Publication number	US-12396394-B2
Application number	US-202017438310-A
Country	US
Kind code	B2
Filing date	Mar 11, 2020
Priority date	Mar 11, 2019
Publication date	Aug 26, 2025
Grant date	Aug 26, 2025

Abstract

An agricultural vehicle header having a center section and a wing section movably attached to the center section. A displacement sensor indicates a position of the wing section within its range of movement. A signal conditioning unit receives input from a displacement sensor that indicates the wing section position, an inboard height sensor, and an outboard height sensor, and applies correction factors to generate inboard and outboard control signals. When the wing section is in a median operating range the inboard correction factor is larger than the outboard correction factor. When the wing section is in a higher operating range, the outboard correction factor is larger than the inboard correction factor. An agricultural combine having the header and a method for operating a header are also provided.

First claim

The invention claimed is:

1. A header for an agricultural vehicle, the header comprising:
a center section extending from a first end to a second end;
a wing section movably attached to the first end of the center section, the wing section being movable relative to the center section through a range of motion comprising a lower operating range including a lowest operating position, a higher operating range including a highest operating position, and a median operating range between the lower operating range and the higher operating range;
a displacement sensor configured to indicate a position of the wing section within the range of movement;
an inboard height sensor located between a centerline of the center section and a distal end of the wing section;
an outboard height sensor located between the inboard height sensor and the distal end of the wing section; and
a signal conditioning unit operatively connected to the displacement sensor, the inboard height sensor and the outboard height sensor, and configured to:
receive a displacement sensor signal from the displacement sensor;
receive an inboard height sensor signal from the inboard height sensor;
receive an outboard height sensor signal from the outboard height sensor;
determine from the displacement sensor signal whether the wing section is in the median operating range and, upon determining that the wing section is in the median operating range: apply an inboard correction factor to the inboard height sensor signal to generate an inboard control signal, and apply an outboard correction factor to the outboard height sensor signal to generate an outboard control signal, with the inboard correction factor being greater in magnitude than the outboard correction factor; and
determine from the displacement sensor signal whether the wing section is in the higher operating range and, upon determining that the wing section is in the higher operating range: apply an inboard correction factor to the inboard height sensor signal to generate an inboard control signal, and apply an outboard correction factor to the outboard height sensor signal to generate an outboard control signal, with the outboard correction factor being greater in magnitude than the inboard correction factor.

2. The header of claim 1 , wherein the inboard height sensor is located on the center section, and the outboard height sensor is located on the wing section proximal to the distal end of the wing section.

3. The header of claim 1 , wherein the wing section is movably attached to the center section by one or more pivots.

4. The header of claim 1 , wherein the displacement sensor comprises one or more potentiometers, gyroscopes or optical sensors, and the inboard height sensor and the outboard height sensor each comprise one or more radar rangefinders, optical rangefinders, ultrasonic rangefinders, drag wheels or drag arms.

5. The header of claim 1 , wherein, upon determining that the wing section is in the higher operating range, the outboard correction factor increases as a function of proximity to the highest operating position.

6. The header of claim 5 , wherein, upon determining that the wing section is in the higher operating range, the outboard correction factor increases exponentially as a function of proximity to the highest operating position.

7. The header of claim 5 , wherein the outboard correction factor has a maximum magnitude when the wing section is in the highest operating position.

8. The header of claim 1 , wherein the signal conditioning unit is further configured to determine from the displacement sensor signal whether the wing section is in the lower operating range and, upon determining that the wing section is in the lower operating range: apply an inboard correction factor to the inboard height sensor signal to generate an inboard control signal, and apply an outboard correction factor to the outboard height sensor signal to generate an outboard control signal, with the outboard correction factor being greater in magnitude than the inboard correction factor.

9. The header of claim 8 , wherein, upon determining that the wing section is in the lower operating range, the outboard correction factor increases as a function of proximity to the lowest operating position.

10. The header of claim 9 , wherein, upon determining that the wing section is in the lower operating range, the outboard correction factor increases exponentially as a function of proximity to the lowest operating position.

11. The header of claim 9 , wherein the outboard correction factor has a maximum magnitude when the wing section is in the lowest operating position.

12. An agricultural combine comprising:
a chassis;
a header movably connected to the chassis by a movable mount;
a combine control system configured to operate the movable mount to change an orientation of the header relative to the chassis;
wherein the header comprises:
a center section extending from a first end to a second end;
a first wing section movably attached to the first end of the center section, the first wing section being movable relative to the center section through a respective range of motion comprising a lower operating range including a lowest operating position, a higher operating range including a highest operating position, and a median operating range between the lower operating range and the higher operating range;
a first displacement sensor configured to indicate a position of the first wing section within the respective range of movement;
a first inboard height sensor located between a centerline of the center section and a distal end of the first wing section;
a first outboard height sensor located between the first inboard height sensor and the distal end of the first wing section; and
a signal conditioning unit operatively connected to the combine control system, the first displacement sensor, the first inboard height sensor and the first outboard height sensor, and configured to:
receive a first displacement sensor signal from the first displacement sensor;
receive a first inboard height sensor signal from the first inboard height sensor;
receive a first outboard height sensor signal from the first outboard height sensor;
determine from the first displacement sensor signal whether the first wing section is in its respective median operating range and, upon determining that the first wing section is in its respective median operating range: apply a first inboard correction factor to the first inboard height sensor signal to generate a first inboard control signal, apply a first outboard correction factor to the first outboard height sensor signal to generate a first outboard control signal, with the first inboard correction factor being greater in magnitude than the first outboard correction factor, and send the first inboard control signal and the first outboard control signal to the combine control system; and
determine from the first displacement sensor signal whether the first wing section is in its respective higher operating range and, upon determining that the first wing section is in its respective higher operating range: apply a first inboard correction factor to the first inboard height sensor signal to generate a first inboard control signal, apply a first outboard correction factor to the first outboard height sensor signal to generate a first outboard control signal, with the first outboard correction factor being greater in magnitude than the first inboard correction factor, and send the first inboard control signal and the first outboard control signal to the combine control system.

13. The agricultural combine of cl

Assignees

• Cnh Ind America Llc

Inventors

• Hunt Cory

Classifications

• A01D41/141 Primary

  Automatic header control · CPC title

• A01B63/111 Primary

  regulating working depth of implements · CPC title