Method And System For Calculating And Displaying Work Tool Orientation And Machine Using Same

• US 20130004282A1
• Filed: 06/28/2011
• Published: 01/03/2013
• Est. Priority Date: 06/28/2011
• Status: Active Grant

• Current Assignee: Caterpillar Incorporated
• Original Assignee: Caterpillar Incorporated
• Inventors: Grimes, Joel R., Budde, Steven Conrad, Forcash, Joseph Edward, Mays, Christopher Lee
• Granted Patent: US 8,977,441 B2
• Time in Patent Office: Days
• US Class Current: 414/698
• CPC Class Codes: B66F 9/065 non-masted mobile jacks of the garage type mounted on wheels or rollers B66F5/00
• CPC Class Codes: B66F 9/0755 Position control; Position detectors
• CPC Class Codes: E02F 3/96 with arrangements for alternate or simultaneous use of different digging elements E02F3/7604, E02F3/769, E02F3/78 take precedence; quick-acting devices to connect tools to arms or booms E02F3/3609, for arms to tractors or the like E02F3/627
• CPC Class Codes: E02F 9/264 Sensors and their calibration for indicating the position of the work tool

Abstract

A machine includes a plurality of ground engaging elements and an operator control station supported on a frame. A work tool is pivotably attached to the frame using a lift arm assembly and a tilt linkage. At least one device measures a quantity associated with at least one of the lift arm assembly, the tilt linkage, and the work tool. An electronic controller, in communication with an operator display and the at least one device. The electronic controller is configured to store an operator selected orientation of the work tool, calculate a current orientation of the work tool based on the quantity, and calculate a deviation of the current orientation from the operator selected orientation. A visual representation of the deviation is displayed on the operator display.

Claims

1. A machine, comprising:

a frame;

a plurality of ground engaging elements supported on the frame;

a work tool pivotably attached to the frame using a lift arm assembly and a tilt linkage;

at least one device for measuring a quantity associated with at least one of the lift arm assembly, the tilt linkage, and the work tool; and

an electronic controller in communication with an operator display and the at least one device, wherein the electronic controller is configured to store an operator selected orientation of the work tool, calculate a current orientation of the work tool based at least in part on the quantity, calculate a deviation of the current orientation from the operator selected orientation, and display a visual representation of the deviation on the operator display.

2. The machine of claim 1, further including a first sensor configured to detect an angular orientation of the lift arm assembly and a second sensor configured to detect an angular orientation of the tilt linkage, wherein the current orientation of the work tool is based on the angular orientation of the lift arm assembly and the angular orientation of the tilt linkage.

3. The machine of claim 2, wherein the current orientation corresponds to a current angular displacement of the work tool relative to a reference plane.

4. The machine of claim 3, wherein the first sensor is configured to detect an angular displacement of a lift arm of the lift arm assembly relative to the reference plane, and the second sensor is configured to detect an angular displacement of a first link member of the tilt linkage relative to the lift arm, wherein the angular displacement of the first link member is correlated to an angular displacement of the work tool relative to the lift arm.

5. The machine of claim 4, wherein the operator selected orientation corresponds to an operator selected angular displacement of the work tool relative to the reference plane.

6. The machine of claim 5, wherein the electronic controller is further configured to store a first operator selected height, calculate a current height of the work tool based on the angular orientation of the lift arm assembly, calculate a height deviation of the current height from the operator selected height, and display a visual representation of the height deviation on the operator display.

7. The machine of claim 5, wherein the electronic controller is further configured to store a first operator selected height and a second operator selected height, calculate a current height of the work tool based on the angular orientation of the lift arm assembly, and display a visual representation of the current height relative to the first operator selected height and the second operator selected height on the operator display.

8. The machine of claim 2, further including a lift adjustment controller and a tilt adjustment controller positioned within the operator control station and in communication with the electronic controller, wherein the operator selected orientation is based on operator selected positions of the lift adjustment controller and the tilt adjustment controller.

9. The machine of claim 8, further including a hydraulic lift cylinder positioned to adjust the angular orientation of the lift arm assembly and a hydraulic tilt cylinder positioned to adjust the angular orientation of the tilt linkage, wherein the electronic controller is further configured to send a lift control signal to the hydraulic lift cylinder based on the operator selected position of the lift adjustment controller and send a tilt control signal to the hydraulic tilt cylinder based on the operator selected position of the tilt adjustment controller.

10. The machine of claim 2, wherein the electronic controller is further configured to store a default orientation of the work tool and calculate the deviation of the current orientation from the default orientation.

11. A method of operating a machine, the machine including a frame, a plurality of ground engaging elements supported on the frame, a work tool pivotably attached to the frame using a lift arm assembly and a tilt linkage, at least one device for measuring a quantity associated with at least one of the lift arm assembly, the tilt linkage, and the work tool, and an electronic controller in communication with an operator display and the at least one device, the method comprising steps of:

storing an operator selected orientation of the work tool on the electronic controller;

calculating a current orientation of the work tool based at least in part on the quantity using the electronic controller;

calculating a deviation of the current orientation from the operator selected orientation using the electronic controller; and

displaying a visual representation of the deviation on the operator display.

12. The method of claim 11, further including actuating a lift adjustment controller and a tilt adjustment controller, and storing the operator selected orientation based on actuated positions of the lift adjustment controller and the tilt adjustment controller.

13. The method of claim 12, further including:

adjusting an angular orientation of the lift arm assembly using a hydraulic lift cylinder based on the actuated position of the lift adjustment controller; and

adjusting an angular orientation of the tilt linkage using a hydraulic tilt cylinder based on the actuated position of the tilt adjustment cylinder.

14. The method of claim 13, further including adjusting the current orientation using at least one of the lift adjustment controller and the tilt adjustment controller based on the visual representation.

15. The method of claim 11, further including storing a first operator selected height on the electronic controller, calculating a current height of the work tool based at least in part on the quantity using the electronic controller, calculating a height deviation of the current height from the operator selected height using the electronic controller, and displaying a visual representation of the height deviation on the operator display.

16. The method of claim 11, further including storing a first operator selected height and a second operator selected height on the electronic controller, calculating a current height of the work tool based at least in part on the quantity using the electronic controller, and displaying a visual representation of the current height relative to the first operator selected height and the second operator selected height on the operator display.

17. A control system for a machine, the machine including a frame, a plurality of ground engaging elements supported on the frame, a work tool pivotably attached to the frame using a lift arm assembly and a tilt linkage, at least one device for measuring a quantity associated with at least one of the lift arm assembly, the tilt linkage, and the work tool, and an electronic controller in communication with an operator display and the at least one device, the control system comprising:

an electronic controller including a memory having a work tool positioning display algorithm and an operator selected orientation stored thereon, wherein the electronic controller includes a processor configured to execute the work tool positioning display algorithm;

wherein the work tool positioning display algorithm is configured to receive a device signal corresponding to the quantity, wherein the work tool positioning display algorithm is further configured to calculate a current orientation of the work tool based at least in part on the quantity, calculate a deviation of the current orientation from the operator selected orientation, and send a first display signal corresponding to the deviation to an operator display.

18. The control system of claim 17, wherein the work tool positioning display algorithm is configured to receive a first angular orientation corresponding to an angular orientation of a lift arm assembly and a second angular orientation signal corresponding to an angular orientation of a tilt linkage, wherein the work tool positioning display algorithm is further configured to calculate a current orientation of the work tool based on the angular orientation of the lift arm assembly and the angular orientation of the tilt linkage.

19. The control system of claim 18, wherein the memory also has a default orientation stored thereon, and the work tool positioning display algorithm is further configured to calculate the deviation of the current orientation from the default orientation.

20. The control system of claim 18, wherein the memory also has a first operator selected height and a second operator selected height stored thereon, and the work tool positioning display algorithm is further configured to calculate a current height of the work tool based on the angular orientation of the lift arm assembly, and send a second display signal corresponding to the current height relative to the first operator selected height and the second operator selected height to the operator display.