Method for monitoring the work cycle of mobile machinery during material removal

• US 5,864,060 A
• Filed: 03/27/1997
• Issued: 01/26/1999
• Est. Priority Date: 03/27/1997
• Status: Expired due to Term

• Current Assignee: Caterpillar Incorporated
• Original Assignee: Caterpillar Incorporated
• Inventors: Harrod, Gregory R., Henderson, Daniel E.
• Primary Examiner(s): Brock, Michael
• Assistant Examiner(s): Politzer, Jay L.
• Application Number:
  US08/827,429
• Time in Patent Office: 670 Days
• Field of Search: 364/424.07, 342/357, 37/348, 73/432.1
• US Class Current: 73/432.1
• CPC Class Codes: E02F 3/435 for dipper-arms, backhoes or the like
• CPC Class Codes: E02F 9/2045 Guiding machines along a predetermined path for graders E02F3/841; machines for construction of roads E01C19/004

Abstract

The invention is a method for monitoring a work cycle of a mobile machine on a land site. The mobile machine has a bucket and a body that is adapted to rotate about a fixed point of reference. The method includes the steps of determining an angular velocity of the body, determining the body is stopped based on the angular velocity, determining a duration of time the body is stopped, and determining the work cycle in response to the duration of time the body is stopped.

Claims

1. A method for monitoring a work cycle of a mobile machine for moving material on a land site, said mobile machine having a body and a bucket, said body being adapted to rotate about a fixed point of reference, including the steps of:

determining an angular velocity of said body;

determining that said body is stopped in response to said angular velocity being less than a specified amount;

determining a duration of time said body is stopped; and

determining said work cycle in response to said duration of time.

2. A method as set forth in claim 1 wherein the step of determining said work cycle includes the step of determining that said bucket performed a dumping operation in response to said duration of time being less than a specified amount.

3. A method as set forth in claim 2 wherein the step of determining said work cycle includes the step of determining that said bucket performed a loading operation in response to said duration of time being larger than a specified amount.

4. A method as set forth in claim 3, including the steps of:

determining a resource map for said land site; and

defining a potential load region as a portion of said land site located between said body and a maximum extension of said bucket, said potential load region being determined in response to said body being stopped, said potential load region including a primary load region and a secondary load region, said secondary load region being adjacent to said mobile machine, and said primary load region being adjacent to, and overlapping said secondary load region opposite of said mobile machine.

5. A method as set forth in claim 4, wherein the step of determining said work cycle includes the step of determining that said bucket performed a dumping operation in response to said duration of time being less than a specified amount and said material type in said secondary load region being mined out.

6. A method as set forth in claim 5, including the step of identifying a type of said material that is loaded in said bucket.

7. A method as set forth in claim 5, including the steps of:

determining that a dumping operation occurred in response to determining said duration of time being greater than a specified amount and said material in said secondary load region being mined out; and

determining that a loading operation occurred in response to determining said duration of time being greater than a specified amount and said material in said secondary load region not being mined out.

8. A method as set forth in claim 4, including the steps of:

determining a location of said primary load region on said resource map in response to determining that said secondary load region has not been mined out;

determining that said material loaded in said bucket consists of material from said secondary load region in response to said location of said primary load region being off of said resource map; and

determining that said material loaded in said bucket consist of material from said primary load region in response to said location of said primary load region being within said resource map.

9. A method as set forth in claim 1, wherein the step of determining an angular velocity includes the step of determining a position of said body in response to receiving a GPS signal.

10. A method for monitoring a work cycle of a mobile machine for moving material on a land site, said mobile machine having a body and a bucket, said body being adapted to rotate about a fixed point of reference, including the steps of:

determining an angular velocity of said body;

determining said body is stopped in response to said angular velocity being less than a specified amount;

determining a duration of time said body is stopped;

determining a resource map for said land site;

defining a potential load region as a portion of said land site located between said body and a maximum extension of said bucket, said potential load region being determined in response to said body being stopped, said potential load region including a primary load region and a secondary load region, said secondary load region being adjacent to said mobile machine, and said primary load region being adjacent to, and overlapping said secondary load region opposite of said mobile machine;

determining said bucket performed a dumping operation in response to said duration of time being less than a specified amount and said material type in said secondary load region being mined out;

determining said bucket performed a loading operation in response to said duration of time of being one of greater than and equal to said specified amount and said secondary load region not being mined out; and

determining the work cycle in response to said duration of time, said dumping operation and said loading operation.

11. A method for monitoring a work cycle of a mobile machine for moving material on a land site, said mobile machine having a body and a bucket, said body being adapted to rotate about a fixed point of reference, including the steps of:

determining an angular velocity of said body;

determining that said body is stopped in response to said angular velocity being less than a specified amount;

determining a duration of time said body is stopped; and

,

identifying one of a loading and a dumping portion of a work cycle in response to said duration of time.

12. A method as set forth in claim 11, further including the steps of determining a potential load region in response to said body being stopped, wherein the step of identifying said one of a loading and dumping portion further includes the step of identifying said one of a loading and dumping portion in response to said duration of time and said potential load region.

13. A method as set forth in claim 12, further including the steps of determining said potential load region is one of mined out and not mined out.

14. A method as set forth in claim 13, further including the step of:

identifying a loading portion of said work cycle in response to said potential load region being not mined out, and said duration of time being greater than a specified amount.

15. A method as set forth in claim 11, wherein the step of determining said angular velocity further includes the step of determining said angular velocity utilizing a positioning system.

16. A method as set forth in claim 15, wherein the step of determining said angular velocity utilizing a positioning system further includes the step of determining said angular velocity utilizing a plurality of position signals received from a remote source, said position signals being used to determine a plurality of positions of said body.

17. A method, as set forth in claim 11, further comprising the step of determining a dumping portion of a work cycle in response to said duration of time being less than a specified amount.