Systems and methods for improving haul road conditions

• US 8,014,924 B2
• Filed: 10/12/2007
• Issued: 09/06/2011
• Est. Priority Date: 10/12/2007
• Status: Active Grant

• Current Assignee: Caterpillar Incorporated
• Original Assignee: Caterpillar Incorporated
• Inventors: Liu, Yang, Vyas, Bhavin Jagdishbhal, Greiner, Jonny Ray
• Primary Examiner(s): Hellner; Mark
• Application Number:
  US11/974,240
• Publication Number:
  US 20090099707A1
• Time in Patent Office: 1,425 Days
• Field of Search: 731/05, 701/80, 701/50, 701/1
• US Class Current: 701/50
• CPC Class Codes: E02F 9/2045 Guiding machines along a predetermined path for graders E02F3/841; machines for construction of roads E01C19/004
• CPC Class Codes: E02F 9/265 with follow-up actions (e.g. control signals sent to actuate the work tool)
• CPC Class Codes: G01S 19/42 Determining position
• CPC Class Codes: G05D 1/0278 using satellite positioning signals, e.g. GPS
• CPC Class Codes: G05D 1/0297 by controlling means in a control room
• CPC Class Codes: G06Q 10/0637 Strategic management or analysis, e.g. setting a goal or target of an organisation; Planning actions based on goals; Analysis or evaluation of effectiveness of goals
• CPC Class Codes: G06Q 10/0639 Performance analysis of employees; Performance analysis of enterprise or organisation operations
• CPC Class Codes: G06Q 10/083 Shipping
• CPC Class Codes: Y02P 90/845 Inventory and reporting systems for greenhouse gases [GHG]

Abstract

A method for improving haul road surface conditions comprises collecting performance data associated with at least one machine operating on a haul route and determining a rolling resistance of each of the at least one machine based on the performance data. An average rolling resistance associated with one or more portions of the haul route is determined based on the rolling resistance of each of the at least one machine. The one or more portions of the haul route are identified as irregular if the average rolling resistance of the one or more portions exceeds a threshold resistance value. A proposed modification to the irregular portion of the haul route is generated, and performance of the at least one machine is simulated based on the proposed modification. The method also includes outputting results of the simulated performance.

Claims

1. A haul route management system, comprising:

a condition monitoring system in data communication with a machine operating in a work environment and configured to collect performance data associated with at least one machine;

a torque estimator communicatively coupled to the condition monitoring system and configured to determine a rolling resistance of each of the at least one machine based on the performance data;

a performance simulator communicatively coupled to the torque estimator and the condition monitoring system, wherein the performance simulator is configured to;

determine an average rolling resistance based on the rolling resistance of each of the at least one machine;

identify a portion of the haul route as irregular if the average rolling resistance of the at least one machine exceeds a threshold resistance value;

receive a proposed modification to the irregular portion of the haul route;

simulate a performance of the at least one machine based on the proposed modification; and

output results of the simulated performance.

2. The system of claim 1, wherein the condition monitoring system is wirelessly coupled to an on-board data collector of the machine and configured to receive performance data from the on-board data collector during operations of the machine.

3. The system of claim 1, wherein the performance simulator includes the torque estimator.

4. The system of claim 1, wherein performance data includes drive axle torque and GPS data associated with the at least one machine.

5. The system of claim 4, wherein determining the rolling resistance of each of the at least one machines includes:

calculating a total effective grade associated with the machine based on the drive axle torque;

estimating an actual grade associated with the at least one machine based on the GPS data; and

calculating the rolling resistance of each of the at least one machine based on the total effective grade and actual grade associated with the at least one machine.

6. The system of claim 1, where the performance simulator is further configured to estimate a cost associated with implementing the proposed modification based on historical haul route data.

7. The system of claim 6, wherein outputting results of the simulated performance includes generating a haul route modification report that summarizes one or more of the proposed modification, results of the simulated performance, and the estimated costs associated with implementing the proposed modifications.

8. The system of claim 1, wherein the proposed modification includes adjusting an actual grade associated with the irregular portion of the haul route.

9. The system of claim 1, wherein the proposed modification includes modifying a surface composition associated with the irregular portion of the haul route.

10. The system of claim 1, wherein the proposed modification includes modifying a surface density associated with the irregular portion of the haul route.

11. The system of claim 1, wherein the torque estimator is further configured to estimate an efficiency loss of the machine.

12. The system of claim 11, wherein the efficiency loss is estimated as the difference between input power and output power efficiency ratings of the machine.