Method for determining the productivity of an earth moving machines

• US 5,815,826 A
• Filed: 03/28/1996
• Issued: 09/29/1998
• Est. Priority Date: 03/28/1996
• Status: Expired due to Term

• Current Assignee: Caterpillar Incorporated
• Original Assignee: Caterpillar Incorporated
• Inventors: Oliver, Charlene L., Henderson, Daniel E., Paul, David A.
• Primary Examiner(s): Zanelli, Michael
• Assistant Examiner(s): PIPALA, EDWARD J
• Application Number:
  US08/623,076
• Time in Patent Office: 915 Days
• Field of Search: 364/424.07, 364/424.04, 364/449.2, 364/449.7, 364/449.1, 364/423.098, 37/348, 37/907, 342/457, 342/357, 701/50, 701/35, 701/208, 701/201, 701/213, 701/207, 701/1
• US Class Current: 701/50
• CPC Class Codes: E02F 3/431 for bucket-arms, front-end loaders, dumpers or the like
• CPC Class Codes: E02F 3/84 Drives or control devices therefor , e.g. hydraulic drive systems
• CPC Class Codes: E02F 9/2025 Particular purposes of control systems not otherwise provided for E02F3/16, E02F3/26, sub-groups of E02F3/43, E02F3/651, sub-groups of E02F3/84, E02F3/907, E02F5/145 take precedence
• CPC Class Codes: Y10S 37/907 Automatic leveling excavators

Abstract

A method for automatically determining the productivity of an earthmoving machine in real time using an onboard computer. The earthmoving machine operates in cycles having a first portion and a second portion. The earthmoving machine moves in a first direction during the first portion and in a second direction during the second portion. The method includes the steps of detecting the starts of each cycle for a series of cycles, determining a machine parameter corresponding to each cycle, calculating a cycle parameter as a function of the machine parameter, and calculating at least one measure of productivity as a function of the cycle parameter.

Claims

1. A method for automatically determining the productivity of an earthmoving machine in real-time using an onboard computer, the earthmoving machine operating in cycles having a first portion and a second portion, the earthmoving machine moving in a first direction during the first portion and in a second direction during the second portion, comprising:

for a series of cycles, detecting the start of each cycle;

determining a start position of the earthmoving machine at the start of the first portion of each said cycle;

determining an end position of the earthmoving machine at the end of the first portion of each said cycle;

calculating a horizontal distance moved as a function of said start and end positions for each said cycle;

calculating a slope as a function of said start and end positions for each said cycle;

calculating a cumulative horizontal distance traversed;

calculating a cumulative slope traversed; and

calculating a measure of productivity as a function of at least one of said cumulative horizontal distance and said cumulative slope traversed.

2. A method, as set forth in claim 1, wherein said step of calculating a measure of productivity includes the steps of:

calculating an average horizontal distance traversed as a function of said cumulative horizontal distance; and

calculating an average slope traversed as a function of said cumulative slope.

3. A method, as set forth in claim 1, including the steps of:

determining the time the earthmoving machine spent in the first direction during said each cycle;

determining the time the earthmoving machine spent in the second direction during said each cycle;

determining the time the earthmoving machine spent in idle during said each cycle;

calculating the cumulative time the earthmoving machine spent in the first direction during said series of cycles;

calculating the cumulative time the earthmoving machine spent in the second direction during said series of cycles;

calculating the cumulative time the earthmoving machine spent in idle during said series of cycles;

calculating a number of cycles in said series of cycles;

calculating an average of the time the earthmoving machine spent moving in the first direction as a function of the cumulative time the earthmoving machine spent in the first direction during said series of cycles and said number of cycles;

calculating an average of the time the earthmoving machine spent in moving in the second direction as a function of the cumulative time the earthmoving machine spent in the second direction during said series of cycles and said number of cycles; and

,

calculating a number of cycles per hour and an average cycle time as a function of the cumulative time the earthmoving machine spent in the first and second directions during said series of cycles, the cumulative time the earthmoving machine spent in idle during said series of cycles and said number of cycles.

4. A method for automatically determining the productivity of an earthmoving machine in real-time using an onboard computer, the earthmoving machine operating in cycles having a first portion and a second portion, the earthmoving machine moving in a first direction during the first portion and in a second direction during the second portion, comprising:

for a series of cycles, detecting the start of each cycle;

determining a start position of the earthmoving machine at the start of the first portion of each said cycle;

determining an end position of the earthmoving machine at the end of the first portion of each said cycle;

calculating a horizontal distance moved as a function of said start and end positions for each said cycle;

calculating a cumulative horizontal distance traversed corresponding to said series of cycles; and

calculating a measure of productivity as a function of said cumulative horizontal distance, said measure of productivity including an average horizontal distance.

5. A method for automatically determining the productivity of an earthmoving machine in real-time using an onboard computer, the earthmoving machine operating in cycles having a first portion and a second portion, the earthmoving machine moving in a first direction during the first portion and in a second direction during the second portion, comprising:

for a series of cycles, detecting the start of each cycle;

determining a start position of the earthmoving machine at the start of the first portion of each said cycle;

determining an end position of the earthmoving machine at the end of the first portion of each said cycle; and

,

calculating a slope as a function of said start and end positions for each said cycle;

calculating a cumulative slope traversed corresponding to said series of cycles; and

calculating a measure of productivity as a function of said cumulative slope traversed, said measure of productivity including an average slope traversed.

6. A method for automatically determining the productivity of an earthmoving machine in real-time using an onboard computer, the earthmoving machine operating in cycles having a first portion and a second portion, the earthmoving machine moving in a first direction during the first portion and in a second direction during the second portion, wherein the earthmoving machine is operating at a site, the site being modelled in a database, the database including an initial site model and a current site model, the initial site model and the current site model including a series of elevations, comprising the steps of:

for a series of cycles, detecting the start of each cycle;

determining the time the earthmoving machine spent in the first direction during said each cycle;

determining the time the earthmoving machine spent in the second direction during said each cycle;

updating the current site model by determining current elevations as the earthmoving machine traverses the site;

calculating a cycle parameter as a function of said time spent in the first direction and second direction and said updated current site model, corresponding to said series of cycles; and

calculating a measure of productivity as a function for said cycle parameter.

7. A method, as set forth in claim 6, wherein said step of calculating a cycle parameter includes the steps of:

calculating a cumulative cut volume as a function of the initial and current site models;

calculating a cumulative fill volume as a function of the initial and current site models; and

,

calculating a cumulative moving time as a function of the time the earthmoving machine spent in the first and second directions during said each cycle.

8. A method, as set forth in claim 7, wherein said step of calculating a measure of productivity includes the step of calculating the volume of material moved per time unit as a function of said cumulative cut volume, said cumulative fill volume, and said cumulative moving time.

9. A method, as set forth in claim 6, including the steps of:

determining the time the earthmoving machine spent in the first direction during said each cycle;

determining the time the earthmoving machine spent in the second direction during said each cycle;

determining the time the earthmoving machine spent in idle during said each cycle;

calculating the cumulative time the earthmoving machine spent in the first direction during said series of cycles;

calculating the cumulative time the earthmoving machine spent in the second direction during said series of cycles;

calculating the cumulative time the earthmoving machine spent in idle during said series of cycles;

calculating a number of cycles in said series of cycles;

calculating an average of the time the earthmoving machine spent moving in the first direction as a function of the cumulative time the earthmoving machine spent in the first direction during said series of cycles and said number of cycles;

calculating an average of the time the earthmoving machine spent in moving in the second direction as a function of the cumulative time the earthmoving machine spent in the second direction during said series of cycles and said number of cycles; and

,

calculating a number of cycles per hour and an average cycle time as a function of the cumulative time the earthmoving machine spent in the first and second directions during said series of cycles, the cumulative time the earthmoving machine spent in idle during said series of cycles and said number of cycles.

10. A method for automatically determining the productivity of an earthmoving machine in real-time using an onboard computer, the earthmoving machine operating in cycles having a first portion and a second portion, the earthmoving machine moving in a first direction during the first portion and in a second direction during the second portion, comprising:

(1) for a series of cycles, detecting the start of each first portion and the start of each second portion of each cycle;

(2) determining a first machine parameter corresponding to the first portion of said each cycle in said series of cycles;

(3) determining a second machine parameter corresponding to the second portion of said each cycle in said series of cycles;

(4) calculating a first cycle parameter as a function of said at least one first machine parameter;

(5) calculating a second cycle parameter as a function of said at least one second machine parameter;

(6) calculating a first measure of productivity as a function of said at least one first cycle parameter; and

,

(7) calculating a second measure of productivity as a function of said at least one second cycle parameter.

11. A method for automatically determining the productivity of an earthmoving machine in real-time using an onboard computer, the earthmoving machine operating in cycles having a first portion and a second portion, the earthmoving machine moving in a first direction during the first portion and in a second direction during the second portion, comprising:

for a series of cycles, detecting the start of each cycle;

determining a start position of the earthmoving machine at the start of the first portion of each said cycle;

determining an end position of the earthmoving machine at the end of the first portion of each said cycle;

calculating a horizontal distance moved as a function of said start and end positions for each said cycle;

calculating a cumulative horizontal distance traversed corresponding to said series of cycles; and

calculating a measure of productivity as a function of said cumulative horizontal distance.

12. A method, as set forth in claim 11, wherein the step of calculating a measure of productivity further comprising the step of calculating an average horizontal distance traversed as a function of said cumulative horizontal distance.

13. A method for automatically determining the productivity of an earthmoving machine in real-time using an onboard computer, the earthmoving machine operating in cycles having a first portion and a second portion, the earthmoving machine moving in a first direction during the first portion and in a second direction during the second portion, comprising:

for a series of cycles, detecting the start of each cycle;

determining a start position of the earthmoving machine at the start of the first portion of each said cycle;

determining an end position of the earthmoving machine at the end of the first portion of each said cycle;

calculating a slope as a function of said start and end positions for each said cycle;

calculating a cumulative slope traversed corresponding to said series of cycles; and

calculating a measure of productivity as a function of said cumulative slope traversed.

14. A method, as set forth in claim 13, wherein the step of calculating a measure of productivity further comprising the step of calculating an average slope traversed as a function of said cumulative slope traversed.