System and method for monitoring payload distribution and machine including same

• US 10,395,445 B2
• Filed: 12/16/2016
• Issued: 08/27/2019
• Est. Priority Date: 12/16/2016
• Status: Active Grant

• Current Assignee: Caterpillar Incorporated
• Original Assignee: Caterpillar Incorporated
• Inventors: Pauli, Nathan S.
• Primary Examiner(s): Nguyen, Bao Long T
• Application Number:
  US15/382,043
• Publication Number:
  US 20180174382A1
• Time in Patent Office: 984 Days
• Field of Search: 701124, 701 37, 177136
• CPC Class Codes: B60G 17/017 characterised by their use when the vehicle is stationary, e.g. during loading, engine start-up or switch-off
• CPC Class Codes: B60G 2200/17 with a strut contributing to the suspension geometry by being articulated onto the wheel support
• CPC Class Codes: B60G 2300/02 Trucks; Load vehicles
• CPC Class Codes: B60G 2300/09 Construction vehicles, e.g. graders, excavators
• CPC Class Codes: B60G 2400/61 Load distribution
• CPC Class Codes: B60G 2400/824 Travel path sensing; Track monitoring
• CPC Class Codes: B60G 2401/16 GPS track data
• CPC Class Codes: B60G 2800/912 Attitude Control; levelling control
• CPC Class Codes: B60G 3/265 with a strut cylinder contributing to the suspension geometry by being linked to the wheel support via an articulation
• CPC Class Codes: G01G 19/08 for incorporation in vehicles
• CPC Class Codes: G01M 1/122 Determining position of centre of gravity
• CPC Class Codes: G01S 19/14 specially adapted for specific applications
• CPC Class Codes: G01S 19/42 Determining position
• CPC Class Codes: G07C 5/0825 using optical means
• CPC Class Codes: G07C 5/085 using electronic data carriers

Abstract

A machine includes a frame, a suspension system mounted to the frame and including a plurality of struts, and a payload distribution monitoring system supported by the frame. The payload distribution monitoring system includes pressure sensors respectively arranged with the struts, a computer-readable medium bearing a payload distribution monitoring program, a controller, and an interface device. The controller is in operable communication with the pressure sensors to receive their signals and configured to execute the payload distribution monitoring program. The interface device is in operable communication with the controller and configured to display the payload distribution monitoring program'"'"'s graphical user interface. The payload distribution monitoring program is configured to monitor the strut pressure signals for an unbalanced loading condition that occurs when a relative strut pressure differential, which is computed using the strut pressure signals from the pressure sensors, exceeds a differential limit.

Claims

1. A machine comprising:

a frame, the frame having a front end, a rear end in opposing relationship to the front end, a first side, and a second side in opposing relationship to the first side;

a body, the body mounted to the frame, the body including a payload support surface defining a payload storage area configured to hold a supply of material therein;

a suspension system, the suspension system mounted to the frame, the suspension system including a first front strut, a second front strut, a first rear strut, and a second rear strut, the first front strut and the second front strut disposed adjacent the front end of the frame and on the first side and the second side of the frame, respectively, and the first rear strut and the second rear strut disposed adjacent the rear end of the frame and on the first side and the second side of the frame, respectively, the first front strut, the second front strut, the first rear strut, and the second rear strut being placed in supporting relationship with the body to support the supply of material disposed within the body;

a payload distribution monitoring system, the payload distribution monitoring system supported by the frame and including;

a plurality of pressure sensors, the plurality of pressure sensors respectively arranged with the first front strut, the second front strut, the first rear strut, and the second rear strut to sense a strut pressure therewithin, the plurality of pressure sensors each configured to generate a strut pressure signal indicative of the strut pressure sensed by the respective one of the plurality of pressure sensors,

a non-transitory computer-readable medium, the non-transitory computer-readable medium bearing a payload distribution monitoring program, the payload distribution monitoring program including a graphical user interface,

a geolocation unit, the geolocation unit configured to generate a location signal indicative of a location of the machine,

a controller, the controller in operable communication with each of the plurality of pressure sensors to respectively receive the strut pressure signal therefrom, the controller in operable arrangement with the non-transitory computer-readable medium such that the controller is configured to execute the payload distribution monitoring program contained thereon, the controller in operable communication with the geolocation unit to receive the location signal therefrom,

an interface device, the interface device in operable communication with the controller, the interface device configured to display the graphical user interface of the payload distribution monitoring program,

wherein the payload distribution monitoring program includes a strut pressure monitoring module, a messaging module, and a tracking module, the strut pressure monitoring module configured to monitor for an unbalanced loading condition within the body based upon a relative strut pressure differential exceeding a differential limit, the strut pressure monitoring module being configured to compute the relative strut pressure differential using the strut pressure signal associated with each of the first front strut, the second front strut, the first rear strut, and the second rear strut, the messaging module being configured to display, through the graphical user interface, an unbalanced loading indicator in the interface device indicating that the unbalanced loading condition occurred once the relative strut pressure differential exceeds the differential limit, and the tracking module configured to track the location of the machine when the unbalanced loading condition occurred,

wherein the controller is configured to transmit an unbalanced loading event signal, the unbalanced loading event signal containing strut pressure data, corresponding location data, and unbalanced loading event data indicating the unbalanced loading condition occurred and a time and place of occurrence for the unbalanced loading condition.

2. The machine according to claim 1, wherein the strut pressure monitoring module of the payload distribution monitoring program is configured to compute the relative strut pressure differential by at least determining a difference between a first sum of the strut pressure of two of the first front strut, the second front strut, the first rear strut, and the second rear strut and a second sum of the strut pressure of the other two of the first front strut, the second front strut, the first rear strut, and the second rear strut.

3. The machine according to claim 1, further comprising:

an operator compartment supported by the frame;

wherein the interface device is mounted within the operator compartment.

4. The machine according to claim 1, further comprising:

a ground-engaging system, the ground-engaging system mounted to the frame such that the suspension system is interposed between the frame and the ground-engaging system.

5. The machine according to claim 4, wherein the ground-engaging system includes a first front wheel, a second front wheel, a front axle, a first rear wheel, a second rear wheel, and a rear axle, the first front wheel and the second front wheel respectively disposed on the first side and the second side of the frame and both rotatably mounted to the front axle, the front axle disposed adjacent the front end of the frame, the first rear wheel and the second rear wheel respectively disposed on the first side and the second side of the frame and both rotatably mounted to the rear axle, the rear axle disposed adjacent the rear end of the frame, and wherein the suspension system is mounted to the frame such that the suspension system is interposed between the frame and the ground-engaging system, the first front strut and the second front strut interposed between the frame and the first front wheel and the second front wheel, respectively, and the first rear strut and the second rear strut interposed between the frame and the first rear wheel and the second rear wheel, respectively.

6. The machine according to claim 1, wherein the payload distribution monitoring system further includes a communication device, the communication device in operable arrangement with the controller to communicatively transmit the unbalanced loading event signal to a receiver unsupported by the frame.

7. A system for monitoring a payload distribution of a machine, the machine including a frame and a suspension system, the suspension system mounted to the frame and including a first front strut, a second front strut, a first rear strut, and a second rear strut, the system comprising:

a plurality of pressure sensors, the plurality of pressure sensors adapted to be respectively arranged with the first front strut, the second front strut, the first rear strut, and the second rear strut to sense a strut pressure therewithin, the plurality of pressure sensors each configured to generate a strut pressure signal indicative of the strut pressure sensed by the respective one of the plurality of pressure sensors;

a non-transitory computer-readable medium, the non-transitory computer-readable medium bearing a payload distribution monitoring program, the payload distribution monitoring program including a graphical user interface;

a geolocation unit, the geolocation unit configured to generate a location signal indicative of a location of the machine;

a controller, the controller in operable communication with each of the plurality of pressure sensors to respectively receive the strut pressure signal therefrom, the controller in operable arrangement with the non-transitory computer-readable medium such that the controller is configured to execute the payload distribution monitoring program contained thereon;

an interface device, the interface device in operable communication with the controller, the interface device configured to display the graphical user interface of the payload distribution monitoring program;

wherein the payload distribution monitoring program includes a strut pressure monitoring module, a messaging module, and a tracking module, the strut pressure monitoring module configured to monitor for an unbalanced loading condition within the machine based upon a relative strut pressure differential exceeding a differential limit, the strut pressure monitoring module being configured to compute the relative strut pressure differential using the strut pressure signal associated with each of the first front strut, the second front strut, the first rear strut, and the second rear strut, the messaging module being configured to display, through the graphical user interface, an unbalanced loading indicator in the interface device indicating that the unbalanced loading condition occurred once the relative strut pressure differential exceeds the differential limit, and the tracking module configured to track the location of the machine when the unbalanced loading condition occurred; and

a data storage device, the data storage device in operable communication with the controller, the data storage device including a database of loading condition data for a worksite, the database of loading condition data including a set of unbalanced loading condition events and a set of payload hazard locations corresponding to the set of unbalanced loading condition events.

8. The system according to claim 7, wherein the strut pressure monitoring module of the payload distribution monitoring program is configured to compute the relative strut pressure differential by at least determining a difference between a first sum of the strut pressure of two of the first front strut, the second front strut, the first rear strut, and the second rear strut and a second sum of the strut pressure of the other two of the first front strut, the second front strut, the first rear strut, and the second rear strut.

9. The system according to claim 8, wherein the first sum comprises the strut pressure of the first front strut and the second front strut, and the second sum comprises the strut pressure of the first rear strut and the second rear strut.

10. The system according to claim 8, wherein the first sum comprises the strut pressure of the first front strut and the first rear strut, and the second sum comprises the strut pressure of the second front strut and the second rear strut.

11. The system according to claim 7, wherein the data storage device includes a database of loading condition data for a worksite, including a historical set of strut pressure data corresponding to a plurality of locations at the worksite;

and wherein the differential limit used by the strut pressure monitoring module to determine whether the unbalanced loading condition has occurred is based upon the historical set of strut pressure data occurring at the location.

12. The system according to claim 11, wherein the machine comprises a first machine, and wherein the database of loading condition data includes data received from at least a second machine equipped with a corresponding second set of struts and a corresponding second set of pressure sensors.

13. The system according to claim 7, wherein the payload distribution monitoring program includes a mapping module, the mapping module being configured to generate a payload hazard map of the worksite using the database of loading condition data in the data storage device, the payload hazard map including a payload hazard indicator at each of the set of payload hazard locations for the set of unbalanced loading condition events.

14. The system according to claim 7, wherein the tracking module is configured to compare the location of the machine with the set of payload hazard locations to determine when the machine is within a predetermined payload hazard distance from at least one of the set of payload hazard locations, and the messaging module is configured to display, through the graphical user interface, a payload hazard-approaching indicator in the interface device indicating that the machine is approaching a hazardous area when the tracking module determines the machine is within the predetermined payload hazard distance.

15. A method of monitoring a payload distribution of a machine, the machine including a frame and a suspension system, the suspension system mounted to the frame and including a first front strut, a second front strut, a first rear strut, and a second rear strut, the method comprising:

sensing a strut pressure within each of the first front strut, the second front strut, the first rear strut, and the second rear strut with a respective one of a plurality of pressure sensors to generate a strut pressure signal indicative of the strut pressure sensed by the respective one of the plurality of pressure sensors;

transmitting the strut pressure signal of each of the plurality of pressure sensors to a controller;

using the controller to execute a payload distribution monitoring program stored upon a non-transitory computer-readable medium to determine whether an unbalanced loading condition occurred based upon the strut pressure signal associated with each of the first front strut, the second front strut, the first rear strut, and the second rear strut;

in response to the payload distribution monitoring program determining the unbalanced loading condition occurred, using the controller to execute the payload distribution monitoring program to display, through a graphical user interface, an unbalanced loading indicator in an interface device indicating the unbalanced loading condition occurred;

operating a geolocation unit to generate a location signal indicative of a location of the machine;

transmitting the location signal to the controller;

in response to the payload distribution monitoring program determining the unbalanced loading condition occurred, using the controller to execute the payload distribution monitoring program to track the location of the machine when the unbalanced loading condition occurred.