US 12,480,285 B2
Repose-optimized material stockpiling tool path
Shaun David Currier, Naperville, IL (US)
Assigned to Caterpillar Inc., Peoria, IL (US)
Filed by Caterpillar Inc., Peoria, IL (US)
Filed on Feb. 1, 2024, as Appl. No. 18/429,518.
Prior Publication US 2025/0250772 A1, Aug. 7, 2025
Int. Cl. E02F 9/26 (2006.01); E02F 3/43 (2006.01)
CPC E02F 9/262 (2013.01) [E02F 3/434 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A method of controlling a machine, the method comprising:
receiving, by one or more processors and from one or more sensors, measurements indicative of one or more geometric characteristics of a material pile;
determining, by the one or more processors, an actual angle of repose for a material of the material pile according to the geometric characteristics of the material pile;
identifying one or more material properties of the material;
determining, by the one or more processors, a target angle of repose for the material pile according to at least one of a maximum value of the actual angle of repose or the one or more material properties;
determining, by the one or more processors, an optimized travel path for a tool through a portion of the material pile, according to the actual angle of repose and the target angle of repose for the material; and
causing the tool to be actuated along at least a first portion of the optimized travel path, wherein the tool, when actuated, engages a portion of the material of the material pile and lifts the portion of the material to a top of the material pile such that the remaining material of the material pile has an angle of repose that is substantially equal to the target angle of repose.
 
13. A system comprising:
a control circuit comprising one or more processors and memory structured to store instructions that, when executed by the one or more processors, cause the control circuit to:
receive, by one or more processors, measurements from a sensor indicative of one or more geometric characteristics of a material pile;
determine, by the one or more processors, an actual angle of repose for a material of the material pile according to the geometric characteristics of the material pile;
identify, by the one or more processors, one or more material properties of the material;
determine, by the one or more processors, a target angle of repose for the material pile according to the one or more material properties;
calculate, by the one or more processors, an optimized travel path for a tool through a portion of the material pile according to the actual angle of repose and the target angle of repose for the material; and
cause the tool to be actuated along at least a first portion of the optimized travel path, wherein the tool, when actuated, engages a portion of the material of the material pile and lifts the portion of material to a top of the material pile such that the remaining material of the material pile has an angle of repose that is substantially equal to the target angle of repose.
 
21. A system comprising:
a tool configured to lift a material from a material pile;
a sensor configured to measure an actual angle of repose of the material pile;
a control circuit comprising one or more processors and memory structured to store instructions that, when executed by the one or more processors, cause the control circuit to:
receive, by one or more processors from one or more sensors, measurements indicative of one or more geometric characteristics of a material pile;
determine, by the one or more processors, an actual angle of repose for a material of the material pile according to the geometric characteristics of the material pile;
identify one or more material properties of the material;
determine, by the one or more processors, a target angle of repose for the material pile according to the one or more material properties;
calculate, by the one or more processors, an optimized travel path for a tool through a portion of the material pile according to the actual angle of repose and the target angle of repose for the material; and
cause the tool to be actuated along at least a first portion of the optimized travel path, wherein the tool, when actuated, engages a portion of the material of the material pile and lifts the portion of material to a top of the material pile such that the remaining material of the material pile has an angle of repose that is substantially equal to the target angle of repose.