CONTROLLING A DIGGING OPERATION OF AN INDUSTRIAL MACHINE

• US 20140129094A1
• Filed: 10/28/2013
• Published: 05/08/2014
• Est. Priority Date: 04/29/2011
• Status: Active Grant

• Current Assignee: Joy Global Surface Mining Inc. (Mitsui & Company Limited)
• Original Assignee: Harnischfeger Technologies Inc. (Mitsui & Company Limited)
• Inventors: Colwell, Joseph, Hren, William, Wendt, David, Linstroth, Michael
• Granted Patent: US 8,825,317 B2
• Time in Patent Office: Days
• US Class Current: 701/50
• CPC Class Codes: E02F 3/304 with the dipper-arm slidably mounted on the boom E02F3/305 takes precedence
• CPC Class Codes: E02F 3/308 working outwardly
• CPC Class Codes: E02F 3/352 Buckets movable along a fixed guide
• CPC Class Codes: E02F 3/43 Control of dipper or bucket position; Control of sequence of drive operations
• CPC Class Codes: E02F 3/431 for bucket-arms, front-end loaders, dumpers or the like
• CPC Class Codes: E02F 3/432 for keeping the bucket in a predetermined position or attitude
• CPC Class Codes: E02F 3/435 for dipper-arms, backhoes or the like
• CPC Class Codes: E02F 3/46 with reciprocating digging or scraping elements moved by cables or hoisting ropes ; Drives or control devices therefor E02F3/205, E02F3/905 take precedence
• CPC Class Codes: E02F 5/025 with scraper-buckets, dippers or shovels
• 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: E02F 9/2029 Controlling the position of implements in function of its load, e.g. modifying the attitude of implements in accordance to vehicle speed control for hydraulic or pneumatic drives E02F9/2203, E02F9/2221 and E02F9/2253 take precedence
• CPC Class Codes: E02F 9/26 Indicating devices E02F5/145 takes precedence
• CPC Class Codes: E02F 9/265 with follow-up actions (e.g. control signals sent to actuate the work tool)

Abstract

Systems, methods, devices, and computer readable media for controlling a digging operation of an industrial machine that includes a dipper and a crowd drive. A method includes determining an acceleration associated with the industrial machine, determining a crowd retract factor based on the acceleration, comparing the crowd retract factor to a threshold crowd retract factor, setting a crowd speed reference and a crowd retract torque for the crowd drive for a period of time based on the comparison of the crowd retract factor to the threshold crowd retract factor.

Claims

1. An industrial machine comprising:

a dipper;

a crowd motor drive configured to provide one or more control signals to a crowd motor, the crowd motor being operable to provide a force to the dipper to move the dipper toward or away from a bank; and

a controller connected to the crowd motor drive, the controller configured to

determine an impact of the dipper,

determine a crowd retract factor based on the impact of the dipper,

compare the crowd retract factor to a threshold crowd retract factor, and

set a parameter for the crowd motor drive based on the comparison of the crowd retract factor to the threshold crowd retract factor.