Adaptive load compensation for an industrial machine

Patent metadata

Field	Value
Publication number	US-2016017573-A1
Application number	US-201514799660-A
Country	US
Kind code	A1
Filing date	Jul 15, 2015
Priority date	Jul 15, 2014
Publication date	Jan 21, 2016
Grant date	—

Abstract

An industrial machine that includes a dipper, a crowd actuation device, a hoist actuation device, a swing actuation device, one or more sensors, and a controller. The one or more sensors generate one or more signals related to a load within the dipper. The one or more signals are received by the controller. The controller determines, based on the one or more signals, whether the industrial machine is operating in an over-loaded condition by comparing a suspended load to a suspended load threshold value. If the suspended load is greater or equal to the suspended load threshold value, the controller takes an action to control the industrial machine. The action taken by the controller can include increasing, decreasing, or otherwise modifying a speed parameter or speed limit, increasing, decreasing, or otherwise modifying a force parameter, etc.

First claim

What is claimed is:

1 . An industrial machine comprising:
a dipper, an actuator operable to control a movement of the dipper; a sensor operable to generate a signal related to a weight of material in the dipper, and a controller including a processor and a memory and programmed to
receive the signal related to the weight of material in the dipper from the sensor,
determine a suspended load based on the signal,
compare the suspended load to a threshold value,
modify a value of an operating parameter of the actuator when the suspended load is greater than the threshold value, and
operate the industrial machine with the operating parameter at the modified value.

2 . The industrial machine of claim 1 , wherein the actuator is a swing actuator.

3 . The industrial machine of claim 2 , wherein the swing actuator is a swing motor.

4 . The industrial machine of claim 3 , wherein the operating parameter of the swing motor is a speed of the swing motor.

5 . The industrial machine of claim 3 , wherein the operating parameter of the swing motor is a torque of the swing motor.

6 . The industrial machine of claim 1 , wherein the actuator is a hoist actuator.

7 . The industrial machine of claim 6 , wherein the hoist actuator is a hoist motor.

8 . The industrial machine of claim 7 , wherein the operating parameter of the hoist motor is a speed of the hoist motor.

9 . The industrial machine of claim 7 , wherein the operating parameter of the hoist motor is a torque of the hoist motor.

10 . The industrial machine of claim 1 , further comprising a second sensor operable to generate a second signal related to a dipper trip condition of the industrial machine.

11 . The industrial machine of claim 10 , further comprising a dipper door, and wherein the trip condition is the dipper door opening.

12 . The industrial machine of claim 1 , wherein the suspended load is an average suspended load of the dipper.

13 . A method of controlling a movement of a dipper of an industrial machine, the method comprising:
receiving a signal related to a weight of material in the dipper from a sensor; determining a suspended load based on the signal; comparing the suspended load to a threshold value; modifying a value of an operating parameter of an actuator when the suspended load is greater than the threshold value, the actuator operable to control a movement of the dipper; and operating the industrial machine with the operating parameter at the modified value.

14 . The method of claim 13 , wherein the actuator is selected from the group consisting of a swing actuator and a hoist actuator.

15 . The method of claim 14 , wherein the actuator is a motor.

16 . The method of claim 15 , wherein the operating parameter of the motor is a speed of the motor.

17 . The method of claim 16 , wherein the operating parameter of the motor is a torque of the motor.

18 . The method of claim 13 , receiving a second signal related to a dipper trip condition of the industrial machine from a second sensor.

19 . The method of claim 18 , wherein the dipper trip condition is a dipper door opening.

20 . The method of claim 13 , wherein the suspended load is an average suspended load of the dipper.

21 . A controller including a processor and a memory, the controller comprising executable instructions stored in the memory to:
receive a signal related to a weight of material in the dipper from a sensor; determine a suspended load based on the signal; compare the suspended load to a threshold value; modify a value of an operating parameter of an actuator when the suspended load is greater than the threshold value, the actuator operable to control a movement of the dipper; and generate a control signal to operate the industrial machine with the operating parameter at the modified value.

22 . The controller of claim 21 , wherein the suspended load is an average suspended load of the dipper.

23 . The controller of claim 21 , wherein the suspended load is an instantaneous suspended load of the dipper.

24 . The controller of claim 21 , wherein the actuator is a motor and the operating parameter is a speed of the motor.

25 . The controller of claim 21 , wherein the actuator is a motor and the operating parameter is a torque of the motor.

Assignees

• Harnischfeger Tech Inc

Inventors

• Colwell Joseph J
• Linstroth Michael J
• Voelz Nicholas R

Classifications

• E02F3/308

  working outwardly · CPC title

• E02F3/46

  with reciprocating digging or scraping elements moved by cables or hoisting ropes {; Drives or control devices therefor (E02F3/205, E02F3/905 take precedence)} · CPC title

• E02F9/2029 Primary

  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 title

• E02F9/265

  with follow-up actions (e.g. control signals sent to actuate the work tool) · CPC title

• E02F3/435

  for dipper-arms, backhoes or the like · CPC title