Systems and methods for control of a workpiece heating system

Patent metadata

Field	Value
Publication number	US-2016014850-A1
Application number	US-201514737193-A
Country	US
Kind code	A1
Filing date	Jun 11, 2015
Priority date	Jul 14, 2014
Publication date	Jan 14, 2016
Grant date	—

Abstract

A heating system includes a heating head assembly configured to move relative to a workpiece. The heating system may also include a temperature sensor assembly configured to detect a temperature of the workpiece and/or a travel sensor assembly configured to detect a position, movement, or direction of movement of the heating head assembly relative to the workpiece, and to transmit feedback signals to a controller configured to adjust the power provided to the heating head assembly by a power source based at least in part on the feedback signals. In addition, certain control techniques that take into account certain parameters, such as physical parameters of the workpiece being heated, the heating process parameters, and so forth, may be implemented.

First claim

1 . A heating system comprising:
control circuitry configured to automatically control a rate of change of an output power delivered from a power source to a heating device configured to generate heat using the output power to heat a workpiece, wherein the control circuitry is configured to automatically control the rate of change of the output power based at least in part on a model relating to the workpiece.

2 . The heating system of claim 1 , wherein the model includes physical parameters of the workpiece, and the control circuitry is configured to automatically control the rate of change of the output power based at least in part on the physical parameters of the workpiece.

3 . The heating system of claim 2 , wherein the physical parameters of the workpiece include a material type of the workpiece, a diameter of the workpiece, a length of the workpiece, or a thickness of the workpiece.

4 . The heating system of claim 2 , wherein data relating to the physical parameters of the workpiece is stored in or retrieved from a memory medium of the control circuitry.

5 . The heating system of claim 2 , wherein data relating to the physical parameters of the workpiece is stored in or retrieved from an external data source.

6 . The heating system of claim 5 , wherein the external data source is cloud storage to which the control circuitry is communicatively connected.

7 . The heating system of claim 5 , wherein the external data source is a removable memory medium to which the control circuitry is communicatively connected.

8 . The heating system of claim 5 , wherein the data relating to the physical parameters of the workpiece is retrieved via a wireless connection with the external data source.

9 . The heating system of claim 2 , wherein data relating to the physical parameters of the workpiece is optically read from the workpiece by an optical reader device communicatively connected to the control circuitry.

10 . The heating system of claim 2 , wherein data relating to the physical parameters of the workpiece is electromagnetically read from the workpiece by an electromagnetic reader device communicatively connected to the control circuitry.

11 . The heating system of claim 1 , wherein the model includes process parameters relating to the delivery of the output power to the heating device or the generation of the heat by the heating device, and the control circuitry is configured to automatically control the rate of change of the output power based at least in part on the process parameters.

12 . The heating system of claim 11 , wherein the process parameters include a travel speed of the heating device with respect to the workpiece, a travel path of the heating device with respect to the workpiece, an absolute or relative position of the heating device with respect to the workpiece, an inductive coupling between the heating device and the workpiece, an output power factor of the output power, an output power frequency of the output power, or an output current of the output power.

13 . The heating system of claim 11 , wherein data relating to the process parameters is stored in or retrieved from a memory medium of the control circuitry.

14 . The heating system of claim 11 , wherein data relating to the process parameters is stored in or retrieved from an external data source.

15 . The heating system of claim 14 , wherein the external data source is cloud storage to which the control circuitry is communicatively connected.

16 . The heating system of claim 14 , wherein the external data source is a removable memory medium to which the control circuitry is communicatively connected.

17 . The heating system of claim 14 , wherein the data relating to the physical parameters of the workpiece is retrieved via a wireless connection with the external data source.

18 . The heating system of claim 11 , wherein data relating to the process parameters is optically read from the workpiece by an optical reader device communicatively connected to the control circuitry.

19 . The heating system of claim 11 , wherein data relating to the process parameters is electromagnetically read from the workpiece by an electromagnetic reader device communicatively connected to the control circuitry.

20 . The induction heating system of claim 11 , wherein the model includes weld setting parameters, and the control circuitry is configured to automatically control the rate of change of the output power based at least in part on the weld setting parameters.

21 . The heating system of claim 1 , wherein the model indicates thicknesses of the workpiece at various locations along the workpiece, and the control circuitry is configured to automatically control the rate of change of the output power based at least in part on the thicknesses of the workpiece at the various locations.

22 . The heating system of claim 1 , wherein the model includes a three-dimensional representation of the workpiece, and the control circuitry is configured to automatically control the rate of change of the output power based at least in part on the three-dimensional representation of the workpiece.

23 . The heating system of claim 22 , wherein the control circuitry is configured to receive the three-dimensional representation of the workpiece from an external data source.

24 . The heating system of claim 23 , wherein the external data source is cloud storage to which the control circuitry is communicatively connected.

25 . The heating system of claim 23 , wherein the external data source is a removable memory medium to which the control circuitry is communicatively connected.

26 . The heating system of claim 23 , wherein the data relating to the physical parameters of the workpiece is retrieved via a wireless connection with the external data source.

27 . The heating system of claim 25 , wherein the control circuitry is configured to generate the three-dimensional representation of the workpiece.

28 . The heating system of claim 25 , wherein the control circuitry is configured to generate or update the three-dimensional representation of the workpiece during generation of the heat by the heating device.

29 . The heating system of claim 1 , wherein the model is generated or updated based on a step response relationship of a known change in output power and a resulting change in temperature of the workpiece.

30 . The heating system of claim 1 , wherein the control circuitry is configured to automatically update the model during generation of the heat by the heating device.

31 . The heating system of claim 1 , wherein the control circuitry is configured to automatically control the rate of change of the output power by limiting a proportional-integral-derivative (PID) control loop based at least in part on the model.

32 . The heating system of claim 1 , wherein the control circuitry is configured to automatically control the rate of change of the output power by limiting a state variable control method.

33 . The heating system of claim 1 , wherein the model is configured to predict a temperature at a location of the workpiece where the temperature is not directly measurable.

34 . The heating system of claim 33 , wherein the control circuitry is configured to account fo

Assignees

• Illinois Tool Works

Inventors

• Verhagen Paul David
• Joyce Richard Charles
• Mlnarik Kevin John

Classifications

• H05B6/08 Primary

  using compensating or balancing arrangements · CPC title

• H05B3/0038

  for industrial applications · CPC title

• H05B6/102 Primary

  the metal pieces being rotated while induction heated · CPC title

• H05B1/023

  Industrial applications · CPC title

• H05B6/06

  Control, e.g. of temperature, of power · CPC title