Granted Patent B2

US 7,647,134 · App. 11/856,729 · Granted Jan 12, 2010

Abstract

Claims (50)

1. A method of operating a temperature management device, the method comprising:

determining a predetermined format for a probe;

transmitting towards the temperature management device the probe having the predetermined format;

receiving a probe response, the probe response being representative of at least one dynamic operational characteristic of the temperature management device, said dynamic operational characteristic being responsive to the predetermined format of the probe;

analyzing the probe response to obtain a control parameter suitable for controlling operation of the temperature management device.

2. The method of claim 1 , wherein the predetermined format comprises a predetermined pattern.

3. The method of claim 2 , wherein said pre-determined pattern comprises a square wave pattern that is configured to control at least amplitude of fluctuation of a duty cycle setting conveyed to the temperature management device.

4. The method of claim 2 , wherein said predetermined pattern comprises a square wave pattern that is configured to control frequency and amplitude of fluctuation of a duty cycle setting conveyed to the temperature management device.

5. The method of claim 1 , wherein said temperature management device forms, when in use, part of a molding machine; and wherein said temperature management device comprises one of:

a barrel heater associated with an injection unit;

a hot runner heater;

an air conditioner;

a dehumidifier.

6. The method of claim 1 , wherein said analyzing comprises calculating an average peak value (A PEAK ) and an average frequency value (A FREQUENCY ) of fluctuation of the probe response.

7. The method of claim 6 , further comprising recalculating said average peak value (A PEAK ) and said average frequency value (A FREQUENCY ) until a validation parameter is satisfied.

8. The method of claim 7 , further comprising calculating said validation parameter.

9. The method of claim 7 , further comprising calculating said control parameter based on at least said average peak value (A PEAK ), said average frequency value (A FREQUENCY ) and said predetermined format.

10. The method of claim 1 , wherein said temperature management device comprises a first temperature management device and a second temperature management device, and wherein said transmitting comprises:

transmitting a first probe having a first predetermined format to said first temperature management device; and

transmitting a second probe having a second predetermined format to said second temperature management device.

11. The method of claim 10 , wherein said first predetermined format and said second predetermined format are the same.

12. The method of claim 11 , wherein said receiving comprises:

receiving a first probe response responsive to said first probe; and

receiving a second probe response responsive to said second probe.

13. The method of claim 12 , wherein said analyzing the probe response to obtain a control parameter suitable for controlling the temperature management device comprises:

analyzing said first probe response to obtain a first control parameter suitable for controlling the first temperature management device; and

analyzing said second probe response to obtain a second control parameter suitable for controlling the second temperature management device.

14. The method of claim 1 , wherein said temperature management device is associated with a controller and wherein:

said transmitting to the temperature management device a probe comprises transmitting said probe to the controller; and

said receiving a probe response comprises receiving said probe response from the controller.

15. The method of claim 14 , wherein said controller comprises a Proportional-Integral-Differential (PID) controller and wherein said control parameter comprises a set of constants, the set of constants including a K I (integral gain) constant, a K P (proportional gain) constant and a K D (derivative gain) constant.

16. The method of claim 14 , further comprising transmitting an indication of said control parameter to said controller.

17. The method of claim 1 , wherein said determining said predetermined format comprises calculating a probe parameter.

18. The method of claim 17 , wherein said probe parameter comprises a first probe parameter (A RANGE ) and a second probe parameter (V FREQUENCY ), the first probe parameter (A RANGE ) being indicative of a range for a duty cycle setting and the second probe parameter (V FREQUENCY ) being indicative of a frequency of change of the duty cycle setting.

19. The method of claim 18 , wherein said probe parameter comprises a first probe parameter (A RANGE ), the first probe parameter (A RANGE ) being indicative of a range for a duty cycle setting and wherein a change in duty cycle setting within the range for a duty cycle setting is triggered when a temperature associated with the temperature management device reaches a set point.

20. A computing apparatus configured to be coupled to a controller of a temperature management device, the computing apparatus configured to:

determine a predetermine format for a probe;

transmit to the controller the probe having the pre-determined format;

receive from the controller a probe response, the probe response indicative of at least one dynamic operational characteristic of the temperature management device, said at least one dynamic operational characteristic being responsive to the predetermined format of the probe;

analyze the probe response to obtain a control parameter suitable for enabling the controller to control operation of the temperature management device.

21. The computing apparatus of claim 20 , wherein the predetermined format comprises a square wave pattern that is configured to control one of:

at least an amplitude of fluctuation of a duty cycle setting conveyed to the temperature management device; and

frequency and amplitude of fluctuation of a duty cycle setting conveyed to the temperature management device.

22. The computing apparatus of claim 21 , wherein said temperature management device forms, when in use, part of a molding machine.

23. The computing apparatus of claim 22 , wherein said temperature management device comprises one of:

a barrel heater associated with an injection unit;

a hot runner heater;

an air conditioner;

a dehumidifier.

24. The method of claim 1 , further comprising repeating said receiving and analyzing steps until a validation parameter is satisfied.

Assignments (11)