Reteachable switching circuit with ability for locking

• US 8,482,376 B2
• Filed: 11/02/2009
• Issued: 07/09/2013
• Est. Priority Date: 11/02/2009
• Status: Active Grant

• Current Assignee: Rockwell Automation Technologies Incorporated (Rockwell Automation, Inc.)
• Original Assignee: Rockwell Automation Technologies Incorporated (Rockwell Automation, Inc.)
• Inventors: Foster, Wayne R., Vavra, Joshua D., Tambeau, Steven R.
• Primary Examiner(s): Wu, Daniel
• Assistant Examiner(s): Adnan, Muhammad
• Application Number:
  US12/610,793
• Publication Number:
  US 20110102132A1
• Time in Patent Office: 1,345 Days
• Field of Search: 340 51- 592, 340500-599
• US Class Current: 340/5.1
• CPC Class Codes: G07C 9/28 the pass enabling tracking or indicating presence
• CPC Class Codes: H03K 17/00 Electronic switching or gating, i.e. not by contact-making and –breaking gated amplifiers H03F3/72; switching arrangements for exchange systems using static devices H04Q3/52
• CPC Class Codes: H03K 2217/94089 Wireless transmission

Abstract

A method for teaching a switching circuit is provided. The method includes presenting a target within a sensing range of a sensor of the switching circuit for a pre-determined duration and acquiring an identification code of the target via the sensor. The method also includes storing the acquired identification code for operating the switching circuit and locking the switching circuit against learning identification codes of any other target prior to reaching an allowed number of reteaching attempts.

Claims

1. A method for teaching a switching circuit, comprising:

presenting a target within a sensing range of a sensor of the switching circuit for a pre-determined duration;

acquiring an identification code of the target via the sensor;

storing the acquired identification code for operating the switching circuit; and

locking the switching circuit against learning identification codes of any other target having an identification code that matches one of a pre-determined number of identification codes previously presented within the sensing range of the sensor when the target is re-presented within the sensing range within a pre-determined period.

2. The method of claim 1, wherein the sensor is disposed on a stationary component and the target comprises an actuator disposed on a movable component within the sensing range of the sensor.

3. The method of claim 1, wherein the pre-determined duration is about 15 seconds.

4. The method of claim 1, comprising detecting the target within the sensing range of the sensor through radio-frequency identification.

5. The method of claim 1, wherein locking the switching circuit comprises:

moving the target outside the sensing range of the sensor; and

re-presenting the target within the sensing range of the sensor within a pre-determined period.

6. The method of claim 5, wherein the moving and re-presenting steps are performed at least once within the pre-determined period.

7. The method of claim 6, wherein duration of the pre-determined period is about 15 seconds.

8. The method of claim 1, wherein the pre-determined number of identification codes is 8.

9. The method of claim 1, further comprising operating the switching circuit with the acquired identification code of the target presented.

10. A method for teaching a switching circuit, comprising:

presenting a target within a sensing range of a sensor of the switching circuit for a pre-determined duration;

acquiring an identification code of the target via the sensor;

storing the acquired identification code for operating the switching circuit;

moving the target outside the sensing range of the sensor; and

re-presenting the target within the sensing range of the sensor within a pre-determined period to lock the switching circuit against learning identification codes of any other target having an identification code that matches one of a pre-determined number of identification codes previously presented within the sensing range of the sensor.

11. The method of claim 10, wherein the sensor is disposed on a stationary component and the target comprises an actuator disposed on a movable component within the sensing range of the sensor.

12. The method of claim 10, wherein moving the target comprises opening the movable component to move the target outside the sensing range of the switch and re-presenting the target comprises closing the movable component to re-present the target within the sensing range of the switch.

13. The method of claim 12, wherein the opening and closing steps are performed at least once within a pre-determined duration.

14. The method of claim 13, wherein the pre-determined duration is about 15 seconds.

15. A reteachable switching circuit, comprising:

a non-contact sensor;

a target movable into and out of a sensing range of the sensor; and

a processor configured to reprogram the switching circuit for operation of the switching circuit based upon an identification code of the target and to lock the switching circuit against further reteaching based upon other identification codes of any other target having an identification code that matches one of a pre-determined number of identification codes previously presented within the sensing range of the sensor when the target is moved into, out of, and back into the sensing range within a pre-determined period.

16. The reteachable switching circuit of claim 15, further comprising a memory configured to store the identification code of the target.

17. The reteachable switching circuit of claim 15, wherein the sensor is disposed on a stationary component and the target comprises an actuator disposed on a movable component.

18. The reteachable switching circuit of claim 15, wherein the sensor generates a radio frequency field at approximately 125 kHz, and the target is a passive resonant circuit that responds to excitation by the radio frequency field.

19. The reteachable switching circuit of claim 15, wherein the pre-determined number of identification codes is 8.

20. The reteachable switching circuit of claim 15, wherein the identification code of the target comprises a 16 bit word.