Encoding apparatus and method of using the same

• US 20080186177A1
• Filed: 02/05/2007
• Published: 08/07/2008
• Est. Priority Date: 02/05/2007
• Status: Abandoned Application

• Current Assignee: Intermec IP Corporation (Honeywell International Inc.)
• Original Assignee: Intermec IP Corporation (Honeywell International Inc.)
• Inventors: Martinez, Rene, Nikitin, Pavel, Kodukula, Venkata, Frank, Markus
• Application Number:
  US11/702,941
• Publication Number:
  US 20080186177A1
• Time in Patent Office: Days
• US Class Current: 340/572.1
• CPC Class Codes: G06K 7/10079 the collision being resolved in the spatial domain, e.g. temporary shields for blindfolding the interrogator in specific directions
• CPC Class Codes: G06K 7/10089 the interrogation device using at least one directional antenna or directional interrogation field to resolve the collision direction or location finding, such as triangulation techniques, G01S13/00
• CPC Class Codes: G06K 7/10217 parameter settings controlling the transmission power of the interrogator

Abstract

A media processing apparatus includes a self-calibrating encoding assembly that send read/write inquires to determine appropriate power levels for encoding encodable objects. The apparatus includes a control subsystem that tracks the power levels of the encoding assembly and the corresponding positions of media carrying the encodable objects. The controller then determines an encoding window and an encoding power level at which the encoding assembly encodes an encodable object in the encoding power window without unwanted communication to encodable objects outside of the window.

Claims

1. An apparatus for preparing media, the media including a plurality of encodable objects spaced from one another along a length of the media, the apparatus comprising:

a media path along which the media travels;

a write subsystem configured to wirelessly transmit information for successively encoding the encodable objects as each of the encodable objects is proximate a first position along the media path;

a read subsystem configured to read information encoded in at least one of the encodable objects, if any, and to provide a signal indicative of whether the write subsystem has encoded the information in at least one of the encodable object; and

a control subsystem communicatively coupled to the write subsystem and the read subsystem and configured to advance the media along the media path in response to the signal from the read subsystem indicating that the write subsystem has encoded the information on a respective one of the encodable objects and to wirelessly retransmit the information at a higher power level in response to the signal from the read subsystem indicating that information previously transmitted by the write subsystem was not encoded on the respective one of the encodable objects.

2. The apparatus of claim 1 wherein the control subsystem is configured to adjust a power level of an initial wireless transmission of information to a next one of the encodable objects based at least in part on a power level of a wireless transmission at which information was encoded into at least a current or a previous one of the encodable objects.

3. The apparatus of claim 1 wherein the control subsystem is configured to determine an operational wireless transmission power level of the write subsystem based, at least in part, on a comparison of a plurality of wireless transmission power levels of the write subsystem and a plurality of signals from the read subsystem, wherein, when the write subsystem wirelessly transmits at the operational wireless transmission power level, the write subsystem encodes information into a single one of the encodable objects proximate the first position of the media path.

4. The apparatus of claim 1 further comprising:

a media position detector coupled to the control subsystem, the media position detector configured to detect a position of the media and to send a position signal indicative of the position of the media, wherein the control subsystem uses the position signal to track positions of the encodable objects and corresponding wireless transmission power levels of the write subsystem when the write subsystem encodes the encodable objects.

5. The apparatus of claim 1 wherein the control subsystem is configured to evaluate tracking information based on a plurality of signals from the read subsystem and a plurality of wireless transmission power levels of the write subsystem, wherein the plurality of signals from the read subsystem and the plurality of wireless transmission power levels are obtained by alternatingly wirelessly transmitting information from the write subsystem at successively increasing power levels and determining whether the information wirelessly transmitted from the write subsystem has encoded at least one of the encodable objects.

6. The apparatus of claim 5 wherein the control subsystem is configured to determine an encoding window and an encoding transmission power level based on the tracking information;

wherein the write subsystem at the encoding transmission power level encodes any of the encodable objects in the encoding window without encoding any adjacent encodable object that is outside of the encoding window.

7. The apparatus of claim 6 wherein the encoding window corresponds to a region about the first position of the media path.

8. The apparatus of claim 1 wherein the media is substantially stationary relative to the write subsystem as the write subsystem wirelessly transmits the information at a plurality of transmission power levels until the information is encoded in at least one of the encodable objects.

9. The apparatus of claim 1 wherein the write subsystem includes a transmitter and an antenna.

10. The apparatus of claim 1 wherein the read subsystem includes a receiver and an antenna.

11. An apparatus for preparing a plurality of encodable objects, comprising:

a control subsystem;

a write subsystem communicatively coupled to the control subsystem, the write subsystem configured to wirelessly transmit information for encoding at least one of the encodable objects;

a read subsystem communicatively coupled to the control subsystem, the read subsystem configured to wirelessly read information encoded in one of the encodable objects, if any; and

a position detector configured to detect a position of the plurality of the encodable objects and to send a signal indicative of the position of the plurality of encodable objects;

wherein the control subsystem is configured to determine an encoding window based, in part, on a plurality of position signals from the position detector and a plurality of transmission power levels of the write subsystem at which the write subsystem transmitted information and to determine an operational transmission power level for the write subsystem such that the write subsystem at the operational signal indicative power level encodes information in one of the encodable objects in the encoding window without encoding that information in any of the encodable objects outside of the encoding window.

12. The apparatus of claim 11 wherein the control subsystem is configured to encode each of the encodable objects when each of the encodable objects is in the encoding window.

13. A method of preparing a plurality of encodable objects, the method comprising:

wirelessly transmitting information from a write subsystem at a first power level;

determining with a read subsystem whether the information wirelessly transmitted from the write subsystem is encoded in at least one of the encodable objects; and

generating a response based, at least in part, on the determining of whether the write information from the write subsystem is encoded in the at least one of the encodable objects, if any;

wherein the response comprises;

in response to determining that the information wirelessly transmitted by the write subsystem at the first power level is encoded in one of the encodable objects, moving the plurality of encodable objects relative to at least a portion of the write subsystem;

or

in response to determining that the information wirelessly transmitted by the write subsystem at the first power level is not encoded in at least one of the encodable objects, wirelessly transmitting the information from the write subsystem at a second power level, and determining whether the information wireless transmitted from the write subsystem at the second power level is encoded in at least one of encodable objects.

14. The method of claim 13 further comprising:

wirelessly transmitting information from the write subsystem until one of the encodable objects is encoded;

moving the plurality of encodable objects relative to at least a portion of the write subsystem; and

after moving the plurality of the encodable objects, repeating successively the wirelessly transmitting of information, determining whether one of the encodable objects is encoded with the most recently transmitted write information, and generating another response based on whether the most recently transmitted write information is encoded in any of the encodable objects.

15. A method of preparing a plurality of encodable objects, comprising:

alternatingly wirelessly transmitting information from a write subsystem at a first plurality of power levels and determining with a read subsystem whether the information wirelessly transmitted from the write subsystem is encoded in a respective encodable object, if any;

after determining that information from the write subsystem is encoded in the respective encodable object, moving the plurality of encodable objects relative to at least a portion of the write subsystem; and

after moving the plurality of encodable objects, wirelessly transmitting information from the write subsystem at a second plurality of power levels and determining with the read subsystem whether the information wirelessly transmitted from the write subsystem at the second plurality of power levels is encoded on the previously encoded encodable object or another encodable object.

16. The method of claim 15 wherein wirelessly transmitting information from the write subsystem at the first plurality of power levels comprises sending information at successively increasing power levels.

17. The method of claim 15 wherein the first plurality of power levels are substantially equal to the second plurality of power levels.

18. The method of claim 15 wherein the first plurality of power levels comprises a different number of power levels than the second plurality of power levels.

19. The method of claim 15 further comprising:

determining a transmission power level of the write subsystem such that write subsystem at the transmission power level successively encodes one encodable object at a time.

20. A method for preparing a plurality of spaced apart encodable objects movable along a processing path with an encoding apparatus, the encoding apparatus comprising a write subsystem and a read subsystem, the method comprising:

determining an operational wireless transmission power level for the write subsystem to wirelessly transmit information; and

determining an encoding window such that, when the write subsystem is at the operational wireless transmission power level, the write subsystem encodes information in any of the encodable objects in the encoding window without encoding that information in any of the encodable objects outside of the encoding window.

21. The method of claim 20 wherein determining the operational wireless transmission power level for the write subsystem comprises:

moving the plurality of spaced apart encodable objects along the processing path between a first position and a second position;

when one of the encodable objects is at least proximate the second position, wirelessly transmitting information from the write subsystem at a plurality of power levels and attempting to read information with the read subsystem to verify whether at least one of the encodable objects, if any, is encoded with the transmitted information.

22. The method of claim 20 wherein the encoding window is a region of the processing path.

23. The method of claim 20 wherein the determining of the encoding window includes determining a spacing of the encodable objects.

24. The method of claim 20 wherein the operational wireless transmission power level is a range of power levels at which the write subsystem successively encodes information on respective encodable objects passing through the encoding window.

25. The method of claim 20 further comprising:

wirelessly transmitting information from the write subsystem at the operation wireless transmission power level to encode information in additional encodable objects when each of the additional encodable objects is in the encoding window.

26. An apparatus for preparing a plurality of encodable objects movable along a processing path, the plurality of encodable objects capable of storing and transmitting information, the apparatus comprising:

a write subsystem configured to wirelessly transmit information;

a read subsystem configured to receive information transmitted from at least one of the encodable objects;

a position detector for determining positions of the encodable objects relative to at least a portion of the apparatus; and

a control subsystem communicatively coupled to the write subsystem, the read subsystem, and the position detector, the control subsystem configured to wirelessly transmit information from the write subsystem at a plurality of power levels and to attempt to read information with the read subsystem to determine whether the information wirelessly transmitted from the write subsystem was stored in one of the encodable objects when the encodable objects are at different positions along the processing path and to track at least some of plurality of power levels of the write subsystem and corresponding positions of the plurality of encodable objects.

27. The apparatus of claim 26 wherein the control subsystem is configured to determine a transmission range and a wireless transmission power level based, at least in part, on the tracking of some of the plurality of power levels of the write subsystem and corresponding positions of the plurality of encodable objects, wherein a transmission of information at the operational wireless transmission power level is stored on any one of the encodable objects within the transmission range without being stored on any encodable object outside of the transmission range.

28. The apparatus of claim 26 wherein the control subsystem is configured to determine relative positions of the encodable objects based at least in part on a power level of a transmission of information at which the information is stored on at least two of the encodable objects.