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US5793305A
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Assignee: Tagsys Australia Pty Ltd
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Filing: 1995-09-29
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Granted: 1998-08-11
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Expires: 2015-09-29
Abstract
Abstract An identification system having an electronic label for processing articles such as baggage or carrier cargo. The system uses the principle of electromagnetic communication in which an interrogator containing a transmitter generates an electromagnetic field through which the electronic label containing a label receiving antenna may pass. The electronic label is attached to the article being processed and includes means for sensing the electromagnetic field and means for generating intermittently repeated label reply signals. The system includes a receiver for detecting and decoding the label reply signal. The electronic label replies intermittently as long as it is within the electromagnetic field, and the field is maintained for a period of time which is greater than the time interval between the intermittently repeated label replies. The electronic label also includes means for determining the interval between the intermittently repeated label reply signals without reference to timing signals external to the label. The interval between label reply signals varies from label to label and is greater than the time required for a label reply.
Inventors
- 👤 Leigh Holbrook Turner
- 👤 Peter Harold Cole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:05
CPC Classifications
G; G06; G06K; G06K19/00; G06K19/06; G06K19/067; G06K19/07; G06K19/077; G06K19/07749; G06K19/07758; B; B07; B07C; B07C3/00; B07C3/18; G06K19/0723; G06K19/07773; G06K19/07777; G06K19/07779; G06K19/07783; G06K19/07786; G06K7/00; G06K7/0008; G06K7/10; G06K7/10009; G06K7/10316; G06K7/10336; G06K7/10346; G06K7/10366; G06K7/10415; G06K7/10425; G06K7/10435; G07; G07B; G07B15/00; G08; G08B; G08B13/00; G08B13/22; G08B13/24; G08B13/2402; G08B13/2405; G08B13/2414; G08B13/2417; G08B13/2428; G08B13/2431; G08B13/2434; G08B13/2437; G08B13/2448; G08B13/2451; G08B13/2462; G08B13/2465; G08B13/2468; G08B13/2471; G08B13/2474; G08B13/2485; H; H01; H01Q; H01Q7/00; H01Q9/00; H01Q9/04; H01Q9/16; H01Q9/28; H01Q9/285
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
150 words
An identification and telemetry system comprising an interrogator including a transmitter for generating an interrogation signal at an interrogation signal frequency and a receiver for detecting and decoding a reply signal; an interrogation field creation and confinement means including a transmitter antenna connected to the said transmitter for generating from said interrogation signal an interrogation electromagnetic field through which an object possessing a code responding label may pass; said code responding label including a label receiving antenna for receiving from the interrogation field a label interrogation signal, means for generating a label reply signal, and means for generating from said label reply signal a reply electromagnetic field; a receiver antenna connected to said receiver for receiving from said label reply electromagnetic field a reply signal; wherein object entry and exit regions of said field creation and confinement means form at the interrogation signal frequency waveguides operating below their cut-off frequency.
Claim 2
Dependent Claim
150 words
An identification and telemetry system comprising an interrogator including a transmitter for generating an interrogation signal at an interrogation signal frequency and a receiver for detecting and decoding a reply signal; an interrogation field creation and confinement means including a transmitter antenna connected to the said transmitter for generating from said interrogation signal an interrogation electromagnetic field through which an object possessing a code responding label may pass; said code responding label including a label receiving antenna for receiving from the interrogation field a label interrogation signal, means for generating a label reply signal, and means for generating from said label reply signal a reply electromagnetic field; a receiver antenna connected to said receiver for receiving from said label reply electromagnetic field a reply signal; wherein object entry and exit regions of said field creation and confinement means form at the interrogation signal frequency waveguides operating below their cut-off frequency.
Claim 3
Dependent Claim
195 words
An identification and telemetry system comprising an interrogator including a transmitter for generating an interrogation signal at an interrogation signal frequency and a receiver for detecting and decoding a reply signal; an interrogation field creation and confinement means including a transmitter antenna connected to said transmitter for generating from said interrogation signal an interrogation electromagnetic field through which an object possessing a code responding label may pass; said code responding label including a label receiving antenna for receiving from said interrogation field a label interrogation signal, a rectifier containing a diode and a reservoir capacitor for converting to do part of the energy supplied as ac via the label interrogation signal, means for generating a label reply signal, and means for generating from said label reply signal a reply electromagnetic field; a receiver antenna connected to said receiver for receiving from said label reply field a reply signal; wherein the interrogation signal frequency allows simultaneous use of a monolithically integrated rectifier diode, a monolithically integrated reservoir capacitor and said interrogation field creation and confinement means is such that object entry and exit regions form at the interrogation signal frequency waveguides operating below their cut-off frequency.
Claim 4
Dependent Claim
195 words
An identification and telemetry system comprising an interrogator including a transmitter for generating an interrogation signal at an interrogation signal frequency and a receiver for detecting and decoding a reply signal; an interrogation field creation and confinement means including a transmitter antenna connected to said transmitter for generating from said interrogation signal an interrogation electromagnetic field through which an object possessing a code responding label may pass; said code responding label including a label receiving antenna for receiving from said interrogation field a label interrogation signal, a rectifier containing a diode and a reservoir capacitor for converting to do part of the energy supplied as ac via the label interrogation signal, means for generating a label reply signal, and means for generating from said label reply signal a reply electromagnetic field; a receiver antenna connected to said receiver for receiving from said label reply field a reply signal; wherein the interrogation signal frequency allows simultaneous use of a monolithically integrated rectifier diode, a monolithically integrated reservoir capacitor and said interrogation field creation and confinement means is such that object entry and exit regions form at the interrogation signal frequency waveguides operating below their cut-off frequency.
Claim 5
Dependent Claim
38 words
An identification and telemetry system as claimed in claim 1 wherein said interrogation field creation and confinement means includes a magnetically permeable material in a metallically confined return flux path for the magnetic component of said interrogation field.
Claim 6
Dependent Claim
34 words
An identification and telemetry system as claimed in claim 1 wherein choke structures which inhibit flow of wall currents are placed in object entry and exit regions of said field creation and confinement means.
Claim 7
Dependent Claim
193 words
An identification and telemetry system comprising: an interrogator containing a transmitter for generation of an interrogation signal at an interrogation signal frequency and a receiver for detection and decoding of a reply signal; an interrogation region into and out of which objects possessing code responding labels may pass; an interrogation field creation and confinement means including a transmitter antenna connected to the said transmitter and generating from the said interrogation signal an interrogation electromagnetic field in the said interrogation region; said code responding labels including a label receiving antenna for receiving from the interrogation electromagnetic field a label interrogation signal, means for generating a label reply signal, and means for generating from that label reply signal a reply electromagnetic field; and a receiver antenna connected to the said receiver and receiving from the label reply electromagnetic field a reply signal; said interrogation field creation and confinement means including at least one metallic conduct surrounding said interrogation region and forming an aperture through which the objects gain entry to or exit from the said interrogation region, said aperture being of dimensions less than half of the electromagnetic wave length at the said interrogation frequency.
Claim 8
Dependent Claim
193 words
An identification and telemetry system comprising: an interrogator containing a transmitter for generation of an interrogation signal at an interrogation signal frequency and a receiver for detection and decoding of a reply signal; an interrogation region into and out of which objects possessing code responding labels may pass; an interrogation field creation and confinement means including a transmitter antenna connected to the said transmitter and generating from the said interrogation signal an interrogation electromagnetic field in the said interrogation region; said code responding labels including a label receiving antenna for receiving from the interrogation electromagnetic field a label interrogation signal, means for generating a label reply signal, and means for generating from that label reply signal a reply electromagnetic field; and a receiver antenna connected to the said receiver and receiving from the label reply electromagnetic field a reply signal; said interrogation field creation and confinement means including at least one metallic conduct surrounding said interrogation region and forming an aperture through which the objects gain entry to or exit from the said interrogation region, said aperture being of dimensions less than half of the electromagnetic wave length at the said interrogation frequency.
Claim 9
Dependent Claim
165 words
An identification and telemetry system comprising: an interrogator containing a transmitter for generation of an interrogation signal at an interrogation signal frequency and a receiver for detection and decoding of a reply signal; an interrogation region into and out of which objects possessing code responding labels may pass; an interrogation field creation and confinement means including a transmitter antenna connected to the said transmitter and generating from the said interrogation signal an interrogation electromagnetic field in the said interrogation region; said code responding labels including a label receiving antenna for receiving from the interrogation electromagnetic field a label interrogation signal, means for generating a label reply signal, and means for generating from that label reply signal a reply electromagnetic field; and a receiver antenna connected to the said receiver and receiving from the label reply electromagnetic field a reply signal; said field creation and confinement means including a metallic walled tube of cross sectional dimensions less than half a wave length at the interrogation frequency.
Claim 10
Dependent Claim
165 words
An identification and telemetry system comprising: an interrogator containing a transmitter for generation of an interrogation signal at an interrogation signal frequency and a receiver for detection and decoding of a reply signal; an interrogation region into and out of which objects possessing code responding labels may pass; an interrogation field creation and confinement means including a transmitter antenna connected to the said transmitter and generating from the said interrogation signal an interrogation electromagnetic field in the said interrogation region; said code responding labels including a label receiving antenna for receiving from the interrogation electromagnetic field a label interrogation signal, means for generating a label reply signal, and means for generating from that label reply signal a reply electromagnetic field; and a receiver antenna connected to the said receiver and receiving from the label reply electromagnetic field a reply signal; said field creation and confinement means including a metallic walled tube of cross sectional dimensions less than half a wave length at the interrogation frequency.
Claim 11
Dependent Claim
35 words
An identification and telemetry system as in claim 6 wherein the object entry and exit portions of the interrogation field and confinement means form, at the interrogation signal frequency, waveguides operating below their cut-off frequency.
Claim 12
Dependent Claim
35 words
An identification and telemetry system as in claim 7 further choke means, disposed in the object entry and exit sections of the said field creation and confinement means, for inhibiting the flow of wall currents.
Claim 13
Dependent Claim
37 words
An identification and telemetry system as in claim 5 wherein the said field creation means includes rods or bars of magnetically permeable material placed within a metallic chamber or against the interior walls of a metallic tube.
Claim 14
Dependent Claim
38 words
An identification and telemetry system as in claim 5 in which the interrogation field and confinement means includes a magnetically permeable material in a metallically confined return flux path for the magnetic component of the interrogation electromagnetic field.
Claim 15
Dependent Claim
185 words
An identification and telemetry system comprising: an interrogator containing a transmitter for generation of an interrogation signal at an interrogation signal frequency and a receiver for detection and decoding of a reply signal; an interrogation region into and out of which objects possessing code responding labels may pass; an interrogation field creation and confinement means including a transmitter antenna connected to the said transmitter and generating from the said interrogation signal an interrogation electromagnetic field in the said interrogation region; said code responding labels including a label receiving antenna for receiving from the interrogation electromagnetic field a label interrogation signal, means for generating a label reply signal, and means for generating from that label reply signal a reply electromagnetic field; and a receiver antenna connected to the said receiver and receiving from the label reply electromagnetic field a reply signal; said interrogation signal frequency allowing the simultaneous use of a monolithically integrated rectifier diode, a monolithically integrated reservoir capacitor and a field creation and confinement means containing a metallic walled tube of cross sectional dimensions less than half a wave length at the interrogation frequency.
Claim 16
Dependent Claim
185 words
An identification and telemetry system comprising: an interrogator containing a transmitter for generation of an interrogation signal at an interrogation signal frequency and a receiver for detection and decoding of a reply signal; an interrogation region into and out of which objects possessing code responding labels may pass; an interrogation field creation and confinement means including a transmitter antenna connected to the said transmitter and generating from the said interrogation signal an interrogation electromagnetic field in the said interrogation region; said code responding labels including a label receiving antenna for receiving from the interrogation electromagnetic field a label interrogation signal, means for generating a label reply signal, and means for generating from that label reply signal a reply electromagnetic field; and a receiver antenna connected to the said receiver and receiving from the label reply electromagnetic field a reply signal; said interrogation signal frequency allowing the simultaneous use of a monolithically integrated rectifier diode, a monolithically integrated reservoir capacitor and a field creation and confinement means containing a metallic walled tube of cross sectional dimensions less than half a wave length at the interrogation frequency.
Claim 17
Dependent Claim
35 words
An identification and telemetry system as in claim 11 wherein the object entry and exit portions of the interrogation field and confinement means form at the interrogation signal frequency waveguides operating below their cut-off frequency.
Claim 18
Dependent Claim
95 words
An identification and telemetry system as in claim 12, wherein the system contains a stray field cancellation means connected to the interrogator, receiving from the interrogator a signal at the interrogation frequency and creating, in the region external to the interrogation field and confinement means, a cancellation electromagnetic field so as to cancel in that region the stray electromagnetic field which emerges from the said field creation and confinement means, the signals delivered to the stray field cancellation means being adaptively adjusted to minimize the stray electromagnetic field emerging from the said field creation means.
Claim 19
Dependent Claim
59 words
An identification and telemetry system as in claim 5, wherein the interrogation field and confinement means contains a plurality of transmitter antennas and the signals in the said transmitter antennas are adjusted in amplitude and phase so as to reduce stray electromagnetic fields generated in the region external to that in which interrogation of labels is intended to occur.
Claim 20
Dependent Claim
34 words
An identification and telemetry system as in claim 5 in which the interrogation field is provided by a plurality of transmitter antennas creating overlapping and interfering fields within the field creation and confinement means.
Claim 21
Dependent Claim
27 words
An identification and telemetry system as in claim 5 wherein the said conductor contains a gap providing a pair of terminals for connection to the said transmitter.
Claim 22
Dependent Claim
212 words
An identification and telemetry system comprising: an interrogator containing a transmitter for generation of an interrogation signal at an interrogation signal frequency and a receiver for detection and decoding of a reply signal; an interrogation region into and out of which objects possessing code responding labels may pass; an interrogation field creation and confinement means including a transmitter antenna connected to the said transmitter and generating from the said interrogation signal an interrogation electromagnetic field in the said interrogation region; said code responding labels including a label receiving antenna for receiving from the interrogation electromagnetic field a label interrogation signal, means for generating a label reply signal, and means for generating from that label reply signal a reply electromagnetic field; a receiver antenna connected to the said receiver and receiving from the label reply electromagnetic field a reply signal; and said interrogation field creation and confinement means contains at least one metallic conductor surrounding said interrogation region, and forming an aperture through which the objects gain entry to or exit from the said interrogation region, said aperture being of dimensions less than half of the electromagnetic wave length at the said interrogation frequency, and the said conductor including a plurality of gaps across which are connected a plurality of series resonating capacitors.
Claim 23
Dependent Claim
212 words
An identification and telemetry system comprising: an interrogator containing a transmitter for generation of an interrogation signal at an interrogation signal frequency and a receiver for detection and decoding of a reply signal; an interrogation region into and out of which objects possessing code responding labels may pass; an interrogation field creation and confinement means including a transmitter antenna connected to the said transmitter and generating from the said interrogation signal an interrogation electromagnetic field in the said interrogation region; said code responding labels including a label receiving antenna for receiving from the interrogation electromagnetic field a label interrogation signal, means for generating a label reply signal, and means for generating from that label reply signal a reply electromagnetic field; a receiver antenna connected to the said receiver and receiving from the label reply electromagnetic field a reply signal; and said interrogation field creation and confinement means contains at least one metallic conductor surrounding said interrogation region, and forming an aperture through which the objects gain entry to or exit from the said interrogation region, said aperture being of dimensions less than half of the electromagnetic wave length at the said interrogation frequency, and the said conductor including a plurality of gaps across which are connected a plurality of series resonating capacitors.
Claim 24
Dependent Claim
37 words
An identification and telemetry system as in claim 5 in which the interrogation field is provided by a pair of loop antennas configured on a common axis and carrying oppositely phased currents at the interrogation signal frequency.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-08-10 | 2002-02-09 | 2002-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-08-10 | 2006-02-09 | 2006-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-08-10 | 2010-02-09 | 2010-08-11 | $7700.00 | Window Closed / Lapsed |