Electronic label interrogation through incidental electromagnetic radiation
AssigneeTagsys Australia Pty Ltd.
InventorPeter Harold Cole
Life of this patent
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Abstract
A system for electromagnetically interrogating electronically coded labels is provided. The system includes at least one electromagnetically interrogatable electronic coded label, an interrogator containing a generator of electromagnetic interrogation signals and a receiver of electromagnetic reply signals from the label. The system is adapted to make use of electromagnetic signals, other than those generated by the interrogator, which may reach the label.
Claims43
A system for electromagnetically interrogating electronically coded labels including:
- at least one electromagnetically interrogatable electronic coded label;
- and
- an interrogator containing a generator of electromagnetic interrogation signals and a receiver of electromagnetic reply signals from said label;
- wherein said system is adapted to make use of electromagnetic signals, other than those generated by said interrogator, which reach said label.
A system as claimed in any one of the preceding claims wherein said interrogation signals combine with said other signals to create a spatial interference pattern.
A system as claimed in any one of the preceding claims wherein said interrogation signals use the same frequency as said other signals which reach said label.
A system as claimed in any one of the preceding claims wherein said interrogation signals are adapted to ensure label replies are at frequencies different from said other signals which reach said receiver of said interrogator.
A system as claimed in any one of the preceding claims wherein said interrogation signals are modulated to transmit information to said label.
A system as claimed in any one of the preceding claims wherein interaction between said interrogation signals and said other signals which reach said label provides timing information within said label.
A system as claimed in any one of the preceding claims wherein said label operates with said interrogation signals alone or with said other signals reaching said label.
A system as claimed in any one of the preceding claims wherein said interrogator includes an antenna system in which some elements contribute to generation of an electromagnetic field at a position of electromagnetic compatibility testing, and a different set of elements generate an electromagnetic field in a region wherein said coded labels are located.
A system for electromagnetically interrogating electronically coded labels substantially as herein described with reference to the accompanying drawings.
A system for electromagnetically interrogating electronically coded labels including:
- at least one electromagnetically interrogatable electronic coded label;
- and
- an interrogator containing a generator of electromagnetic interrogation signals and a receiver of electromagnetic reply signals from said label;
- wherein said system is adapted to make use of electromagnetic signals, other than those generated by said interrogator, which reach said label.
Dependencies are inferred from the claim text.