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Method, apparatus and article for detection of transponder tagged objects, for example during surgery

  • US 9,814,540 B2
  • Filed: 11/10/2016
  • Issued: 11/14/2017
  • Est. Priority Date: 03/31/2014
  • Status: Active Grant
First Claim
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1. A transponder detection device, comprising:

  • an antenna;

    a processor operatively coupled to the antenna; and

    a nontransitory processor-readable medium communicatively coupled to the processor and that stores at least one of instructions or data executable by the processor, which cause the processor to;

    execute a number of successive interrogation cycles, the number of successive interrogation cycles greater than one, wherein, during each of the number of successive interrogation cycles the transponder detection device,emits a periodic electromagnetic interrogation signal during a transmit portion of the interrogation cycle;

    receives electromagnetic signals during a receive response portion of the interrogation cycle that follows the transmit portion of the interrogation cycle; and

    waits a respective delay period before a respective start of each of the successive interrogation cycles of the number of interrogation cycles, each respective delay period for the number of interrogation cycles equal to a respective fraction of a nominal tag response signal period, and, for each one of the successive interrogation cycles of the number of interrogation cycles, the respective delay period is different than at least one other respective delay period of an interrogation cycle of the number of successive interrogation cycles by a duration equal to the nominal tag response signal period divided by the number of successive interrogation cycles.

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