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Active radio tag, security management system, and security management method

  • US 7,889,060 B2
  • Filed: 05/17/2007
  • Issued: 02/15/2011
  • Est. Priority Date: 05/18/2006
  • Status: Expired due to Fees
First Claim
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1. An active radio tag comprising:

  • a storage unit having stored therein a tag ID;

    a transmission unit that transmits, by radio, the tag ID in a predetermined signal form;

    a card holder having the storage unit and the transmission unit built therein and including a card placement section in which a card is to be placed; and

    a detection unit that detects a card placed in the card holder, wherein when the detection unit detects a card, transmission of the tag ID is allowed and when the detection unit does not detect a card, transmission of the tag ID is prohibited,wherein the card holder includes an operation section, the transmission unit transmits the tag ID in different signal forms for different cases, a case in which the operation section is operated and a case in which the operation section is not operated, when the operation section is operated, if the detection unit detects a card, then transmission of the tag ID in a first signal form is allowed, and if the detection unit does not detect a card, then transmission of the tag ID in the first signal form is prohibited, and when the operation section is not operated, regardless of whether there is a card, transmission of the tag ID in a second signal form is allowed.

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