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Information management system, method, program and recording medium

  • US 20070222591A1
  • Filed: 03/26/2007
  • Published: 09/27/2007
  • Est. Priority Date: 03/27/2006
  • Status: Active Grant
First Claim
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1. An information management system comprisingone or a plurality of radio frequency (RF) tags and a reader-writer, the RF tags and the reader-writer communicating with each other, whereineach RF tag comprises:

  • a sensor that detects a change in an environment around the RF tag;

    a storage section that stores identifier information identifying the RF tag, the information being uniquely assigned to the RF tag; and

    a first control section that controls the sensor and the storage section andthe reader-writer comprises a sensor value requesting section that requests, with respect to the identifier information, a sensor value detected by the sensor,the reader-writer determining, when environmental information changes, an object according to the sensor value sent from an RF tag including the identifier information to the reader-writer.

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