Sensing with active electronic tags

  • US 5,892,441 A
  • Filed: 06/26/1996
  • Issued: 04/06/1999
  • Est. Priority Date: 06/26/1996
  • Status: Expired due to Term
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First Claim
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1. A system for monitoring and affecting actions on behalf of a group of objects, comprising:

  • a first electronic tag attached to a first mobile object in the group, comprising;

    circuitry for communicating with another tag, the circuitry communicating at least information pertaining to an object in the group, anda memory connected to the circuitry and capable of storing the information,a second electronic tag attached to a second mobile object in the group, the second mobile object being mobile relative to the first mobile object in the group, the second mobile object being configured to allow the first mobile object to remain substantially stationary relative to a reference point while the second mobile object is in motion relative to the reference point, the second electronic tag being a peer of the first electronic tag, the second electronic tag comprisingcircuitry for directly communicating the information with the first electronic tag, the circuitry being configured to sustain direct communication with the first electronic tag while the second mobile object is in motion relative to the first mobile object,a memory connected to the circuitry in the second electronic tag and capable of storing the information, anda sensor detecting the condition of an object and communicating the condition to the circuitry in the first electronic tag.

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