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Tamper detection for body worn transmitter

  • US 5,959,533 A
  • Filed: 05/27/1997
  • Issued: 09/28/1999
  • Est. Priority Date: 05/27/1997
  • Status: Expired due to Term
First Claim
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1. A tamper detection system for a body worn transmitter attached to a subject'"'"'s body comprising:

  • a portable monitoring receiver in proximity to the body worn transmitter continuously receiving signals from the body worn transmitter and a global positioning satellite;

    the body worn transmitter having an antenna imbedded in a strap for communicating with the portable monitoring receiver, the antenna inductively coupled to the body of the subject and means for electrically coupling the antenna to the transmitter;

    the body worn transmitter having programmed therein a coded identification signal, a data encryption for the coded identification signal, a real time clock and means to detect tampering with the body worn transmitter; and

    the body worn transmitter additionally containing an electrolyte immersion sensor sending a tamper inhibit signal via the antenna to the portable monitoring receiver and then to a base station.

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