×

House arrest monitoring system

  • US 4,918,432 A
  • Filed: 08/15/1989
  • Issued: 04/17/1990
  • Est. Priority Date: 09/27/1988
  • Status: Expired due to Term
First Claim
Patent Images

1. A system for monitoring the presence or absence of an individual within a defined area, said system comprising:

  • (a) an identification tag that is attached to the individual, said identification tag including;

    a first power source,sensing means for sensing prescribed conditions associated with the operation and use of said tag, andmeans coupled to said first power source for periodically transmitting in short data bursts an identification signal including identification information that uniquely identifies said tag, and hence the individual to whom the tag is attached, and status information that indicates the prescribed conditions sensed by said sensing means;

    (b) receiving means positioned within said defined area for receiving said identification signal;

    (c) processing means coupled to said receiving means for noting the time of receipt and content of the received identification signals, from which time and content information a determination can be made as to the presence or absence of the individual within the defined area during any given time period; and

    (d) tamper means included within said processing means for sensing one of a plurality of tamper conditions associated with the use of said processing means and for generating a tamper condition signal in the event that one of said plurality of tamper conditions occurs.

View all claims
  • 7 Assignments
Timeline View
Assignment View
    ×
    ×