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Secure field monitoring device for use in electronic house arrest monitoring system

  • US 5,146,207 A
  • Filed: 07/01/1991
  • Issued: 09/08/1992
  • Est. Priority Date: 07/01/1991
  • Status: Expired due to Fees
First Claim
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1. Monitoring apparatus usable with an electronic house arrest monitoring (EHAM) system for monitoring the presence or absence of a specified individual at an assigned location remote from a central monitoring location, said monitoring apparatus comprising:

  • a closed housing;

    detection means within said housing for detecting the presence or absence of the specified individual at the assigned location;

    control means within said housing for controlling the operation of said monitoring apparatus in accordance with a set of preprogrammed operating parameters;

    electrically erasable programmable read only memory (EEPROM) means within said housing for storing said operating parameters;

    random access memory means within said housing for storing data processed by said processing means;

    first port means for allowing data access into and out of said RAM means through said control means from a location external to said housing, whereby data may be selectively transferred between said random access memory means and an external device;

    second port means coupled to said control means for selectively allowing data to be programmed into said EEPROM means from an external programming device, and for selectively allowing data stored in said EEPROM means to be read by said external programming device, said second port means being concealed on said housing; and

    access means for allowing access to said EEPROM means through said second port means only when a plurality of prescribed conditions have been met;

    whereby said operating parameters for said control means can be accessed only by personnel having knowledge of the location of said second port means and said plurality of prescribed conditions.

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