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Method for managing facilities and workers within a closed range

  • US 5,895,445 A
  • Filed: 04/22/1997
  • Issued: 04/20/1999
  • Est. Priority Date: 04/22/1997
  • Status: Expired due to Fees
First Claim
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1. A method for controlling an underground passage comprising the steps of:

  • (a) providing a central control comprising a system controller, at least one display unit, and a telephone connection to a publicly switch telephone network (PSTN);

    (b) providing at least one remote station connected to said central control by a first data link, said at least one remote station being identified by a first address on said first data link;

    (c) providing a plurality of auxiliary devices in the underground passage, said plurality of auxiliary devices and said remote station being connected to one another by a second data link, each of said auxiliary devices being identified by a unique second address on said second data link, and being connected to a plurality of sensors and also to at least one selectively operable component, said sensors and said at least one component all being provided in the underground passage;

    (d) receiving, at a first auxiliary device, sensing data from said plurality of sensors connected to said first auxiliary device;

    (e) combining, at said first auxiliary device, said sensing data with the unique second address identifying said first auxiliary device, to thereby produce formatted sensing data;

    (f) transmitting said formatted sensing data via said second data link to said remote station;

    (g) combining, at said remote station, said formatted sensing data with the first address identifying said remote station, to thereby produce newly formatted sensing data;

    (h) transmitting said newly formatted sensing data via said first data link to said central control;

    (i) determining, at said system controller of said central control, whether or not a trouble condition exists within the passage, based on said newly formatted sensing data; and

    (j) if it is determined that a trouble condition exists, automatically sending without operator intervention, from said central control;

    (j1) emergency information to at least one predetermined agency via said PSTN;

    (j2) a warning signal to the underground passage; and

    (j3) at least one component control signal to said first auxiliary device in the underground passage via said first and second data links, to thereby control the operation of said at least one component,wherein said at least one component includes a fan connected to said first auxiliary device.

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