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Data line monitoring system

  • US 5,208,742 A
  • Filed: 04/30/1990
  • Issued: 05/04/1993
  • Est. Priority Date: 04/30/1990
  • Status: Expired due to Term
First Claim
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1. A data signal monitoring system having microprocessor for monitoring data signals in a data wire without interrupting data signal flow, where said microprocessor then controls other devices from information extracted from said data wire, comprising:

  • (a) a configuration circuit, attached to said data wire to be monitored, having opto-coupler means for coupling and isolating said data wire from said data signal monitoring system allowing data signals to be monitored without interruption, where said opto-coupler generates computer logic signals corresponding to said data signals;

    (b) a microprocessor including plural input-output ports, programmable read and write only memory, programmable read and write variable memory, said microprocessor having bus means connecting said configuration circuit with at least one of said microprocessor ports for receiving said computer logic signals from said configuration circuit;

    (c) a programmable switch selector having bus connection to at least one of said microprocessor ports for instructing said microprocessor as to which of said computer logic signals to select and process, and which of said computer logic signals to discard, where said microprocessor generates output signals corresponding to said selected and processed signals; and

    (d) a converter means having bus connection to at least one of said input-out ports, for transforming said output signals to signals readable by an electrical device to be controlled, whereby said microprocessor controls said device from information extracted from said data wire.

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