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Environmental detection system useful for fire detection and suppression

  • US 5,105,370 A
  • Filed: 08/17/1990
  • Issued: 04/14/1992
  • Est. Priority Date: 04/14/1988
  • Status: Expired due to Term
First Claim
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1. A method of detecting an environmental condition such as fire, smoke and intrusion in a monitored space and for providing an historical analysis of abnormal events concerning the monitoring of the space, said method comprising the steps of:

  • using a plurality of detectors in the monitored space, each detector having means for sensing an environmental condition parameter in the monitored space and for producing a plurality of different types of detector signals including signals representative of said parameter and signals representative of the operational status of the detector;

    receiving and processing said detector signals in a signal processing device operably coupled with said detectors for determining the environmental status of the monitored space and the operational status of said detectors therefrom;

    determining the occurrence of abnormal events including at least one of a predetermined environmental condition in the monitored space and a defect in the operational status of said apparatus unrelated to the environmental status of the monitored space;

    providing time data indicative of the occurrence of said abnormal events;

    storing history data including data representative of said events and respectively corresponding time data; and

    providing an output of said history data in a manner illustrative of said abnormal events and the real time of occurrence thereof for allowing time-based, historical analysis of said abnormal events.

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