Patent ID: 6873256

Claim:
A system for intelligently monitoring, detecting, and evaluating hazardous situations comprising: a. a portable sensor unit, said portable sensor unit for receiving inputs and transmitting outputs; b. a radio signal positioning system inputting data to said portable sensor unit whereby location information of said portable sensor unit, based on radio signal positioning information received by said portable sensor unit from said radio signal positioning system, is stored in said portable sensor unit; and c. a base station information processor in communication with said portable sensor unit, said base station information processor for processing information received from said portable sensor unit transmission output, said information received by said base station information processor from said portable sensor unit including radio signal positioning information stored in said portable sensor unit; d. said base station having an expert system, said expert system processing information related to output received from said portable sensor unit, wherein the expert system comprises a computer having a memory containing a plurality of fuzzy inference rules, each rule defining a danger index depending on the combined states of a plurality of variables defining structure status contained in the outputs received from said portable sensor unit, and wherein the computer is structured: (i) to use received signals defining the sensed variables to select and reproduce from the memory applicable ones of the plurality of rules and to apply the selected rules, using fuzzy logic, to derive an index of danger at various different locations in the structure; and (ii) to compare the danger indices at each of said locations to derive a preferred one of several alternate routes, each route connecting at least one point inside the structure and a point outside the structure.