Apparatus and method for discrimination of fire types

Details Apparatus and method for discrimination of fire types Apparatus and method for discrimination of fire types

1995-09-29

1998-03-10

Swann, Glen

Communications: electrical

Condition responsive indicating system

Specific condition

340522, 340628, 340629, 340630, G08B 1700, G08B 1710

Patent

active

057266336

ABSTRACT:
A multiple sensor smoke detector includes at least an ionization and a photoelectric sensor. Outputs from the sensors are fed to circuitry for generating continuously variable coefficients. One coefficient corresponds to each sensor output. Respective coefficients and sensor outputs are multiplied in multiplier circuitry to produce processed outputs. The processed outputs are combined in a summing circuit to produce at least one output value indicative of a level of detected smoke. The coefficient generating circuitry, the multiplier circuitry and the combining circuitry could be implemented in a programmed microprocessor. The coefficient generating circuitry could be implemented using prestored membership functions indicative of various types of fires.

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Omron Electronics, Inc., "Fuzzy Logic A 21st Century Technology", dated Nov. 1991.

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