Multi-sensor device and methods for fire detection
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Abstract
Multiple parameter fire detection uses outputs from one or more radiant energy sensors in combination with outputs from smoke or thermal sensors to shorten response times to alarm while minimizing nuisance alarms. The radiant energy related outputs can be used to alter parameters of the smoke or thermal sensors. The various sensors can be displaced from one another in an alarm system.
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Citations
29 Claims
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1-20. -20. (canceled)
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21. A detector for sensing an environmental condition comprising:
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a light sensor which generates a first signal indicative of incident ambient light intensity;
at least a second sensor which generates a second signal indicative of a different environmental condition;
a processor that receives the first and the second signals, the processor using the first signal to alter a delay time associated with the second sensor, and the processor providing an indication of the presence of the environmental condition. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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29-52. -52. (canceled)
Specification