Detector with ambient photon sensor and other sensors
First Claim
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1. A detector for monitoring an environment for a fire comprising:
- at least one light sensor that senses light originating from a fire source within the environment and forms at least one output signal indicative thereof;
at least a second sensor that senses a different environmental parameter, selected from a class that includes gas, smoke, temperature, humidity, velocity, and other predetermined environmental parameters, and forms at least a second output signal indicative thereof;
a controller that receives the signals and determines the existence, in response thereto, of a fire and wherein the controller includes circuitry to test the light sensor.
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Abstract
A sensor of incident ambient photons is combined, in a detector with one or more sensors responsive to other types of ambient parameters such as gas, humidity, temperature or the like. Outputs from the sensors are processed to establish the existence of one of a hazardous condition, a non-hazardous condition and a false alarm.
88 Citations
20 Claims
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1. A detector for monitoring an environment for a fire comprising:
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at least one light sensor that senses light originating from a fire source within the environment and forms at least one output signal indicative thereof; at least a second sensor that senses a different environmental parameter, selected from a class that includes gas, smoke, temperature, humidity, velocity, and other predetermined environmental parameters, and forms at least a second output signal indicative thereof; a controller that receives the signals and determines the existence, in response thereto, of a fire and wherein the controller includes circuitry to test the light sensor. - View Dependent Claims (2, 3, 4)
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5. An apparatus for monitoring an environment comprising:
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a housing; at least one sensing element responsive to incident radiant energy indicative of an external environmental condition, the sensing element forming at least one output signal indicative thereof; where the at least one sensing element is mounted at one of in or on the housing such that radiant energy originating within the environment external to the housing is incident thereon; at least a second sensor, carried by the housing that senses a different environmental parameter and forms at least a second output signal indicative thereof; and a controller that receives the signals and in response at least to a selected signal from the one sensing element, produced by a calibrated input, the controller evaluates performance of the one sensing element. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification