Fire alarm system, sensor and method
First Claim
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1. A fire alarm system comprising:
- a plurality of analog sensors for detecting a change in ambient conditions caused by a fire;
a correcting means for providing correct data from the respective analog sensors on the basis of set supervisory regions for the respective analog sensors which are defined by walls, beams or inwardly extending projections surrounding the respective analog sensors; and
a fire determining means for carrying out fire determination based on the correct data provided by said correcting means.
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Abstract
A fire alarm system, sensor and method for determining a fire by detecting a change in a temperature, smoke density and/or gas concentration due to a fire. The detection data values of the respective analog sensors are corrected based on areas of supervisory regions of the respective analog sensors which are defined by walls, beams or inwardly extending projections surrounding the respective analog sensors, and/or heights from the floor of the respective analog sensors. The fire determination is carried out based on the corrected data.
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Citations
21 Claims
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1. A fire alarm system comprising:
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a plurality of analog sensors for detecting a change in ambient conditions caused by a fire; a correcting means for providing correct data from the respective analog sensors on the basis of set supervisory regions for the respective analog sensors which are defined by walls, beams or inwardly extending projections surrounding the respective analog sensors; and a fire determining means for carrying out fire determination based on the correct data provided by said correcting means. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A fire alarm sensor comprising:
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an analog sensor section for detecting a change in ambient conditions caused by a fire; a correcting section for providing correct data from the analog sensor section on the basis of a set supervisory region for the analog sensor section which is defined by walls, beam or inwardly extending projections surrounding the analog sensor section; and a fire determining section for carrying out fire determination based on the correct data provided by said correcting section. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A fire alarm method operative in a fire alarm system or in a fire alarm sensor adapted to detect a change in ambient conditions caused by a fire, through a plurality of analog sensors, or in a single fire detector, said method comprises steps of:
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determining correct data for detection data from the respective analog sensors based on supervisory regions for the respective analog sensors which are defined by walls, beams or inwardly extending projections surrounding the respective analog sensors; and carrying out fire determination based on the correct data determined by said step of determining correct data. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification