Analog fire sensor
First Claim
1. A fire detection system for detecting a fire condition in any of a plurality of supervised regions, comprising:
- a plurality of sensors respectively located in such regions and which produce analog data corresponding to a physical state relevant to a fire condition, each such sensor transmitting the analog data produced thereby in response to a polling signal received thereby only if such data exceeds a predetermined threshold level; and
a central signal station adapted to poll said sensors sequentially and to receive the analog data transmitted thereby, and which makes a predictive calculation of the time remaining until outbreak of a fire on the basis of the analog data so received.
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Accused Products
Abstract
An analog fire detecting system in which a plurality of sensors produce analog data corresponding to a physical state such as temperature, smoke density, etc. relevant to a fire condition. The values of such analog data are compared with a predetermined threshold level, and if the threshold level is exceeded the analog data is transmitted to a central station in response to a polling signal therefrom. A CPU in the central station determines, from the analog data from the sensors, if there is a possibility of a fire and if so makes a predictive calculation of the remaining time until a fire condition will be reached. An alarm is given when such predicted time falls below a preset interval.
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Citations
8 Claims
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1. A fire detection system for detecting a fire condition in any of a plurality of supervised regions, comprising:
a plurality of sensors respectively located in such regions and which produce analog data corresponding to a physical state relevant to a fire condition, each such sensor transmitting the analog data produced thereby in response to a polling signal received thereby only if such data exceeds a predetermined threshold level; and
a central signal station adapted to poll said sensors sequentially and to receive the analog data transmitted thereby, and which makes a predictive calculation of the time remaining until outbreak of a fire on the basis of the analog data so received.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
Specification