Fire early-warning method and system

Abstract

The invention discloses a fire early-warning method and a fire early-warning system. The fire early-warning system comprises N groups of cable type temperature-sensing detectors (1), N groups of microcomputer modulators (2) and a fire early-warning center (3), wherein the N groups of microcomputer modulators (2) are connected in a same loop in series; the N groups of cable type temperature-sensing detectors (1) are used for acquiring and representing N groups of impedance signals of ambient temperature conditions in corresponding N fire monitoring areas respectively; the N groups of microcomputer modulators (2) are used for receiving the N groups of impedance signals, determining a fire monitoring area with abnormal ambient temperature among the N fire monitoring areas according to the N groups of impedance signals, generating a fire alarm signal containing positional information of a fire alarm source, and sending the fire alarm signal to the fire early-warning center (3); and the fire early-warning center (3) is used for receiving the fire alarm signal, determining position of the fire monitoring area with abnormal ambient temperature according to the fire alarm signal, and starting spray equipment (4) in the fire monitoring area with abnormal ambient temperature.

Description

technical field [0001] The present invention relates to the technical field of fire early warning, and more specifically, to a fire early warning method and system. Background technique [0002] In the prior art, the structural design of the nuclear power plant fire early warning system is as follows: each fire monitoring area of ​​the nuclear power plant is equipped with a cable-type temperature-sensitive detector, and each cable-type temperature-sensitive detector in each fire monitoring area is connected to the same A fire controller constitutes N independent detection circuits. That is to say, the existing nuclear power plant fire warning system adopts a point-to-point fire warning mechanism. The fire warning system has the following defects: 1) If any detection circuit of the fire warning system breaks down, the fire warning system will not be able to realize the fire warning in the fire monitoring area that constitutes the detection circuit, and the reliability of the...

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Problems solved by technology

The fire warning system has the following defects: 1) If any detection circuit of the fire warning system breaks down, the fire warning system will not be able to realize the fire warning in the fire monitoring area that constitutes the detection circuit, and the reliability of the system is extremely poor; 2. ) The design of the fire warning system with only one cable-type heat detector in each fire monitoring area will inevitably lead to a high false alarm rate; 3) The system only includes one fire controller, and the fire alarm The processing efficiency is low, and the fire alarm emergency mechanism is not flexible enough. What's worse, if the fire controller fails, the entire fire early warning system will be in a paralyzed state, and the stability of the system is poor.

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