Redundant distributed optical fiber line-type temperature sensing fire detection method and system

Abstract

The invention discloses a redundant distributed optical fiber line-type temperature sensing fire detection system. The system comprises a plurality of distributed optical fiber line-type temperature sensing fire detector host units with a redundancy function and temperature sensing optical fiber units. The invention further discloses a redundant distributed optical fiber line-type temperature sensing fire detection method. According to the invention, in redundant design schemes of important application places such as an underground comprehensive pipe gallery, an urban track traffic tunnel and a road tunnel, the redundancy function can be realized without any additional hardware investment cost and external technology means, environment temperatures on two ends of a breaking point and the propagating speed of the fire can be continuously detected when an optical fiber has the breaking point, and when one detector host fails, other detector hosts connected therewith start the redundant detection function, so that the reliability of the distributed optical fiber line-type temperature sensing fire detection system is effectively improved, the investment cost is saved, and the efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of fire monitoring and detection, in particular to a redundant distributed optical fiber line-type temperature-sensitive fire detection method and system. Background technique [0002] With the country's large investment in the construction of underground comprehensive pipe corridors, urban rail transit tunnels and highway tunnels, in order to improve the safety requirements for fire detection, distributed optical fiber line-type temperature-sensitive fire detectors are used for tunnel space and high and low voltage cables. The line temperature monitoring pre-alarm, and proposed that the system equipment needs redundant design, so the technicians studied a variety of solutions. [0003] At present, there are three main redundancy methods for the distributed optical fiber line-type temperature-sensitive fire detection system: 1. Redundancy is achieved by manual control of cold or hot standby hosts; Redunda...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a redundant distributed optical fiber line-type temperature-sensitive fire detection system and method in view of the defects and deficiencies of the prior art. problems such as low reliability, high failure rate, and backward redundancy means

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