Monitoring system and method for protecting door with distributed and serially connected optical fiber sensors

Abstract

The invention discloses a monitoring system for a protecting door with distributed and serially connected optical fiber sensors. The system comprises data transmission optical fibers (5), optical fiber sensors, a light source (101) which is used for constantly transmitting optical signals of different frequencies, an optical circulator (102), a photoelectric detector (103) and a data processing unit (3) which is connected with the photoelectric detector (103); the optical fiber sensors are arranged on the protecting door to sense the vibration and deformation of the protecting door body and switch information, frequencies of optical signals which are received by the optical fiber sensors located at different positions of the protecting door are different, the optical fiber sensors on the protecting door are in serial connection, and the transmission optical fibers (5) are arranged between the adjacent optical fiber sensors and between the optical fiber sensors and the optical circulator (102). The system further discloses a monitoring method of the protecting door with the distributed serially connected optical fiber sensors. The system and the method have the advantages that the monitoring on vibration and deformation information of the protecting door is achieved, and safety accidents are prevented.

Description

technical field [0001] The invention belongs to the technical field of protective door monitoring, and more specifically relates to a protective door monitoring system and method in which distributed sensing optical fibers are arranged in series. Background technique [0002] A cavern is set up in the railway tunnel, and a protective door is set up in the cavern as a fire separation measure to separate the cross passage, evacuation passage and the vehicle tunnel. The protective door of the railway tunnel is set next to the track. The entire facade of the protective door has been subjected to repeated and high-intensity piston wind for a long time, and there is a risk of damage or even falling off at any time. The protective door falling to the side of the road and its serious danger may lead to operational safety accidents . Therefore, by monitoring the vibration and deformation of the protective door under the action of the piston wind, the possible hidden dangers of the p...

AI Technical Summary

Problems solved by technology

This patent mainly arranges optical fibers on the surface of the door body to judge the falling off of the protective door along with the falling off of the door body. The existing defect is that it can only be monitored after the falling off, and the falling off situation cannot be predicted in advance and processed in time, which may cause Security incidents due to processing delays

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