Main cable dehumidification system based on internal humidity correction

By installing a weak grating humidity sensing fiber and humidity sensor inside the main cable of the suspension bridge, the entire area monitoring and reasonable dehumidification control of the internal humidity of the main cable is achieved, and the problem of dehumidification inaccuracy caused by large humidity gradient in the prior art is solved, and the service life of the main cable is extended.

CN223304852UActive Publication Date: 2025-09-05CCCC SECOND HARBOR ENGINEERING CO LTD
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Patent Information

Application Number
CN202422476263.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-14
Publication Date
2025-09-05
Estimated Expiration
2034-10-14

AI Technical Summary

Technical Problem

In the existing suspension bridge main cable dehumidification system, the method of controlling the dry air dehumidification system through the measurement results of the single-point electronic humidity sensor of the intake cable clamp and the outlet cable clamp is not accurate enough, and the internal humidity gradient of the large-section main cable cannot be accurately judged, resulting in unreasonable dehumidification control, which may lead to waste of energy or failure to meet the humidity standards.

Method used

Install multiple weak grating humidity sensing fibers inside the main cable, which are evenly arranged along the length of the main cable and the radial section. Combined with the humidity sensors of the air inlet and outlet ports, the internal humidity of the main cable is monitored in real time, and a fiber demodulation device is used to comprehensively determine whether dehumidification operations are required.

Benefits of technology

The full-area and full-section monitoring of the internal humidity of the main cable is realized, the rationality of dehumidification operations is ensured, the life of the main cable is extended, and the problems of energy waste and humidity failure are avoided.

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Abstract

The utility model relates to the technical field of cable monitoring, in particular to a main cable dehumidification system based on internal humidity correction. Comprising a plurality of weak grating humidity sensing optical fibers, the weak grating humidity sensing optical fibers are arranged along the full length of a main cable, a plurality of humidity grating measuring points are evenly arranged on the weak grating humidity sensing optical fibers in the length direction, and the weak grating humidity sensing optical fibers are arranged at intervals in the radial direction of the cross section of the main cable; the dehumidification device comprises a dehumidification unit, an air inlet cable clamp and an air outlet cable clamp; the dehumidification unit is communicated with the air inlet cable clamp; the air inlet cable clamp is communicated with the air outlet cable clamp through the internal space of the main cable; and the humidity acquisition device is used for acquiring the humidity of the air inlet and the humidity of the air outlet of the main cable in real time. According to the invention, the global full-section humidity monitoring information in the main cable can be intensively obtained, the humidity distribution condition in the main cable can be mastered more comprehensively, the main cable can be ensured to be below the design humidity in the whole region, and the service life of the main cable is prolonged.
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