Optical fiber passive conveyor integrated protection system and control method thereof

The fiber optic passive conveyor integrated protection system utilizes fiber optic loops and splitter reflection coding to achieve rapid shutdown and precise positioning of the conveyor, solving the problems of complex structure, high cost and insufficient positioning accuracy in existing technologies, and achieving a simple and reliable protection effect.

CN122426531APending Publication Date: 2026-07-21SHENYANG CHINA COAL ENG TECH CO LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHENYANG CHINA COAL ENG TECH CO LTD
Filing Date
2026-06-23
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing belt conveyor protection systems are complex in structure, costly, require fiber optic demodulators, and have insufficient fault location accuracy.

Method used

The fiber optic passive transmission machine integrated protection system is adopted. The first fiber optic loop realizes rapid shutdown protection, and the second fiber optic loop and splitter reflection coding realize precise positioning. By utilizing the synchronous operation of the first and second optical switches, power supply and electromagnetic interference along the line are avoided, reducing system complexity and cost.

Benefits of technology

It enables rapid shutdown and precise positioning of the conveyor, avoiding the electrical spark safety hazards of traditional electrical signal protection systems and the high cost of fiber optic grating protection systems. The system has a simple structure and high reliability.

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Abstract

The application provides an optical fiber passive conveyor integrated protection system and a control method thereof, and belongs to the technical field of conveyor protection systems. The application solves the problems of complex structure, high cost, the need for a fiber grating demodulator and insufficient fault positioning accuracy of existing protection systems. The application comprises a host unit, a plurality of optical switch units, a first optical fiber loop and a second optical fiber loop. The host unit comprises a light source module, a shutdown control module, a positioning addressing module and a data analysis module. The optical switch units are arranged along the conveyor line at intervals. Each optical switch unit comprises a first optical switch and a second optical switch for responding to the fault protection action of the conveyor. The first optical fiber loop is connected with the light source module and the shutdown control module. The second optical fiber loop is connected with the light source module and the positioning addressing module. The second optical switch in the plurality of optical switch units is arranged in the second optical fiber loop. The second optical fiber loop further comprises a beam splitter. The positioning addressing module is used for sending an addressing light signal to the second optical fiber loop to perform positioning addressing.
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