Research On Protection Technology Of Railway Communication Optical Fiber Cable

In recent years,China railway industry has been rapidly developed.The scale of railway construction has been expanding.China railway has been achieved eight horizontal line and eight vertical line.The railway mileage has reached 124,000 kilometers.The length of the railway optical fiber cable reached 210,000 km.Railway is an important infrastructure in our country,the big arteries of the national economy and the popular means of transport.And it is the mainstay of the transportation industry.Its operational safety is extremely important for the people,society and the country.As the basic transmission carrier of railway communication network and various information networks,the role of optical cable in the railway is more and more important.It is an important part of ensuring the safe and efficient production of railway transportation,and it bears an important task of railway information transmission and service dispatch.The safety of optical fiber cable directly affect the normal operation of the railway communication system,therefore,the protection of railway communication optical fiber cable is extremely important.In this paper,the causes of railway cable failure are divided into natural factors,optical fiber cable defects and external factors.And from these three aspects,this paper analyzes the measures and key technologies of railway communication optical fiber cable protection.The following are the main work and research results of this paper:(1)For the natural factors in the cause of railway cable failure,four kinds of disasters are introduced,including lightning,strong electricity,fire and rodent disaster,which seriously affect the normal operation of railway communication optical fiber cable line.The influence and harm of these kinds of disasters on railway communication optical fiber cable system are analyzed.And this paper analyzes the mechanism of the above four kinds of disasters to destroy railway communication optical fiber cable.And the advantages and feasibility of the technology in the protection of railway cable are determined.And this paper studies the protection of each disaster measures.(2)For the optical fiber cable itself defects in the cause of railway cable failure,this paper tested the transmission performance and researched the running status quo of Chinese railway optical fiber cable.Based on the analysis of the large amount of data,this paper makes a suggestion for the cable construction and routine maintenance work.And combining with other factors,the protection measures of three kinds of laying methods are analyzed in this paper.And this paper design a feasibility program for cable line protection and maintenance.(3)For the external factors in the cause of railway cable failure,this paper summarizes all kinds of faults of railway communication fiber optic cable and the existing railway communication fiber optic cable protection technology,including infrared detection technology,pulse electron detection technology,tension detection technology and intelligent video analysis.This paper studies the optical fiber recognition technology based on Sagnac interference.And this paper analyzes the basic principle of its identification and protection.This paper designs and implements a new type of fiber optic cable recognizer based on Android terminal display,and apply it to railway optical fiber cable protection And through comparing with other cable protection technology,this paper designs the comprehensive protection strategy of railway optical fiber cable.