Research On Optical Cable Fault Monitoring System Based On Coupled Fiber Bragg Grating And GIS

With the vigorous development of optical fiber communication industry,the physical network of optical fiber communication will be more and more large,and the structure will become more and more complex,and also accompanied by the degradation of optical fiber and other problems.Under the comprehensive action of these factors,the frequency of fiber network failure increases significantly,but the current fault detection method is difficult to meet the requirements of users for the quality of service.At present,OTDR is widely used in optical fiber optic cable fault detection.It is widely used in optical fiber failure analysis as a mature optical cable fault detection technology.However,the current OTDR polling detection scheme is difficult to realize the timely response of OTDR to optical cable failure,and frequent use of OTDR will accelerate the aging of OTDR.In addition,the traditional optical cable fault detection system can not display the location of the fault on the map in the visual form.Maintenance personnel need to spend a lot of time locating the fault location,which greatly prolongs the repair time.Therefore,it is necessary to design and implement a new optical cable monitoring system which can monitor the fault of optical cable in time,prolong the service life of OTDR and locate the fault location quickly.This paper realizes a new optical fiber interruption detection system,which makes up for its shortcomings by adding GIS module and FBG module to the traditional optical cable detection system.The main work of this paper is as follows1.FBG module is introduced as the monitoring method of optical cable fault,and OTDR is used as the core unit of fault monitoring.In this system,OTDR can respond to the fiber optic cable interruption in 10 seconds,which solves the problem that OTDR can not respond to the cable failure in time.The system changed the traditional OTDR round-loop test to the fiber optic fiber interruption trigger test,which reduced the use times of OTDR and extended the service life of OTDR.2.the good performance of GIS to geographic data management is fully utilized.Combined with the relationship between the optical fiber network layout and geographical objects,the optical fiber fault monitoring system based on GIS is designed.The function of displaying the location of the optical cable fault point on the electronic map is realized in real time.After OTDR determines the fault distance of optical cable,it can complete the geographical location matching in 5 seconds and display the fault point visually.The location makes up for the shortcomings of the optical cable fault location in time.3.complete the corresponding software development of the system,and realize a highly automatic optical cable fault monitoring system by using database,Java,WebGIS and other technologies.Through the relevant procedures,the cable fault is actively reported to the optical cable maintenance personnel,and the time required for optical cable fault location is shortened from the hour level of the traditional monitoring system to the second level.