| Guangzhou Metro special communication system mainly includes transmission system,program control exchange system,special wireless system,closed circuit monitoring system and other communication subsystem.Among them,this paper mainly focuses on the technical reform of the system of the Guangzhou metro car circuit(hereinafter referred to as CCTV system).Closed circuit television monitoring system for video surveillance applications are mainly concentrated in the financial,public security,transportation and other special sectors and industries,but also in many areas has broad application prospects,has become one of the industry’s rapid development in recent years.And the application of the closed circuit television monitoring system in Guangzhou subway train car was started in 2006.Before 2006,the Guangzhou subway train is no video surveillance system,and the national security has not been required to install the subway train monitoring system.Along with the rising of the security situation and security needs,in 2006,all of Guangzhou subway trains were added with the vehicle closed-circuit television monitoring system,and through the car radio communication technology,the train monitoring video transmitted in real time to a central control center,the central control center(OCC)train dispatchers and drivers can achieve real-time monitoring inside,the Guangzhou metro traffic and passenger safety brought security.From 2006 to 2014,Guangzhou Metro have opened 10 lines,part of the existing train car CCTV system used for 8 years,equipment has been discontinued and high fault rate,still no corresponding technical transformation.Guangzhou metro vehicle CCTV system has high failure rate,operation is not stable,has been unable to protect the subway train operation and traffic safety requirements,in order to optimize the system equipment,must solve the existing problems and find solutions,therefore,I am in Guangzhou subway car CCTV system installation,commissioning,operation and maintenance process,and constantly study and summarize the failure problem,and its solution and emergency protection method.Which,in order to fundamentally solve the equipment failure rate high,the failure prone to video loss,the best way is to carry out technical transformation to the system to achieve.In this paper,the research is how to solve the Guangzhou subway car CCTV system in the equipment after the production of technical transformation research analysis and selection,through the comparison of different manufacturers of product quality and function test,choose the best technology transformation methods and solutions. |
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