Design And Implementation Of Automatic Monitoring And Control System For Broadcast Television Transmitter

The continuous development of radio and television technology has placed increasing demands on the monitoring and control of broadcast television transmitters.The construction of the automatic monitoring and control system for broadcast television transmitters is a key link to ensure the normal broadcast of broadcast television programs and to achieve "someone stays behind and is unattended".By strengthening automated monitoring,it can help the broadcasting and television authorities to obtain real-time status of each device and conduct data analysis to ensure maximum uninterrupted broadcast of live broadcast television.Firstly,based on the research and analysis of the development of domestic and international radio and television monitoring technology,this thesis designs and implements an automatic monitoring and control system for broadcast TV transmitters based on decentralized control and centralized management architecture.The system centrally manages information through the core server,and simultaneously monitors and controls multiple single-chip subsystems.The distributed architecture adopted by the single-chip subsystem can avoid the failure of individual terminal subsystems and affect the performance of the entire monitoring system.Since the microcontroller receives the control word parameters only during system initialization,the terminal subsystem can operate independently in the event of a server failure.thereby ensuring that the broadcast television transmitter can be properly monitored.Secondly,in view of the importance of the single chip microcomputer subsystem,the focus of this thesis is on the software and hardware design and implementation of the single chip microcomputer subsystem.The STC12C5A60S2 microcontroller is used in the subsystem to handle the communication between the terminal and the server,the main transmitter and the standby transmitter.In order to ensure the robustness of the transmitted data,the serial port uses RS232 or RS422 to transmit data and adapts to different broadcast television transmitter communication interfaces.The 16C550 is used to expand the third serial port,which solves the problem of insufficient serial port resources,and provides ideas for extending the multi-channel serial port and improves system compatibility.The single-chip subsystem software adopts the modular design idea and is divided into four parts for design.They are the main control module,the main transmitter module,the standby transmitter module and the watchdog module.The main control module is responsible for communication between the SCM subsystem and the server,and controls the main transmitter module and the standby transmitter module.The main(standby)transmitter module realizes communication between the main control module and the main(standby)transmitter,and controls the main(standby)transmitter according to the instruction of the main control module.The watchdog module uses X5045 to monitor whether the main control module is running normally,which further improves the robustness of the system.Due to the modular design,when applied to different types of broadcast television transmitters,it is only necessary to modify the corresponding transmitter module without rewriting the main control module and the watchdog module.Therefore,the reuse efficiency is high and the economic benefits are good.Finally,the actual operation proves that the automatic monitoring and control system of broadcast television transmitter runs stably,has good real-time performance,improves work efficiency and has good application prospects.