Research And Application Of Train Proximity Warning System Based On Embedded Technology

Because of the particularity of railway engineering itself,there is a high risk in the construction process,which makes the personal safety of the construction personnel and the safety of the use of railway engineering construction threatened,and even will cause very serious personnel and railway train accidents.In addition,the existing train control system also has many unpredictable minor problems,may cause many unpredictable disaster consequences,and cannot be timely prevention and control.In order to solve the above problems,this thesis designs and implements a special train proximity warning system as a collision prevention and disaster prevention system to provide auxiliary warning information for driving safety.The system consists of ground monitoring equipment,on-board equipment,positioning equipment and wireless communication equipment.As an important part of the system,the on-board equipment receives the warning code signal from the ground monitoring equipment through the wireless communication technology,which uses the FFSK modulation to carry on the digital-analog conversion,refers to the CRC check,the communication protocol plus the decryption algorithm and so on to reduce the error rate of the signal transmission in the air,ensures the accuracy of the signal transmission,and finally,through the intelligent voice synthesis technology,realizes the voice broadcast of the relevant alarm information,and prompts the locomotive crew to drive according to the relevant regulations.The front end of the system uses the reusable MVVM architecture to display the monitoring data in real time,the back end uses the MySQL database to store the data,and obtains the real-time position of the driving train in time through the Beidou / GPS module,and uses the virtual private network VPN to exchange information to realize the alarm to the ride personnel.This thesis mainly introduces the hardware system design and implementation,wireless communication module,intelligent voice warning module and upload interface module software function design and implementation.This system takes ARM as the bottom control core,adopts the Beidou/GPS positioning,the wireless digital radio communication,the virtual private network VPN,the intelligent voice synthesis and so on advanced embedded technology realization,the structure is complete,the function is stable and reliable,has the very important realisticsignificance to promote the railway safety protection development progress.