Design And Realization Of Vehicle Security Forewarning System Based On RTEMS

The car is a double-edged sword,and its rapid development in the human transport to bring great convenience,but also bring painful traffic accidents,which is a huge problem for long troubled traffic participants.In recent years,with the embedded control technology,sensor technology and the rapid development of information fusion technology to prevent traffic accidents as the main purpose of the vehicle active safety technology has been rapid development.From the early automotive dynamics stability control technology and automotive chassis integrated control technology,to the present based on the human-car dangerous state monitoring of security early warning technology.This technology has greatly improved the safety and comfort of the car,and has become an important area of automotive technology development.In this paper,a kind of vehicle safety early warning system based on RTEMS is designed.The system not only realize the safety warning of the driving state of the automobile,but also collect,store and upload the driving behavior data of the driver,and provide the basic data for the research and analysis of the traffic safety large data.Based on the functional requirements of the system,this paper first determines the overall implementation of the system.The functional modules of the system are divided,and the data interaction scheme between the functional modules is designed to ensure the accurate and effective transmission of the data.Secondly,the hardware platform of the security early warning system is designed,and the S3C2416 is the core processor of the system.Taking the CAN controller chip MCP2515 as the core data acquisition unit,the important traffic parameters such as the warning information of the system are collected.MT3732 as the system of data transmission unit,to achieve vehicle and network collection platform between the two-way interactive communication.Aiming at the complicated vehicle electromagnetic environment,an improved DC-DC converter circuit is designed to realize the power supply to the vehicle safety early warning system.Finally,according to the design of the hardware circuit to complete the system software design,the use of real-time RTEMS operating system design of the multi-process application of the upper application.To solve the communication between the tasks and synchronization problems,the perfect realization of the vehicle safety warning and through the 3G wireless network to upload the purpose of warning information.The test results show that the system overcomes the complex electromagnetic compatibility environment of the vehicle,and realizes the high speed,reliable and real-time communication between the vehicle and the network service platform,and has high practical value.