【作者】 肖娟；

【导师】 夏应清；

【作者基本信息】 华中师范大学 ， 电路与系统， 2013， 硕士

【摘要】 不停车收费系统(Electronic Toll Collection,简称ETC)是智能交通系统中最成熟的应用之一。随着我国对智能交通领域的越来越重视,ETC系统得到了大力推行,ETC用户数量也呈现稳步增长趋势。由此在研发、生产过程中保障产品的性能与品质成为极为重要的问题。虽然目前市面上也有少量ETC监测设备出现,但大都只能实现被动的监听,无法快速定位系统故障,及时有效解决问题。本课题就是在此基础上提出与展开的——开发一款集DSRC设备模拟、链路通信测试、协议分析功能于一体的DSRC综合测试设备。在本项目中本人主要负责应用软件设计与开发,以下是应用软件实现的主要功能:1、实现空中信号监听,对链路信号进行分析,并能根据触发条件来保存波形与日志信息;2、模拟DSRC设备,实现与目标机通信,并对ETC交易过程进行分析与统计,完成相关参数计算;3、实现工程检测模式,对设备自身相关参数进行测量与校准。本系统的创新主要有:在实现链路监听功能的同时,也实现了 DSRC设备模拟,实现了一体化测试;创造性的使用码表文件实现了系统对DSRC协议的兼容性,为系统二次开发节约成本;根据本系统硬件设计特性,针对信号发送频率与调制度提出了新的算法。本系统的应用将大大降低DSRC设备生成测试成本、促进产品质量的提高。更多还原

【Abstract】 ETC(Electronic Toll Collection)system is one of the most mature applications in intelligent transportation systems.With the Government’s emphasis on the field of intelligent transportation,ETC system has been widely used and the number of users has also steadily increased.Safeguarding the equipment’s performance and quality become an extremely important issue in the research and development and build process.Although there is a small amount of ETC monitoring equipment,but it can be only a passive listener,cannot quickly locate and solve the problem in time.This thesis is put forward and expanded on this basis-develop a DSRC Composite Tester which can analog the DSRC equipment,test the communications,analyze the ETC protocol.In this project,the primarily responsibility is to design the application software.The following is the main function of the application software.1.Achieve the air signal monitoring,and analysis of the signal.Save the baseband signal and trade information according to the trigger conditions.2.Simulate DSRC equipment to communicate with the target machine.Analyze the ETC transaction process and achieve the relevant parameter measurement.3.Realize the engineering test mode in order to measure and calibrate the parameters of the equipment.The most prominent feature of the system is having realized the DSRC devices emulation as well monitor the air signal.The compatibility of DSRC protocol has been realized by using mask table file creatively.It also cost savings for the secondary development.Propose a new algorithm to calculate the transmission frequency and the modulation of the signal according to the hardware features of the system.The application of this system will greatly reduce the cost of generating test,and promote the improvement of product quality.更多还原