基于以太网的考试指令播报系统

An Exam Instruction Broadcast System Based on the Ethernet

针对标准化考场建设的需要,设计了一种基于以太网的考试指令播报系统。系统由卫星时间接收装置、考务系统和多个考场终端共同组成。考务系统负责各个考场终端系统时间同步校准、发送考试指令、网络参数配置、升级下位机程序等远程网络化管理。考场终端以STM32F107嵌入式处理器为核心,包含以太网接口电路、LED点阵屏显示控制电路、文本语音合成电路等,通过以太网接收考务系统的各种指令并完成相应功能。考试期间的各种考试指令和考试时间由LED点阵屏显示文字信息并使用文本语音合成技术将其播放。系统经过学校期末考试、全国大学生英语等级等大型考试实际运行测试,切实有效,可靠性强,具有较强的推广价值。

In view of the needs of standardized examination room construction,an exam instruction broadcast system based on the Ethernet is designed. The system is composed of satellite time receiving device,examination system and multiple examination terminals. The examination system is responsible for the remote network management of the time synchronization calibration,the sending test instruction,the network parameter configuration,the upgrade lower computer program and so on. The examination terminal is based on embedded processor STM32F107,that including the Ethernet interface circuit,LED dot screen display control circuit,text speech synthesis circuit and so on. It receives various instructions of the examination system through the Ethernet and completes corresponding functions. During the examination,all kinds of examination instructions and examination time are displayed by LED dot matrix screen,and the text is broadcasted by text speech synthesis technology. The system has been tested by the final examination of the school term and national college English test for college students. It is effective and reliable,and has a strong promotion value.