论文通信铁路道口高可靠性的道口设备设计说明书doc.docxVIP

摘 要 为改善铁路平面交叉道口尤其是站内道口的安全状况，有必要设计一种具有高可靠性的道口报警设备，当列车接近道口时告警，提示道口值班人员及行人、车辆注意，以确保列车安全通过，减少以至杜绝各种道口交通事故的发生[1]。 本论文所研究的语音及文字警示系统主要用于铁路道口的警示；采取语音播放及文字信息显示等措施，其中语音部分可采用两种方式，一是自动播放系统预先存储或录制的语音内容，二是通过系统连接的话筒进行人工语音播放；文字部分采用LCD显示屏显示预先存储的文字信息，该文字信息可与语音信息同步显示相同的内容，需要显示的文字信息和播放的语音内容均采用SD卡存储方式，易于修改（针对不同的应用场合只需修改SD卡上的数据内容即可），语音播放及文字显示可采用自动触发（系统外接主动红外入侵探测器等设备等）或人工操作两种方式。 关键词：SD卡，MP3语音，TXT，警示，C8051F340，VS1003 ABSTRACT To improve the security of the level crossing particularly inside crossing, it is necessary to design a highly reliable crossing alarm equipment, when the train is approaching the crossing, suggest duty pedestrian and the vehicles taking care of it. To ensure the safe passage of trains, reduce and eventually eliminate all crossing traffic accidents [1]. This thesis studied voice and text alerts system is mainly used for the railway crossing warning; take voice playback and text information display and other measures, including parts of speech can be used in two ways, one is automatic playback system pre-stored or recorded audio content, Second, the system connector of the microphone for artificial voice playback; text portion of LCD display previously stored text message, the text message can be synchronized with the voice information with the same content, the text information to be displayed and playback audio content are used SD card storage, easy to modify (for different applications simply modify the contents of the data on the SD card can be), voice playback and text display can be triggered automatically (system external active infrared intrusion detectors and other equipment, etc.), or manual operation two ways. KEY WORDS: SD card，MP3，TXT， warning， C8051F340，VS1003 目 录 TOC \o 1-4 \h \z \u HYPERLINK \l _Toc359590345 前 言 PAGEREF _Toc359590345 \h 1 HYPERLINK \l _Toc359590346 第1章 绪论 PAGEREF _Toc359590346 \h 2 HYPERLINK \l _Toc359590347 1.1 SD卡原理及内部结构 PAGEREF _Toc359590347 \h 2 HYPERLINK \l _Toc359590348 1.2 znFAT PAGEREF _Toc359590348 \h 6 HYPERL