1、1 摘要摘要 公交车已经成为一般工薪族和学生族出门必须的交通工具， 目前公交车上采 用的公交报站系统具有语音和显示报站的基本功能， 但由于报站时采用司机手动 切换，一方面增加了司机的劳动强度，另一方面由于司机的误报或漏报，造成乘 客误下或漏下，对于公交运营产生了很大负面影响，跟会对乘客造成很多不必要 的影响。为此，研究公交车自动报站系统是非常必要的。 本课题主要研究的是基于 AT89C51 单片机、GPS9543LP 全球定位模块和 ISD1700S 语音芯片的公交车自动报站系统，该系统利用 GPS 模块测得的经纬度 信息与存储在单片机中的站点的经纬度信息相比对，无论上行线路，还是下行线 路，
2、均能准确判断是否到站。同时，采用基于文本的语音合成技术，真正实现了 全自动、准确地播报站名。 Abstract The public transportation has already became the general wage race and the student race went out must the transportation vehicle, at present on the public transportation uses the public transportation newspaper station system had the basic func
3、tion which the pronunciation and the demonstration newspaper stood, but because the newspaper stood time used the driver manual cut, on the one hand increased drivers labor intensity, on the other hand because drivers misinformation or failed to report, created the passenger by mistake under or the
4、mild chronic bloody vaginal discharge, has had the very greatly negative influence regarding the public transportation operation, could have very many nonessential influences to the passenger.Therefore, studies the public transportation automatic newspaper station system is extremely essential. This
5、 topic main research is based on at89C51，GPS9543LP，ISD1700S public transportation automatic newspaper station system front, System that uses longitude measured information and store the GPS module in single-chip microcomputer in the longitude of sites compare information on， uplink, is also a downwa
6、rd line, are able to determine accurately whether arrives.At the same time, based on the text of the speech synthesis technology, truly automatic, accurate broadcast stations. 2 目录目录 1 绪论绪论.3 1.1 课题研究的背景及意义3 1.2 报站器的动态发展趋势3 1.3 设计的主要目标任务4 2 方案方案.5 3 系统器件选型系统器件选型.6 3.1 AT89C51 的简介.6 3.1.1 主要性能.6 3.1.2 引脚功能说明.7 3.2 GPS9543LP 定位模块9 3.3 ISD1700S 语音芯片10 4 系统硬件研究与设计系统硬件研究与设计12 4.1 各部分电路.13 4.1.1 单片机的最小系统13 4.1.2 JHD162A 液晶显示电路13 4.1.3 ISD1700S 音频输出电路及按键电路13 4.1.4 GPS 模块接口电路.13 5 系统软件研究与设计系统软件研究与
