文档介绍：摘要
智能公交系统是智能交通系统的重要研究内容,近年来出现了许多针对公交车辆智能化的研究与尝试,这其中就包括自动报站系统。目前,国内只有北京、上海、深圳、广州、青岛等城市实现了利用 GPS 自动报站,许多中小城市的公交车仍旧是传统的人工按键报站,没有实现完全的智能化,给司乘人员带来了很大的不便。因此,在中小城市中迫切需要智能化的公交车报站系统。
本文应用单片机技术、语音合成技术和点阵LED汉字显示技术设计了一种公交车语音报站和汉字显示系统,它能很好的模仿人完成报站任务,从而解决了人工报站不准确不方便等问题。本文设计的新型的公交车自动报站系统,以AT89C51单片机为核心,外扩ISD1730语音芯片,点阵LED汉字显示屏和行列驱动芯片。当汽车到达某站时,通过GPS模块来触发本系统进行工作,通过语音输出电路进行语音报站和提示,AT89C51单片机同时通过程序读取汉字信息送入LED点阵显示电路进行汉字提示,达到了在车辆运行期间显示和语音的同步,提高了车辆的服务质量。
本文是以AT89C51为主控芯片的进行了系统硬件电路设计,分析并设计了各单元电路,包括语音电路、LED显示电路、电源电路。利用C语言进行了程序设计,介绍了系统所采用的软件开发环境及其主程序设计,着重分析设计了LED显示模块、语音播放模块的实现流程,给出了大部分源代码。
本文设计的公交车自动报站及汉字显示系统具有使用方便、体积小、经济实惠、工作稳定、误报率低等特点。
关键词:单片机;GPS;LED汉字显示屏;ISD1730
Abstract
Advanced Public Transportation Systems (APTS) is an important part of Intelligent
Transport System (ITS), and many researches and attempts related to the intelligent publictransport vehicles e forth during recent years. At present, many city buses in China are still the traditional manual buttons on station except Beijing, Shanghai, Shenzhen, Guangzhou,and Qingdao. Therefore, an intelligent bus-stop-announcing system is strongly required in thesecities.
This paper introduces the design principle of a new bus automatic stop reporting system, which centers AT89C51 Single Chip Micyoco, concerning ISD1730 speech chip, dot matrix LED character display screen and line driver chip. When a bus reaches a certain stop, it makes this system to work through the GPS module. That is, through the speech output circuit to carry out the work of voice announcement and presentation, and at the same time AT89C51 Single Chip Micyoco carries out the character display through the read of characters and delivery to the LED dot matrix display circuit. In this way, a synchronic cooperation of display and speech during the operation of the vehicle is reached and the service quality of buses is improved.
A design method of the Bus Station Report System based on AT89C51SND1C is
put forward. This part mainly discusses hardware design, in