通用型电子站牌LED显示系统的研发与设计

发布时间：2018-04-27 07:23

本文选题：电子站牌 + 嵌入式　；参考：《华东理工大学》2017年硕士论文

【摘要】：随着我国经济发展、城市化进程加快,人们对城市基础设施要求变高,传统的静态公交站牌已经不能满足乘客,于是提出了电子站牌的概念。所谓电子站牌,是以动态的方式,在传统站牌基础上给乘客及时提供车辆到站、车辆延误等情况,方便乘客出行,提高社会服务水平与质量。但是,大部分的电子站牌暴露在户外,并且由于现场环境的不可控性,往往会对电子站牌的运行产生一定影响。因此,如何提高电子站牌的预报站准确性、降低故障率以及增强电子站牌的预报站效果具有非常重要的意义和作用。本文主要研究了公交电子站牌系统中LED控制卡鲁棒性的改进、预报站效果的改进以及通信方面稳定性的增强等。LED控制卡以2G/3G的GPRS网络作为数据接收介质,UPD作为通信协议,RS232/485作为内部传输方式,以意法半导体公司的Crotex-M3芯片STM32F103作为主控芯片、Altera公司的EP1C3T144芯片作为LED控制芯片。其中,在UDP协议的基础上进行了改进提高了通信的稳定性及效率,针对LED的显示方式通过将算法移植到FPGA中提高了显示效率,降低了系统的复杂度,并且针对户外型的电子站牌在鲁棒性上做了改进。最后,整个公交电子站牌优化升级后,将系统在实际应用中进行测试,该型号公交电子站牌已经通过测试,并在江苏、安徽等省份中多个城市投入运行,运行情况良好,市民反映积极。
[Abstract]:With the development of China's economy, the process of urbanization accelerated, and the demand for urban infrastructure became higher. The traditional static bus stop cards had been unable to meet the passengers, so the concept of electronic station cards was put forward. The so-called electronic station card, in a dynamic way, provided passengers to the station and vehicle delay on the basis of the traditional station card. It is convenient for passengers to travel and improve the level and quality of social service. However, most of the electronic station cards are exposed in the outdoor, and the uncontrollability of the field environment will often have a certain influence on the operation of the electronic station card. Therefore, how to improve the accuracy of the forecast station of the electronic station, reduce the failure rate and enhance the forecast station effect of the electronic station card. This paper mainly studies the improvement of LED control Kalu in the bus electronic station card system, the improvement of the effect of the forecast station and the enhancement of the stability of the communication, and the GPRS network of 2G/3G as the data receiving medium, the UPD as the communication protocol and the RS232/485 as the internal transmission mode. The Crotex-M3 chip STM32F103 of Italy semiconductor company is used as the main control chip, and the EP1C3T144 chip of Altera company is used as the LED control chip. Among them, the stability and efficiency of the communication are improved on the basis of the UDP protocol, and the display efficiency of the LED is improved by transferring the algorithm to the FPGA, and the system is reduced. In the end, the system is tested in practical application, and the bus electronic station card has passed the test and has been put into operation in many cities, such as Jiangsu, Anhui and other provinces, and the public is in good condition and the citizens reflect. Positive.

【学位授予单位】：华东理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U491.17

【参考文献】