基于GPRS的LED显示屏控制系统的研究与设计

发布时间：2018-07-05 20:45

本文选题：LED + 控制模块　；参考：《山东科技大学》2011年硕士论文

【摘要】：随着科技的发展,LED广告屏的性能不断提高,并且价格越来越低,LED广告屏作为一种新型信息显示媒体在现代信息社会当中得到越来越多人的认可并被广泛的应用,目前广告屏的发展方向之一就是无线LED广告屏的设计与使用。本论文提出的无线LED广告屏的设计方案是针对尚未架设通讯线路与电源线路、人流较大、有广告宣传的价值地方,要求环境为露天并且被GPRS信号所覆盖。以MSP430F149单片机为控制核心,实现LED显示驱动、LED广告屏的无线通讯、LED太阳能收集、电源检测与控制等功能。硬件电路系统的设计采用了当前应用广泛的低功耗芯片MSP430F149作为控制器,结合其他CMOS芯片作为外围部件,搭建了一种典型的无线LED广告屏的硬件结构,配合太阳能供电发挥系统低功耗的特点,系统稳定可靠。充分利用了主控芯片自带的AD转换功能对蓄电池电压进行实时采样,提高了电源检测的精度,保证了系统供电系统的稳定。无线信息传输采用了SIM300C模块,利用GPRS无线网络传输对字模和控制命令进行信息可靠传输,对字模编码的读取与匹配在控制模块进行,避免了大量数据量的无线传输问题,使无线信息传输更简洁稳定,提高传输可靠性。上位机编程采用了VB,实现的文字到字模的转换和字模与控制命令的发送。下位机采用了采用模块化的程序设计方法,分为了系统控制模块与LED驱动两部分,各部分下分多个程序功能模块,将各个功能模块分别进行独立编程。
[Abstract]:With the development of science and technology, the performance of LED advertising screen has been improved, and the price of LED advertising screen is getting lower and lower. As a new type of information display media, LED advertising screen has been recognized by more and more people and widely used in modern information society. At present, one of the development directions of advertising screen is the design and use of wireless LED advertising screen. In this paper, the design of wireless LED advertising screen is aimed at the communication lines and power lines that have not been set up, the large flow of people, the value of advertising, the environment is open and covered by GPRS signals. With MSP430F149 single chip microcomputer as the control core, the functions of LED solar energy collection, power detection and control of LED advertising screen driven by LED display are realized. The design of hardware circuit system uses MSP430F149, a widely used low power chip, as controller, and other CMOS chips as peripheral components to build a typical hardware structure of wireless LED advertising screen. The system is stable and reliable with solar power supply and low power consumption. The AD conversion function of the main control chip is fully utilized to sample the battery voltage in real time, which improves the accuracy of the power supply detection and ensures the stability of the power supply system. SIM300C module is used for wireless information transmission, GPRS wireless network transmission is used for reliable transmission of font and control commands, and the reading and matching of font encoding is carried out in the control module, which avoids the problem of wireless transmission of a large amount of data. Make wireless information transmission more concise and stable, improve transmission reliability. The upper computer uses VB to realize the conversion of characters to fonts and the sending of font and control commands. The lower computer adopts the method of modular programming, which is divided into two parts: system control module and LED driver. Each part is divided into several program function modules, and each function module is programmed independently.
【学位授予单位】：山东科技大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TN873

【相似文献】