多用途无线呼叫系统的研发设计论文.doc

PAGE 多用途无线呼叫系统的研发 摘 要 随着科技的进步以及对生活质量要求的不断提高，人们要求在消费中得到的服务更加快捷、方便、舒适，所以无线呼叫系统应运而生！ 本文介绍了基于51系列单片机控制远程（距离大于50米）呼叫信息，并将这些信息经过编码解码后,用数码管显示出呼叫信息（子机的位置）的具体实现过程。设计有三个模块组成：单片机控制下的无线发射模块、单片机监控下的无线接收模块及信息显示模块。即由多个子机（无线发射机）和一个母机组成，经过编码的信息由子机发射，母机接收到呼叫信息后，首先判断该呼叫是否是本系统子机群的呼叫，如果是本系统子机群的呼叫，显示呼叫信息。子机中AT89C2051控制数据信息的发送，编码芯片PT2262对信息进行编码，然后送给发射头，经过发射头将信息发送出去；母机中接收到信息后送给解码芯片PT2272，PT2272进行解码，然后将解码信息传送给单片机AT89C52，最后通过数码管驱动及键盘控制芯片CH452驱动将信息在数码管上显示出来，这些数据反映呼叫信息所处的位置或具体需要，并且每次呼叫显示以后，通过按键来清除上一次的显示信息，确保下次信息接收的畅通。 本文详细分析了上述实现原理，给出了主要程序部分，并通过了测试，有较强的实用价值。 关键词：?51系列单片机，PT2262, PT2272, CH452? Development of Multi-Purpose Wireless Call System ABSTRACT With the advancement of technology and the improvement of the life quality demands continuesly, in communication consumption, people want to get the services faster and more convenient, comfortable, so that wireless call system comes into being! This paper introduces the Series 51-based remote control microcontroller (a distance of more than 50 meters) call information, After such data code, digital pipe show call information (sub-machine location) is a concrete realization of the process. This design includes three modules : the module of the wireless transmitter controlled by MCU, the module of the wireless receiver monitored by MCU, and information display module. That is, by a number of sub-machine (wireless transmitter) and the composition of a mother, after coding information from the machine launched mother received call information, the first judgment call whether the system is a fleet-Call, If the system is a fleet-Call, Call information shows. AT89C2051 machine-control data messages sent, Coder PT2262 encode the information, then were sent to launch the first, after the first launch will send out information; mother received the message given to the decoder chip PT2272, PT2272 decode Information would then be transmitted to the decoder AT89C52. Finally driven by the digital control chip and keyboard-driven ch452 information in the