电子信科学与技术专业 毕设论文.docVIP

本科毕业设计(论文) 题目： 院 （系）： 专 业： 班 级： 学 生：学 号： 指导教师： 2009年月 　　　　　　　　　　　　　　　　　　　　　　　　 摘 要载波技术的发展,应用低压电力线作为传输媒质，采用扩频、数字编码、单片机控制等技术实现病房呼叫已成为可能。为了克服无线式病房呼叫系统易受电磁干扰，而且容易对一些特殊仪器和特殊病人的影响， 故本文运用电力载波技术设计了一种病房呼叫系统。 本设计旨在应用于AT89C52单片机按照笔者制定的的编码方式通过电力载波发送数据，在其基础上制作了基于电力载波的病房呼叫系统。当某一房间出现病情时，发送预先设定好的本地地址码，由调制电路调制后，通过电力线向外发送；再经接收译码电路调制解调，取出信号并译码出地址同时发出声光警报。让医院能够准确及时响应病人的呼叫。 该系统无需为数据传输专门布线，适合旧病房改造，具有一定的可行性和应用价值。 关键词 Wards calling system based on the power line carrier technology Abstract With the development of the power line carrier technology, we also can apply the low-voltage power line as a transmission medium, using the spread spectrum, digital encoding. the control technology of single-chip ,we can achieve Call Ward as possible.In order to overcome the wireless call system that electomagnetic vunlnerable interference, whlie it easy for effecting some special equipment and special patient, So in this paper,the design use the power line carrier technology to achieve wards calling system. The author designs the encoding of data with the AT89C52 MCU intended for sent through the power line carrier,for its base we product the Wards calling system based on the power line carrier technology.When a room disease appears, send pre-configured local address code, and modulation by the modulation circuit, it sends out through the power line; then through the decoding circuit receiving modem, recover the signal and decoding address at the same time whlie send sound and light warning. The hospitals can allow to respond to the patients call accurate and timely. It is no need for special wiring arrangement for the data transmission，so it was suitable for the old ward reformation，and of some feasibility and some application value. Key Words: MCU;power line carrier;coding;data communications 目录 中文摘要 Ⅰ 英文摘要 Ⅱ 主要符号表 Ⅲ 1 绪论 1 1.1前言 1 1.2课题研究背景与意义 1 1.3病房呼叫系统的研究现状 1 1.4本文主要研究内容 2 1.4.1本设计的主要内容 2 1.4.2设计的功能和特点 2 2病房呼叫系统的设计 3 2.1设计方案的确定 3 2.2设计方