红外遥控发射与接收系统设计专 业： 机械工程学院测控技术与仪器摘要简单地介绍了红外线遥控发射、接收系统的原理，给出用 MC145026/MC145027 作为遥控接收系统编、译码器的一种巧妙实现方法。该系统具备一个发射装置和一个接收装置；接收装置中具有 4 个开关控制的设备。遥控距离大于 5m。设遥控系统的载波频率为 40KHz。它包括红外遥控发射、接收的原理图及其红外接收电路 、红外发射电路接收、发射红外光信号并将其转换成串行代码的过程。由红外接收管 PH3028 接收的光信号经 CX20256 进行限幅放大、带通滤波、解调和信号整形,可以消除杂散的电磁干扰或瞬间接收到的红外光干扰信号，提高产品的可靠性。红外线遥控接收装置具有体积小，功耗低、功能强、成本低等特点。关键词： 红外遥控发射、接收系统AbstractSimply introduced fired infrared remote control, the principle of the recei-ving system, is used as a remote receiver system MC145026/MC145027 series, a decoder ingenious methods. This system has a launch of device and a receiving device; The receiving device has four switches in the control of the equipment. Remote control range is more than 5 m. Remote Control System for the carrier frequency is 40 KHz. It includes infrared remote transmitting and receiving schematic circuits and infrared receivers, infrared transmitter receiver fired infrared optical signal and convert serial code into the process. PH3028 by the infrared receiver of the optical signal received by the CX20256 for limiting enlarge, band-pass filtering, signal demodulation and plastic, can eliminate stray electromagnetic interference or receive instant infrared light interference letter.Key words:Infrared remote trsnsmiting and receiving system 目录1......…...系统方案的比较2 ......... 系统方案设计2.1...... 系统设计组成框图2.2......…...电路功能简介2.2.1......…... 键盘及其代码产生电路2.2.2......…...编码电路 2.2.3......…...调制振荡电路；2.3......…...单元电路设计2.3.1......…...键盘及其代码产生电路...
