电机转速测量电路.doc

桂林电子科技大学课程设计论文第PAGE\*MERGEFORMAT21页

课程设计(论文)说明书

题目：电机转速测量电路
院（系）：信息与通信学院
专业：电子科学与技术
学生姓名
学号：
指导教师：何宁
职称：教授

2012年12月20日

摘要

本文设计了一种基于AT89S52单片机的红外线转速测量系统。该系统的红外发射与接收采用直射式，红外发光管射出的红外线通过圆盘的小孔照射到红外探头上，接收电路再经过简单的信号处理得到脉冲式的转速信号。使用AT89S52单片机采样脉冲信号并计算每分钟内脉冲信号的数目，即电机对应的转速值，最终系统通过四位七段数码管显示电机每分钟的转速值。本文详细分析了系统的组成及工作原理，给出了系统中各硬件模块设计方法及系统软件设计方法，给出了部分程序流程图和程序清单。该测速系统安装维护方便，工作稳定，运行可靠，具有较大的推广应用价值。

关键词：转速测量；红外发射与接收；单片机

Abstract

AinfraredspeedmeasuringsystemwhichbasedontheMCUofAT89S52wasdesignedinthispaper.Theinfraredtransmitterandreceiverofthesystemusedthedirecttype.TheinfraredlightemittedfromtheIRLEDpassedthroughtheholeinthedisctotheinfraredsensor,andthereceivercircuitoutputapulsedinfraredsignalbyasimplesignalprocessing.TheAT89S52wasusedtosamplethepulsesignalandcalculatetheamountofthepulsesignalperminutewhichwasthevalueofthemotorspeed.Finallythevalueofthemotorwouldbedisplayedreal-timebyfour-bitseven-segmentdigitaltube.Thecompositionandtheprincipleofthesystemarepresented,andthedesignmethodofhardwareandthesoftwarearealsopresented.Themeasurementsystemwillhaveabroadprospectsbecausetheconvenientinstallationandmaintenance,stableworking,reliableoperation.

Keywords:Speedmeasurement;Infraredtransmitterandreceiver;MCU

目录

引言································································3
1设计要求······················································4TOC\o"1-3"\h\u
1.1设计目的················································4
1.2设计内容及要求·············································4
HYPERLINK\l_Toc17072转速测量系统的原理·······································4
2.1转速测量方法················································4
2.1.1M法(测频法)··············································4
2.1.2T法(测周期法)············································5
2.1.3M/T法(频率/周期法)·······································5
2.2转速测量原理················································5
3系统概述················································6
3.1转动系统················································6
3