电子技术综合训练 (2)

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1、电子技术综合训练设计报告题目：电机转速的T法测量学院：电信学院班级：电气工程及其自动化2班姓名：张瑞云学号：11230232同组成员：杨小龙滕海峰马龙张瑞云指导教师：王晓兰完成日期：摘要通过阅读任务书及查阅相关资料，我们得到了电机转速的T法测量。电动机转速的准确检测，在直流调速系统、交流调速系统及其他场合有广泛应用。电动机转速测量的基本方法是，与电动机同轴连接光电脉冲发生器（光电码盘），则光电脉冲发生器的输出脉冲频率与转速成正比。通过测量脉冲发生器的输出脉冲频率，可以测量电机转速并判别其旋转方向。下图为常见的光电码盘在电机正转、反转时输出的波形。我们的设计，采用了十进制计数器74LS

2、160对光电码盘送入的脉冲进行加计数，采用了D触发器和与门作为计数电路的控制，采用了两个单稳态触发器控制锁存和清零，采用了555构成多谐振荡器产生时基脉冲，采用了CD4511驱动数码显示器得到时基脉冲数，从而得到电机的转速。关键词：74LS160，脉冲，转速AbstractWiththedevelopmentofscienceandtechnology,themotorspeedisconcernedbymoreandmorepeopleMotorspeedaccuratelydetectionindcspeedregulatingsystem,acspeedregulationsy

3、stemandotherplaceshaveawiderangeofapplications.Motorspeedmeasurementisthebasicmethod,connectedtothemotorcoaxialphotoelectricpulsegenerator(lightcodedisc),thephotoelectricpulsegeneratoroutputpulsefrequencyisproportionaltothespeed.Bymeasuringtheoutputpulsefrequencyofthepulsegenerator,motorspeedan

4、djudgingthedirectionofrotationcanbemeasured.Belowforcommonlightcodediscinthemotorforwardandinversionoftheoutputwaveform..Byreadingthebookandrelateddocuments，wegetthedesignforthemotorspeedmeasurementmethodofT.Inourdesign,weusepulse74LS160decimalcounteronthephotoelectricencodertothecountphotoelec

5、tricencoder,theDtriggerandgateasthecontrolcountcircuit,twomonostabletriggercontrollatchandclear,theresultingmultiharmonicoscillatortimingpulse555,theCD4511drivedigitaldisplayastime-basedpulsenumber,accordingtothecalculationofthemotorspeedpulseinordertogetthespeedofmotor.Keywords:74ls160,pulse，s

6、peed目录1引言·······························1.1电机在国民经济中的作用······························1.2电机的发展··········································2方案选择与设计·······································2.1设计题目············································2.2设计内容············································2.2.1概述·····

7、·········································2.2.2测速的技术指标····································2.2.3T法测速的基本原理································2.3.4T法测速的指标计算································2.3任务及要求········································3