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直流电机霍尔测速仪(具有红外遥控)设计报告..doc

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直流电机霍尔测速设计报告 1340909120许绍立 1340909121陈志铜 摘 要 在工程实践中,经常会遇到各种需要测量转速的场合,例如在发动机、电动机、卷扬机、机床主轴等旋转设备的试验、运转和控制中,常需要分时或连续测量和显示其转速及瞬时转速。要测速,首先要解决是采样问题。在使用模技术制作测速表时,常用测速发电机的方法,即将测速发电机的转轴与待测轴相连,测速发电机的电压高低反映了转速的高低。为了能精确地测量转速外,还要保证测量的实时性,要求能测得瞬时转速方法。因此转速的测试具有重要的意义。 关键词:电动机 单片机 传感器 目录 1 概述·····························································3 本课题设计的目的和意义··········································3 数字式转速测量系统的发展背景····································3 2 单片机··························································4 2.1 单片机STC89CC52RC介绍··········································4 3 速度检测模块···················································9 3.1霍尔传感器测量··················································9 3.2双电压比较器LM393··············································10 4 转速测量模块··················································14 4.1 转速测量方法···················································14 4.2 转速测量原理···················································15 5 显示模块·······················································17 5.1 1602字符型LCD简介·············································17 6 红外遥控模块··················································19 7 系统硬件设计··················································22 8 系统软件设计··················································23 8.1 主程序流程图程序流程图·········································23 总结·······························································25 参考文献···························································25 附件·······························································26 1.概述 1.1 本设计课题的目的和意义 在工程实践中,经常会遇到各种需要测量转速的场合, 例如在发动机、电动机、卷扬机、机床主轴等旋转设备的试验、运转和控制中,常需要分时或连续测量和显示其转速及瞬时转速。要测速,首先要解决是采样问题。在使用模技术制作测速表时,常用测速发电机的方法,即将测速发电机的转轴与待测轴相连,测速发电机的电压高低反映了转速的高低。为了能精确地测量转速外,还要保证测量 1.2 数字式转速测量系统的发展背景 目前国内外测量电机转速的方法很多,按照不同的理论方法,先后产生过模拟测速法(如离心式转速表、用电机转矩或者电机电枢电动势计算所得)、同步测速法(如机械式或闪光式频闪测速仪)以及计数测速法。计数测速法又可分为机械式定时计数法和电子式定时计数法。传统的电机转速检测多采用测速发电机或光电数字脉冲编码器,也有采用电磁式(利用电磁感应原理或可变磁阻的霍尔元件等)、电容式(对高频振荡
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