速度转速数字测量系统设计(AT89C51,含CAD电路图)

速度转速数字测量系统设计(AT89C51,含CAD电路图)(任务书,开题报告,外文翻译,论文说明书8600字,CAD电路图1张)    
摘 要
本次设计顺应了数字化的趋势，使用数字式测量方法，以便进一步地提高测量的精确度，而且以单片机为核心的系统测试速度更快，适用范围更广。
本次设计我使用测频法设计硬件电路，霍尔传感器为UGN3144，传感器测量到的信号经过稳定、放大、整形输入到单片机中。单片机为AT89C51，包含了主控电路、驱动电路、显示电路、复位电路、时钟电路和键盘电路，集成化程度高。软件部分可以使用Keil进行编程。电气原理图可以使用Protel软件连接所有电路元件来制作。最后进行了基本的误差分析，测试表明该系统测速精度高，满足设计要求。

关键词：转速测量；霍尔传感器；单片机

Design of speed digital measuring system
Abstract
This design conforms to the digital trend, the use of digital measurement methods, in order to further improve the accuracy of the measurement, but also with the core of the system to test the system faster, more widely applicable.
In this design, I use the frequency measurement method to design the hardware circuit, the  monolithic integrated circuits sensor is UGN3144, the sensor measurement signal after stable, amplification, shaping input to the microcontroller. The MCU is AT89C51, including the main control circuit, driving circuit, display circuit, reset circuit, clock circuit and keyboard circuit. Software components can be programmed using Keil. Electrical schematic can be used Protel software to connect all the circuit components to produce. Finally, the basic error analysis is carried out. The test shows that the system has high precision and meets the design requirements.

Keywords： monolithic integrated circuits; speeds measure; Hall element
 

目 录
摘要.....................................................Ⅳ
第一章 绪论..............................................1
第二章 转速测量系统介绍..................................2
2.1 转速测量一般步骤..................................2
2.2 转速测量原理......................................4
2.2.1 测频法“M法”................................4
2.2.2 测周期法“T法”..............................4
2.2.3 测频测周法“M/T法”..........................5
第三章 系统硬件设计......................................6
3.1 转速测量原理的选择................................6
3.2 霍尔传感器.........................................6
3.2.1 霍尔效应......................................6
3.2.2 霍尔元件......................................8
3.2.3 UGN3144霍尔开关元件..........................9
3.3 单片机............................................12
3.3.1 AT89C51主控电路..............................12
3.3.2 驱动器.......................................13
3.3.3 显示电路.....................................14
3.3.4 复位电路.....................................16
3.3.5 时钟电路.....................................17
3.3.6 键盘电路.....................................18
第四章  软件系统设计.....................................19
4.1软件设计的总体思路.................................19
4.2 子程序设计........................................20
4.2.1 转速计算程序.................................20
4.2.2 二-十进制转换程序............................21
4.2.3 显示程序.....................................22
第五章  转速分析.........................................23
5.1 速度范围..........................................23
5.2 测量误差..........................................23
总结.....................................................24
参考文献.................................................25