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课程设计 智能化多功能转速表设计 共38页、15810字
摘要
系统采用89C51单片机为核心以实现转速测量。转速信号由TMI15-1 型集成转速传感器及二分频电路提供。根据转速值的大小，通过门控方式和中断方式计数。计数脉冲由ALE信号经四分频送到89C51的T0脚。计得脉冲数目后由软件进行计算、控制，所得转速值由单片机的串行口送出显示。该系统通过人机对话，根据应用场合的不同，可以在面板上设置不同的报警值，并配以相关的报警电路。另外，设计了打印机接口电路，从而可以获得相关的数据供分析使用。系统利用2732进行了程序存储器的扩展，为转速值的保存提供了保证。除此，系统还能够保持转速峰值并适时进行显示。该智能转速表抗干扰能力强，输入信号幅度范围广；测量范围广，误差小，操作方便简单。
关键词：智能转速表；集成传感器；分频电路
ABSTRACT
89C51 microcontroller system is at the core in order to achieve speed measurement. Speed signal is from TMI15-1 speed sensor integration and the provision of sub-frequency circuits. According to the size of speed there are the gated mode and interrupt count. Count the ALE signal pulse frequency quarter,which is to the feet T0. After getting the number of the counting pulse ,it is calculated and controlled by the software.Then speed of proceeds is delivered from the serial port out to show. The man-machine system through dialogue, according to the different applications can be set up in different panels alarm level, and printed circuit related to the alarm. In addition, the printer interface circuit is designed, which can be related to the use of data for analysis. System uses 2732 for the expansion of the program memory, which provides a guarantee on the preservation of values. Furthermore, the system can maintain and timely display peak speed. The Intelligent Speed Table has the anti-interference capability, a wide range of input signal amplitude measurement, and convenient operation.
Key words: intelligent ratemeter; integrated sensor; frequency dividing circuit
目 录
1 绪论………………………..……………………………….………………………….1
1.1 课题背景及目的………………………..……………………………….………..1
1.2 国内外研究状况………………………..……………………………….………..2
1.3 课题研究方法………………………..……………………………….…………..4
2 硬件设计………………………..……………………………….…………………….5
2.1 系统原理………………………..……………………………….………………..5
2.2 系统框图………………………..……………………………….………………..5
2.3 系统原理图………………………..……………………………….……………..6
2.4 微控芯片………………………..……………………………….………………..6
2.4.1 主要特性………………………..……………………………….………...6
2.4.2 振荡器特性………………………..……………………………….……...7
2.5 传感器接口电路………………………..……………………………….………..8
2.5.1 KMI15-1型传感器的性能特点………………………..…………………..8
2.5.2 工作原理………………………..……………………………….………...8
2.5.3 安装方法………………………..……………………………….………...10
2.6 静态数码管显示电路………………………..……………………………….…..11
2.7 打印机接口电路………………………..……………………………….………..13
2.8 声光报警电路………………………..……………………………….…………..16
2.9 人机对话………………………..……………………………….………………..16
2.10 存储器扩展………………………..……………………………….……………18
3 软件设计………………………..……………………………….…………………….22
3.1 转速的测量………………………..……………………………….……………...22
3.1.1 门控方式计数………………………..……………………………….……22
3.1.2 中断方式计数………………………..……………………………….……23
3.2 串行显示子程序………………………..……………………………….………...24
3.3 打印及存储子程序………………………..………………………………………25
3.4 其他软件的设计………………………..…………………………………………26
3.4.1 功能键处理模块………………………..…………………………………26
3.4.2 峰值保持与峰值复位………………………..……………………………27
3.4.3 数字滤波程序………………………..……………………………………28
4 转速计算与误差分析………………………..………………………………………..29
4.1转速计算………………………..………………………………………………....29
4.2误差分析………………………..…………………………………………………29
5 结论………………………..…………………………………………………………..31
参考文献………………………..………………………………………………………..32
致谢………………………..……………………………………………………………..33
附录………………………..……………………………………………………………..34
附录A………………………..……………………………………………………..34