毕业设计---简易多种传感器信号测试仪设计.doc

简易多种传感器信号测试仪设计 ——AD590温度测试仪 摘 要 本课题主要介绍了温度的硬件电路的设计和软件设计。硬件电路主要包括主控制器，测温电路和显示电路等，控制器采用单片机AT89C51，温度传感器采用美国DALLAS半导体公司生产的AD590，显示电路采用位共阳极LED数码管以动态扫描法直读显示。系统程序主要包括主程序，读出温度子程序，温度转换命令子程序，计算温度子程序，显示数据子程序等。此外，还介绍了系统的调试和性能分析。 AD590、ADC0804、AT89C51 Abstract: This topic mainly introduces the temperature sensor of hardware circuit design and software design of the system. Hardware circuit include Lord controller, temperature measurement circuit and display circuit by single chip microcomputer AT89C51, controller, the temperature sensor using the American DALLAS semiconductor company produces the AD590, show circuit with 3 a total of anode LED digital dynamic scanning tube method to read display. Straight The system includes main program, the program read temperature procedure, the temperature conversion command subroutine, the calculation of temperature subroutine, display data refresh procedure, etc. In addition, it introduces the system of debugging and performance analysis. Keywords: AD590, ADC0804, AT89C51 目 录 第一章 绪论..................................................................1 1.1课题背景及意义.........................................................1 1.2课题应用前景............................................................1 第二章 总体设计方案......................................................2 2.1 总体设计框图..........................................................2 2.2 总体设计方案分析.....................................................2 第三章 硬件设计原理......................................................3 3.1 总原理图及工作原理分析............................................3 3.2 AD590传感器检测电路单元.............................................3 3.3 放大电路.......................................................5 3.4 A/D转换电路单元.......................................................6 3.5 CPU主控电路单元......................................................10 3.6 显示电路单元............................................................14 3.7 供电电源单元...............................................