基于单片机的数字温度计的设计

1、基于单片机的数字温度计的设计摘要本文描述了基于AVR，51单片机和温度传感器等器件设计的数字温度计电路的设计原理和实现方法。运用主从分布式的思想，由一台上位机、一台下位机构成多点温度数据采集系统，组成两级分布式多点温度测量的巡回检测系统，系统采用串行通信标准，通过上位机控制下位机进行现场温度采集，温度值既可以送回主控机PC进行数据处理，由显示器显示，也可以由下位机单独操作，实时显示当前各点的温度值，对各点进行控制。硬件包括：电源电路、显示电路、温度测试电路，报警电路，串行通信电路等。系统最大特点在于其软件设计使用层次化、模块化设计方法。经调试和测试，系统各项性能指标参数完全达到设计指标。系统采

2、用C语言进行编程，易于维护和修改。方案介绍了数字温度计系统的整体功能；其次介绍了各个模块的硬件模块电路设计，说明了相应元器件的选择和应用，阐述了各部分控制原理和软件调试。关键词 ： AVR；多点采集；无线传输 Based on the design of single chip digital thermometerAbstractThis paper describes the temperature sensor based on AVR ，51 microcontroller and other devices designed digital thermometer circuit d

3、esign principles and implementation. Thought the use of master-slave distributed by a stage crew, multi-point temperature lower machine data collection, composed of two distributed multi-point temperature measurement circuit detection system, the system uses a serial communication standard, through

4、the PC bit machine under the control of scene temperature acquisition, temperature returned to the host computer either PC for data processing, the display can also be a separate operation from the next-bit machines, real-time displays the current temperature value of each point on the control point

5、s. Hardware includes: power supply circuit, display circuit, temperature testing circuit, alarm circuit, the serial communication circuit. Most important feature of the system software designed for use in its hierarchical, modular design, simple mathematical model and control algorithm was able to s

6、implify and speed development. The debugging and testing, system performance parameters fully meet the design specifications. System uses the C programming language, easy to maintain and modify. Program introduces the system's overall function digital thermometer; next introduced each module har

7、dware circuit design, describes the selection and application of the corresponding components, describes the various parts of control theory and software debugging. key words：AVR；Multi-point acquisition；Wireless目 录论文总页数：34页目录11 引言11.1课题背景及意义11.2国内外的研究现状11.3课题的研究内容11.4课题的研究目的12 系统的方案设计与选择12.1上位机电源模块论证与选择12.2 LCD显示模块方案论证与选择22.3 按键模块方案论证与选择22.4 温度采集模块方案论证与选择22.5上位机和下位机无线通信模块选择33 硬件模块设计33.1上位机硬件电路设计33.1.1上位机电源设计33.1.2 FYD12864液晶显示模块设计43.1.3系统时钟芯片设计63.1.3按键及其报警模块93.1.4无线模块103.2下位机硬件设计113.2.1下位机主控器设计113.2.2温度传感器设计133.2.3无线模块设计174 系统软件模块设计184.1上位机的软件流程图184.3下位机的软件流程图185 调试19结 论20参考文献21致 谢22声 明23附录