恒温水浴装置控制系统设计.docVIP

摘要 随着电子科技、测量和温度控制技术的迅速发展和广泛应用，在工农业生产中温度是一项重要的参数，而采用单片机对这些温度参数进行测量及控制已经成为当今的一项重要控制领域。 本设计以STC89C51单片机为核心设计了一套恒温水浴控制系统，重点阐述了工作原理和设计方法。温度信号采集选择的温度传感器是温度芯片DS18B20，并以数字信号的形式传送给单片机，通过单片机把温度信号显示在LED上。用四位一体共阳极 LED 数码管显示数据，继电器吸合使负载通电工作，用PNP三极管驱动。该温度控制系统主要包括硬件设计和软件设计两部分，其中硬件设计包括温度检测电路、温度控制电路和数码显示电路；软件设计包括主程序、数码管显示程序、按键扫描及按键处理程序、温度信号处理程序和超温报警程序等。单片机过对信号进行相应的处理，从而实现控制水温的效果。 关键词： AT89C51, DS18B20,温度控制 ABSTRACT With the rapid development and wide application of the electronic technology, measurement and temperature control technology, the temperature becomes an important parameter in industrial and agricultural production, and the control and the measurement of the temperature parameters by single chip microcomputer have become an important control area. This design regards the STC89C51 microcontroller as the core to design a set of control system of thermostatic water, focusing on the working principles and design methods. Temperature signal acquisition of the temperature sensor is temperature chip DS18B20, and transmitted to the microcontroller, in the form of digital signal to display temperature signal on LED. The quaternity common anode LED digital tube display the data, using relays to drive the load and the PNP transistor driver. The temperature control system mainly includes two parts, the hardware design and software design. The hardware design includes temperature detecting circuit, control circuit and digital display circuit; Software design includes the main program, digital tube display program, key scanning and processing, temperature signal processing program and overtemperature alarm program, etc. Single chip microcomputer processes the signal to achieve the effect of water temperature control. Key words: AT89C51, DS18B20, the temperature control 目录 第1章 绪 论 1 1.1 恒温水浴装置控制系统设计的背景 1 1.2 恒温水浴装置控制系统设计的意义 1 第2章 设计要求与方案论证 3 2.1 设计要求 3 2.2 系统基本方案选择和论证 3 2.3 电路设计最终方案决定 7 第3章 硬件 8 3.1 STC89C51芯片 8 3.2 DS18B20传感器 15 3.3 数码管 21 3.4 继电器 22 第4章 硬件电路设计