水浴箱温度控制系统设计.docx

本文介绍了基于89C51单片机的水浴箱温度控制系统硬件电路的组成、工作 原理及软件设计方法。PTTOO温度传感器和精密电阻构成的测量电路输出微弱的 电压信号，电压信号经过精密放大电路完成调零和放大后送到A/D电路，再将模 拟信号变换成数字信号。单片机根据输入量和设定量进行模糊运算，输出二路开 关量。开关量控制制冷装置和加热装置，将温度控制在设定值。本文综合运用温 度传感器技术、数模转换技术、单片机技术、看门狗技术及抗干扰技术设计出一 套水浴箱控制系统，该系统在自动控制方面尤为突出：可以实现定时工作、量化 控温等智能化过程；同时由于使用了单片机控制，可以根据使用本产品单位的需 要，更改或升级写入芯片的控制程序，从而达到可持续应用和人性化设计的效果。 关键词：水浴，单片机，温度控制，电路设计 ABSTRACT This paper introduces hardware components, working principle and software design methods of temperature control system of water-box based on 89c51 SCM. PT 100 temperature sensors and precision measurement of the resistance constitute a circuit output voltage signal weak, after precision voltage signal amplifying circuit is completed and transferred to enlarge send A/D circuit, then transform analog signals into digital signals. SCM import volume and the volume set of fuzzy operation, the output volume of two-way switch. Switching Control refrigeration and heating devices and temperature control in the set value. In this paper, the integrated use of the temperature sensor technology、digital-to-analog converter technology、SCM technology、watchdog technology and antijamming technology design a set of bath box control system, the system of automatic control is particularly conspicuous : Timing can be achieved, quantified, such as intelligent temperature control process; Moreover, due to the use of SCM control, we can use this product units, change or upgrade chip into the control procedures, so as to achieve sustainable and humane application of the design results. KEY WORDS: bath, SCM, temperature control ,circuit design 目录 TOC \o 1-5 \h \z 摘要 I \o Current Document ABSTRACT II 前言 1 \o Current Document 第1章系统原理及性能 3 \o Current Document 1.1系统组成及原理 3 \o Current Document 1.2系统总体性能 3 第2章系统的整体设计方案 5 \o Current Document 2.1系统设计目标 5 \o Current Document 2.2系统设计原理 5 \o Current Document 3设计方案 5 第3章系统硬件设计 7 \o Current Document 3.1 PT100温度传感器 7 1. 1温度传感器介绍 7 1.2 PT100工作原理及其主要技术参数 8 \o Current Document 3.2测量电路 9