水温自动控制系统-朱琳.doc

水温自动控制系统 朱琳，控制科学与工程学院 摘 要 本文设计了一个基于LPC2103单片机控制的水温控制系统, 由下位机、上位机、和通讯网络三部分组成。下位机是基于单片机LPC2103和温度传感器DS18B20的高精度数据采集系统，功能是对温度的检测与输出控制。上位机采用计算机，温度检测单元和可控硅调功控温单元是本文的设计重点。 温度检测单元，根据设计指标的要求我们选择了温度传感器DS18B20，实现温度采集.输出控制单元是通过对加热电阻丝的电源通断来实现的，采用可控硅（晶闸管）调功方式。通过MOC301光耦过零触发器实现对功率晶闸管的过零触发，从而实现对被控对象（如）的PID温度调节。 LPC2103； 温度传感器DS18B20； 温度检测； PID温度调节； 可控硅（晶闸管）调功；Water Temperature Controlling System ABSTRACT The paper main designs a brainpower controlling system of water temperature based on the microcontroller LPC2103 ，It consists of up a machine, bottom machine,and communication network. Bottom a machine is a high accuracy data collection system that bases on the microcontroller LPC2103 and the temperature sensor DS18B20 system. Its function is to temperature and output the control. The up a machine is a PC. with the bottom a machine proceeding data information hands over with each other, combine each road of manifestation temperature value and its curve, control parameter, initial value...etc.。Among them, The units of the temperature examination and the regulating power of the can-controlled silicon are the points of this design. For the temperature examination unit ,Consider of the index request of the design, we choosing the the temperature sensor DS18B20 to realize temperature collection. The output controlled unit is achieved by turn-on and turn-off of the power supply of the heated resistance wire, and adopt the regulating power of the can-controlled silicon. via photoelectricity coupling by-zero trigger MOC3061,it can actualize by-zero touch-off to power thyristor, thereby actualize the PID thermoregulation of the under controller . Key Words: the microcontroller; LPC2103; the temperature sensor DS18B20; temperature examination; the PID thermoregulation;the regulating power of the can-controlled silicon; 1:前言 随着经济的快速发展，资源的消耗越来越大，所以从可持续发展战略和经济效益方面来说，节约能源很有必要。而水温控制系统伴随着我们日常生活和工业生产的过程中，我们生活中的热水器，水烧开了以后有许多时候我