目录：

基于单片机的水温控制系统毕业设计

水温控制系统的XX

基于plc自动灌溉系统的设计

基于算法的毕业设计

基于单片机的水温控制系统毕业设计

1、INCLUDE“LCD1602H“INCLUDE“DS18B20H“VOIDMAININITWHILE1KEYSCANDISPLAYJIDIANQIIFNDEF_LCD1602_H_DEFINE_LCD1602_H_INCLUDEDEFINEUCHARUNSIGNEDCHARDEFINEUINTUNSIGNEDINTSBITLCDENP34/液晶使能端SBITLCDRSP35/液晶数据命令选择端VOIDWRITE_COMUCHARCOMVOIDWRITE_DATAUCHARDATEVOIDXIANSHIUCHARADD,UINTDATEVOIDINITENDIFINCLUDE“LCD1602H

2、“VOIDDELAYUINTZUINTX,YFORXZX0XFORY110Y0YVOIDWRITE_COMUCHARCOMLCDRS0P0COMDELAY5LCDEN1DELAY5LCDEN0VOIDWRITE_DATAUCHARDAXXXCDRS1P0DATEDELAY5LCDEN1DELAY5LCDEN0VOIDINITLCDEN0WRITE_COM0X38/设置16X2显示,5X7点阵,8位数据接口WRITE_COM0X0C/设置开显示，不显示光标WRITE_COM0X06/写一个字符后地址指针加1WRITE_COM0X01/显示清零，数据指针清零VOIDXIANSHIUCHARADD,

3、UINTDATEWRITE_COM0X800X40ADDWRITE_DATA0X30DATEIFNDEF_DS18B20_H_DEFINE_DS18B20_H_INCLUDEINCLUDE“LCD1602H“UINTGET_TEMPVOIDJIDIANQIEXTERNUCHARBSBITDSP22/温度传感器信号线SBITXXP20SBITK1P10SBITK2P11SBITKXX12SBITK4P13UCHARTEMPREADVOIDBITTEMPREADBITVOIDVOIDDSRESETVOIDVOIDDELAY1UINTZVOIDDISPLAYVOIDCHULIVOIDTEMPCHAN

4、GEVOIDVOIDTEMPWRITEBYTEUCHARDATVOIDKEYSCANVOIDJIDIANQIENDIFINCLUDE“DS18B20H“SBITRELAYP27UINTTEMP,T,NUM,Z,X,V,AFLOATF_TEMPUCHARWENDU4UCHARBVOIDDELAY1UINTZ/延时函数UINTX,YFORXZX0XFORY110Y0YVOIDDSRESETVOID/18B20复位，初始化函数UINTIDS0I103WHILEI0IDS1I4WHILEI0IBITTEMPREADBITVOID/读1位函数UINTIBITDATDS0I/I起延时作用DS1IIDATD

水温控制系统的XX

1、摘要:本设计完成基于单片机的模糊温度XXX的软硬件设计。本设计完成了将模糊控制与PID控制相结合方法用于工业温度控制领域，实现了对大滞后、慢时变、非线性的复杂系统的控制。在硬件方面，Fuzzy-PID温控器采用单片机作为控制核心，采用Pt100作为温度传感器，设计了温度测量转换电路，模/数转换器TLC2543实现温度数据采集。HD7279构成良好的人机接口模块，完成温度设定值的输入和温度数据实时显示。输出通道由D/A转换器和AD694芯片组成，将控制量转换为现场总线标准的电流信号4～20mA。在软件方面，本设计完成了并行Fuzzy-PID复合XXX的主流程图和各子流程图。编写的软件程序经过编译连接无误。

2、在设计过程中，采用Multisim软件对Pt100的测温电路进行了仿真，实现了温度采集精度的设计要求。本设计中的模糊PIDXXX，既具有模糊控制灵活、适应性强的优点，不依赖于控制对象有精确的数学模型，同时又具有控温精度高，动态性能好、受系统参数变化影响小的优点。

3、Abstract:This design has completed the design of software and hardware of the Fuzzy-PID temperature controller based on MCU. It has XXde the combination method of Fuzzy control and the PID control used in the industry temperature control doXXin, which has realized the control of complex system of long-time delay, slow time-variable, and the non-linear. In the hardware design, Fuzzy-PID temperature controller takes XXC as the core of the control, adopts Pt100 as the temperature sensor, and has designed the temperature signal measurement and convert circuit; ADC TLC2543 is used to finishi the temperature data gathering. The friendly XXn-XXchine inteXXXce module is composed of HD7279, which can carry on the functions of the input of the temperature setting value and the real time display of temperature data. The output channel is composed of DAC and AD694, which can convert the control quantity into fieldbus standard current signal 4~20mA. In the software design, this design has completed the XXin flow chart of the parallel Fuzzy-PID compound controller and each sub-flow chart. The procedure of software is uXXXXtakable after compilation and link.

4、In the design process, it adopts Multisim software to carry on the simulation of the Pt100 temperature signal measurement and convert circuit, and the design has met the requests of temperature measurement precision. The Fuzzy-PID controller in this design, not only has the characterics of flexibility and adaptability of Fuzzy control, which does not depend on the controlled object that has the precise XXtheXXtical model, but also has advantages of high precision temperature control, and the good dynXXic perforXXnce, which is affected little by the change of system parXXeters.

基于plc自动灌溉系统的设计

1、? ? 目前许多宾馆、厂矿、学校等企事业单位的浴室仍采用传统锅炉供热水，不仅能耗高，而且污染环境。随着太阳能技术的不断发展与进步，太阳能供热水技术应用越来越广泛，它不耗能、清洁环保，但存在着连续阴雨天或寒冷天气供热水效果差等缺点。

2、? ? ? ?PLC是工业自动化领域的三大支柱之一，在各类控制系统中得到了普遍的应用，它功能十分强大、性能稳定可靠、硬件装配接线及软件编程调试便捷高效 ]，为传统锅炉供热水系统的升级改造提供了可靠的保证。本文介绍利用太阳能、PLC技术对众多企事业单位传统锅炉供热水系统进行升级改造，基本保留原有的锅炉系统，引入太阳能供热水系统及PI C控制系统，改造花费成本较低，可使众多的宾馆、厂矿、学校等企事业单位的浴室在一般情况下使用太阳能供热水，在一些特殊天气气候条件下启动锅炉运作，使太阳能与锅炉供热水的良好配合，达到节能省钱、清洁环保、改造方便且成本低廉之目的。

基于算法的毕业设计

1、 如图13所示，此控制对象为锅炉温度。温度反馈信号使用的是PT100热电阻，通过AI808智能仪表把信号转化为4~20MAXX号送入XX331模块。程序结合FB43占空比控制功能块，把PID运算结果转化为PWM信号，由PLC输出PWM脉冲信号对交流接触器进行锅炉加热控制。监控显示为锅炉从25度加热到30度的状态。

2、 n=4 tr=116s tp=121s ts=144s σ=7% e(∞)=-0.147

3、 n=4 tr=110s tp=291s ts=321s σ=4% e(∞)=0.747

4、本实验装置如图117所示。此控制对象为单容水箱水位控制。装置使用压力传感器（1m=10KPA）把水位反馈信号（4~20XX)传至PLC XX331模块。PLC中通过PID运算，由XX332模块把PID运算结果转换为对应的4~20XXXX号传送给电动调节阀，从而通