基于单片机的加药自动控制电路的设计论文-（毕业论文设计）.doc

PAGE PAGE I 摘要 加药自动控制电路的设计对早前的加药控制器进行了改进，之前的加药控制器需要人工的监测，加药自动控制电路的设计免去了这种既耗时间又耗经济的弊端。本设计是在基于单片机的基础上实现自动控制，在单片机最小系统，检测电路模块，电源电路模块，报警电路模块,ADC0804模数转换电路模块，显示电路模块和软件编程的基础上来实现药水水位的自动控制。文章结合了1602，蜂鸣器，STC89C52，ADC0804模数转换器，水位传感器等的使用方法，水位传感器是根据内部阻值感应水位高低而改变，继而在整体的电路中产生电压的变化并在LCD上显示电压的变化，功能模块通过水位传感器检测水位高低得到电压的不同值，然后再通过模数转换器把由于水位高低的不同而引起的电压不同值转换成数字信号输入给单片机，单片机在做出相应的处理从而达到设计要求的自动检测水位功能。实践表明，此设计有良好的应用前景。 关键词：自动控制；单片机；Altium Designer；LCD1602；ADC0804 Abstract This design of Dosing Automatic Control Circuit has refined the previous Dosing Controller which needs artificial monitoring. And the new design of Dosing Automatic Control Circuit has successfully avoided the disadvantages of wasting time and money . This design is based on Single Chip Microcomputer to achieve the automatic control and realize the automatic control of liquid medicine’ water level through the minimum SCM system, detection circuit module, power circuit module, alarm circuit module, ADC0804 analog digital conversion circuit module, display circuit module and software programming. This article has combined with application methods of 1602 Liquid Crystal Display, buzzer,STC89C52, ADC0804 analog digital converter and water level sensor which varies with internal resistance induction of water level and causes changes of the whole circuit’s voltage accordingly, then makes it showed in the LCD . Afterwards, through the different voltage values inducted by water level sensor which soon will be converted into digital signals by the analog digital convertor, the function module then inputs the digital signals into the SCM. And the SCM makes corresponding processing, thus meets the design requirements for automatic function of detecting water level. Practice shows that this design has a good application prospect. Key Words: automatic control; single chip microcomputer; altium designer; 1602 liquid crystal display; ADC0804 analog digital converter 目录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc324673232 摘要 PAGER