毕业设计（论文）-基于数字电路的液位控制电路的设计与制作.doc

基于数字电路的液位控制电路的设计与制作
姓名:
指导教师:
系别: 电子电气工程系
专业: 应用电子技术
长沙航空职业技术学院
2012年4月
摘要
本文设计的基于单片机的液位监控系统是一种利用超声波技术、电子技术、电磁开关技术相结合来实现非接触式液位测量和控制系统,能够在某些特定场合或环境比较恶劣的情况下使用,在工业监测和控制等方面得到了广泛应用。近些年来,工业水平的不断发展对液位测量的精度、广度和抗干扰性提出了越来越高的要求,超声波测距技术本身也在不断的完善和发展,测距仪更趋向小型化和智能化,逐步实现了高精确度、高可靠性、安全性和多功能化。
本设计的主要任务是以单片机为主控制器,开发一个基于单片机的液位监控系统,可测量并显示液位,还可以通过单片机控制把液位限定在某一范围内,在单片机控制失效的情况下发出报警信号,提醒工作人员进行手动控制。研究内容包括超声波测距的基本原理与方法、精度影响因素的分析与解决办法、单片机对阀门的控制方法、监控系统的整体方案设计、硬件设计、软件流程设计等。设计完成之后提供一套可以使用的超声波测距仪,测量范围和测量精度满足一般工业应用需要。设计完成之后应提供一套可以用于一般工业生产的液位监控系统。通过毕业设计的整个过程,可以综合运用传感器、单片机、电子电路和程序设计方面的知识,锻炼和提高动手能力、参与科研工作的能力。
关键词:单片机超声波测距液位监控
Abstract
The monolithic machine-based liquid place supervisory control system the main body of a book is designed has been that one kind of the contact-type liquid making use of the ultrasonic technology , electron technology , ism switch technology to bining ing each other place measures and controls system , has been able to be put into use under some specially appointed occasion or environment paratively very bad situation , has got extensive use in the field of industry monitoring and controlling and so on. Horizontal uninterrupted growth of industry has brought forward the more and more high request to accuracy , extent and anti-interference sex that the liquid place measures in recent year, self can't be in the ultrasonic distance measurement technology perfect ceaseless and developed, the range finder is incline to minaturized and intellectualized , step by step have realized high precision , high reliability , security and multifunctional-rization.
This design's primary mission is by the monolithic integrated circuit primarily controller, develops one based on monolithic integrated circuit's fluid position supervisory system, measurable quantity and disclosing solution position, but may also through the monolithic integrated circuit control the fluid position define that in some scope, the situation which expires in the monolithic integrated circuit control