您现在所在的位置:首页 >> 单片机电子 >> 文章内容
基于单片机的液位检测系统的设计
双击自动滚屏 文章来源:   发布者:jsjlw99   发布时间:2013/3/19 1:06:01   阅读:2835
摘    要
随着现代化工业的发展,超声波液位检测技术已经获得越来越广泛的应用。超声波测距是一种非接触式检测技术,该技术把超声波能够定向发射以及良好的指向性能,与诸如微电子技术的电子技术相结合而完成。它能不受如光线、电磁波和尘埃等因素的影响,信息处理简单、成本底并且测量速度快。该技术在机器人与自动化应用,避障,车辆定位和导航,液位测量等中得到了广泛应用。
本文设计了一套超声波液位检测系统,该系统是一种基于AT89C51 单片机的超声波测距系统,它根据超声波在空气中传播的反射原理, 以超声波传感器为接口部件, 应用单片机技术和超声波在空气中的时间差来测量距离。测距系统主要由控制器模块、超声波发射模块、超声波接收检测模块、显示模块和温度补偿模块构成。AT89C51单片机的程序,使用Keil编译器进行设计和完成调试。在硬件电路中增加了温度补偿电路用于改善测量精度。AT89C51驱动传感器发出一个40kHz的方波信号,反射回来的超声波信号,经过放大和整形电路进入单片机,比较调试后确定其对应的距离,完成测距。这个数值通过液晶显示器实现实时显示功能。
本文介绍了超声波的特性及其测距原理、硬件电路原理、软件设计及可靠性设计。
 
关键词:超声波;液位检测;单片机; LCD显示单元

Abstract
With the development of modern industry, the ultrasonic detection technology has been increasingly and widely used. The ultrasonic Distance Measurement is a non-contact detection which is using a directional can be fired, point of the good features, combined with electronic technology such as micro-electronics technology to achieve. It can not be affected by factors such as light, electromagnetic waves and dust. The information processing is simple, low cost and fast. It’s widely used by robotic and automatic applications, the obstacle avoidance, vehicle positioning and the navigation, liquid level measurement and so on.
    This article introduces an ultrasonic liquid level detection system based on the AT89C51 MCU(Micro Controller Unit). According to ultrasound’s reflection principles of the dissemination in the air, the system uses the ultrasound sensor as interface components and the application of the distance measure based by MCU technology, the margin of time that ultrasound transmit in air, thereby make out the final test result. The system is mainly composed by the controller module, the ultrasonic transmission module, the ultrasonic reception examination module, the display module and temperature compensation module. The program of AT89C51 MCU is designed in keil and debugged by using keil compiler. The module of temperature compensation circuit has been added to hardware circuit to improve the precision. AT89C51 drive transducer sent a 40kHz square wave signal, the reflected signal enter the 51 after the enlargement and feedback circuit, and the system will complete the range finder by debugging the corresponding distance. The ranging value is real-time displayed through the LCD.
The article introduces the characteristic of ultrasonic, the ranging principle, the hardware circuitry, the software design and dependability design.
 
Key words: Ultrasonic;MCU;Distance Measurement;LCD Display Unit

[1] [2]  下一页


【 字体: 打印本页 | 关闭窗口
此论文全套为收费论文。要想获得此全套论文和设计请联系本站客服QQ:31600328 欢迎你的访问!
 上一篇文章:邮政企业治理问题研究
 本文的地址是: http://www.jsjlw99.cn/Articlenews.asp?id=3274  转载请注明出处!
 您的姓名:
 评论正文:
 验证码:  
 
 [@2022/10/2 17:28:46]
   
 [@2019/6/19 19:32:01]
   
 [@2019/6/6 13:37:07]
   
 [@2019/5/29 18:43:56]
   
 [@2019/5/10 2:49:35]
   
 [@2019/4/30 11:42:09]
   
 [@2017/7/17 4:33:07]
   
 [@2017/7/17 4:32:30]
   
本类最新文章
基于单片机的液位检测系统的设计 可调稳压电源 论文 单片机 扭矩测量&nb
单片机 数据采集&nb 单片机 温度采集&nb 单片机 迎客播报系统&
设为首页 | 收藏本站 | 过客留言 | 联系我们 | 友情链接 | 原创文章 | RSS订阅 | 管理入口

Copyright @ 2006-2008 Powered By 设计中心工作室  版权所有.
Email:31600328@qq.com QQ: 31600328
鄂ICP备05006890号 本站关键词:计算机毕业论文 计算机毕业设计