淡水污染分析仪单片机毕业设计10

摘  要 近年来水污染问题越来越严重，生产和生活排出的大量污水含有诸多有害因素，严重地危害人类的健康。因此，对水质的检测和控制显得极其重要。但是传统的经验检测法已经不能满足需要，有时甚至会带来巨大损失；化学检测法过程复杂、不具有实时性，还会带来二次污染；现代仪器检测法是水质检测的最新方法，它通过相关传感器，将被测对象的化学量或物理量转化为电信号，经高增益放大器放大、数字化处理后，输入到MCU后准确得到测量参数。 对于湖泊和河流水质的测量，如果将浮标常年位于水中，为它架设专门的通信线路显得不合适；本文研究了一种便携式水质监测装置，它能够检测被测水体的电导率，和温度等参数，并在数码管上显示出来。根据被测水体的电导率和温度值来反映水体的污染程度，同时在数码管的尾部连接一个蜂鸣报警器，当被测水体的污染程度超过一定上限时，报警器会发出报警声。本系统设计可靠，具有一定的实用价值。   关键字： 水质检测，电导率，污水检测   Abstract In recent years the water pollution problem more and more serious, the living and production of sewage discharge containing many harmful factors, severely harm human health. Therefore, the water quality inspection and control is very important. However, the traditional experience assay have cannot meet the requirements, sometimes even bring tremendous loss; Chemical assay process is complicated, do not have real-time, still can bring secondary pollution; Modern instruments test is the latest methods of water quality inspection by relevant sensors, and it tested object chemical quantities or physical electrical signal is transformed by high power gain amplifier amplification, and digital processing, after input to get accurate measuring parameters of MCU. The water quality in lakes and rivers, if will buoy measure for it in the water, perennial erect special communication lines appear not appropriate; This paper studies a portable water quality monitoring device, it can detect the water being measured parameters such as conductivity and temperature in the digital tube, and displayed. According to the measured water temperature of conductivity and to reflect the extent of the pollution and water in the digital tube tail connected a buzz alarm, when measured by water pollution levels on the above a certain level, alarm will sound alarm. This system design and reliable, has certain practical value.       Key word:  water quality inspection, conductivity, sewage detection       目录 摘  要... 1 Abstract 2 一、系统概述... 4 二、系统整体方案设计... 5 2.1传感器的选型... 5 2.2 电导率的概念及计算... 5 2.2.1 电导率的概念... 5 2.2.2 电导率的计算方法... 6 2.3 主控器51单片机介绍... 7 2.4 24位A/D转换器LTC2400. 14 2.5显示电路... 15 2-6 DS18B20介绍及其应用... 17 三、系统软件分析... 19 3.1 电导测量值的温度补偿... 19 3.2  系统软件分析... 20 结束语... 21 致   谢... 22 参考文献... 23 附录一、整体电路图... 24 附录二、硬件PCB图... 25 [资料来源：http://think58.com]

[来源：http://think58.com]