氮存在于水中的方式有氨氮、有机氮、亚硝酸盐氮、硝酸盐氮，四种不同形 式的化合物在特定条件下时他们之间可以相互转化。水质中氨氮的含量的激增的 主要原因为生活产生的污水、农田灌溉的农药排水、工业化工生产的废水等。水 质中氮含量过高时对人身体的健康以及生活在其中的水生生物都有相当大的毒 害作用。72262

本文在简单介绍了水质氨氮检测的原理上，设计了一种快速而又高效的氨氮 传感器。氨氮传感器的硬件部分以单片机 C8051F350 作为核心部件，外围电路 按键复位电路和晶振电路、存储器电路以及串行通信电路，用氨气敏传感器、pH 传感器以及温度传感器作为数据采集部分，将采集到的氨气值、pH 值和温度值 经过放大滤波等处理送入单片机进行 A/D 转换，同时单片机利用存储器中与三 者相关的参数根据三者之间的关系计算出最终水质中氨氮的含量。最后将水质中 总的氨氮含量经过串口送入上位机进行数据的显示与保存等工作。

该论文有图 22 幅，表 5 个，参考文献 30 篇

毕业论文关键词：氨氮测量 电极法 NH3/T/pH 三探头 单片机

The Design of Intelligent Ammonia Sensor

Nitrogen present in water methods are ammonia, organic nitrogen (organic nitrogen including urea, proteins, amines, amino, nitro compounds and nitrile compounds, etc。), nitrite nitrogen, nitrate nitrogen, four different forms of a particular compound when conditions interconvertible between them。 The main reason for the surge in ammonia content in the water quality of the lives of sewage, pesticides, irrigation and drainage, the legacy of industrial chemical production waste, such as coking reactions of residual waste and ammonia wastewater。 In which aquatic organisms have a considerable toxic effects on the human body's health and quality of life when the nitrogen content is too high。 

In this paper, a brief introduction on water quality ammonia detection principle, design a fast and efficient ammonia sensor。 The hardware part of the ammonia sensor C8051F350 microcontroller as a core component, the peripheral circuit button reset circuit and crystal oscillator circuit, a memory circuit, and a serial communication circuit using ammonia-sensitive sensor, pH sensor and a temperature  sensor as  the data collection, the collected ammonia gas value, pH and temperature values after amplification and filtering process into the microcontroller a / D conversion, and the use of single-chip memory and three related parameters according to the relationship among calculate the final content of ammonia in water quality。 Finally, the water quality of the total ammonia content sent through the serial port of the host computer for data such as display and save your work。

Key  Words:  Measurement  of Ammonia electrode NH3  /  T /  pH  Three  – head MCU

目录

摘要 I

Abstract II

1 绪论 1

1。1 课题综述及研究意义 1

1。2 课题研究现状 1

1。3 课题研究主要内容、实施方案及创新点 2

2 整体方案设计 4

2。1 系统构成 4

2。2 系统原理 5

3 氨氮传感器的硬件设计