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摘 要 目前，由于工业发展的问题，全球的水资源都遭到了不同的破坏，特别是发达国家。我国水资源虽然多，但是人均水资源极少，是极其缺水的国家。在这样的大环境下，本文利用STM32 设计了一个智能浑浊度检测仪，希望可以实现实时检测水资源的浑浊度。 本文主要论述了关于浊度仪的一些问题，首先是对浑浊度的概念进行了详细的解释，也阐述了浑浊度单位的由来以及变迁，然后对浑浊度仪的光学原理一一进行了分析，并最终选择了光的水下散射原理，而且还对该原理带来的非线性误差进行了补偿讨论。 接下来，本文交代了关于浑浊度仪的硬件设计方案，在此方案中本文介绍了水下传感器的光源和光电二极管的选择，还有信号放大滤波电路的设计和智能处理器的设计。 最后，本论文在硬件的基础上设计了适用于该硬件的各个模块软件，能够实现与 PC 机通信，显示的功能。 58971
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毕业论文关键词：浑浊度，水下散射，STM32，水下传感器
Abstract At present, the global water resources are damaged at different levels due to the problems of industrial development, especially in the developed countries. Although the water resources in our country are abundant, the per capacity water resources are very few, China is a country with a great shortage of water. Under such circumstances, this paper uses STM32 to design a smart turbiditimeter, hoping to realize the turbidity of water resources with real- time detection. This paper mainly discusses the problems about turbiditimeter. Firstly, this paper is making a detailed explanation of the concept of turbidity. It expounds the origin of turbidity unit and change, then the optical principles of turbidity meter are analyzed one by one, and ultimately chose the underwater light scattering principle. The principles of nonlinear error compensation are discussed. Secondly, this article narrates the hardware design scheme about turbiditmeter, the light source and the choice of the photo-diode are introduced in this scheme, as well as the design of underwater sensor and signal amplification filter circuit and intelligent processor. Finally, this paper is suitable for the various modules of software on the basis of the hardware design, the hardware can realize communication with a PC and display function.
Key words:Turbidity, Underwater scattering, STM32, Under water sensor
目录
第一章 绪论 1
1.1课题研究背景 1
1.2 浑浊度的概念.. 1
1.3 浑浊度仪的介绍. 3
1.4.1 国内外现状.. 4
1.4.2 发展趋势 5
第二章 浑浊度的测量 . 6
2.1 光学测量浑浊度的方法. 6
2.1.1 散射光测量法. 6
2.1.2 基于表面散射光测量方法.. 6
2.1.3 透射光测量法. 7
2.1.4 透射与散射光比较测量法.. 8
2.1.5 水下散射光测量法.. 8
2.2 浑浊度测量方法的选择. 9
2.3 本章小结.. 10
第三章 水下散射式测量的原理 12
3.1 水样对光的吸收与散射.. 12
3.1.1 光的吸收定理.. 12
3.1.2 光的散射定理.. 13
3.1.3 瑞利散射. 14
3.1.4 米氏散射. 15
3.1.5 入射光的入射角与散射光的散射角 . 15
3.2 测量的范围与非线性问题. 15
3.3 本章小结.. 16