面向海洋环境的溶解氧检测系统及有效性审核模型研究

发布时间：2017-12-28 18:04

本文关键词：面向海洋环境的溶解氧检测系统及有效性审核模型研究　出处：《浙江工业大学》2015年硕士论文　论文类型：学位论文

【摘要】：溶解氧是溶解在水中的分子态氧,通常记作DO,是进行水下科研测量的重要参数。随着我国水资源保护、水产养殖业和海洋科学的发展,如何快捷精确地测定海洋中溶解氧的含量越来越受到人们的关注,对溶解氧的现场实时监测仪器的需求将会越来越大。溶解氧测量常用方法在用于实时在线测量有各自的优点和缺点,本文选用Clark电极法并在此基础上对其进行改进,使得测量结果更准确更可靠,能够满足长期实时在线测量的要求。本文的主要工作和成果如下:第一章介绍了溶解氧测量的背景情况以及国内外的研究现状,介绍了溶解氧测量的常用方法,对溶解氧测量的常用方法综合考虑后选用了Clark电极法作为本文溶解氧测量的主要方法。第二章首先对数据融合技术进行了简单的概述,然后对溶解氧测量有影响的温度、压力和盐度三个辅助参数进行了分析,并对溶解氧的测量进行了温度、压力和盐度三个参数的补偿来提高溶解氧参数测量的精度;然后对溶解氧的三个辅助参数运用D-S证据理论建立了有效性审核模型。第三章以LPC1768为核心设计了溶解氧检测系统的硬件系统,硬件系统分为处理器模块、多传感器模块、通信模块和电源管理模块,分别进行了各个模块的电路设计。第四章根据设计的硬件系统,对照各模块进行功能模块上的软件设计。第五章对溶解氧检测系统进行测试,分析实验结果,实验结果表明溶解氧传感器的精度为±0.1mg/L,相对误差为1%,数据融合的结果表明有效性审核模型有待进一步的完善。
[Abstract]:Dissolved oxygen is a molecular oxygen dissolved in water. It is usually recorded as DO and is an important parameter for underwater scientific research and measurement. With the development of water resources protection, aquaculture and Marine Science in China, more and more attention has been paid to the rapid and accurate determination of dissolved oxygen in the ocean. The demand for real-time monitoring instruments for dissolved oxygen will increase. The commonly used methods of dissolved oxygen measurement have their own advantages and disadvantages in real-time online measurement. In this paper, Clark electrode method is applied and improved on this basis, so that the measurement results are more accurate and reliable, which can meet the long-term online real-time measurement requirements. The main work and achievements are as follows: the first chapter introduces the research background of the measurement of dissolved oxygen at home and abroad, introduces the common method for the measurement of dissolved oxygen, the commonly used method for the measurement of dissolved oxygen after considering using Clark electrode method as the main method in the measurement of dissolved oxygen. The second chapter gives a brief overview of the data fusion technology, and then affect the measurement of dissolved oxygen temperature, pressure and salinity of three auxiliary parameters were analyzed, in order to improve the dissolved oxygen parameters measurement accuracy and measurement of dissolved oxygen were temperature, pressure and salinity of three parameters on the dissolution and compensation; oxygen three auxiliary parameters using D-S evidence theory to establish the validity of the audit model. The third chapter designs the hardware system of dissolved oxygen detection system based on LPC1768. The hardware system is divided into processor module, multi-sensor module, communication module and power management module, and the circuit design of each module is carried out separately. The fourth chapter is based on the design of the hardware system, and the software design of the functional modules is carried out against each module. The fifth chapter tests the dissolved oxygen detection system and analyzes the experimental results. The experimental results show that the accuracy of the dissolved oxygen sensor is + 0.1mg/L and the relative error is 1%. The result of data fusion indicates that the validity audit model needs further improvement.
【学位授予单位】：浙江工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P716.5

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