多参数水质检测仪测控系统优化设计与实验

发布时间：2018-03-09 14:57

本文选题：树莓派　切入点：多参数水质检测仪　出处：《重庆大学》2015年硕士论文　论文类型：学位论文

【摘要】：水质检测是水资源保护与治理的必要手段,多参数水质检测是近年来水质检测装备发展的重要方向之一。多参数水质检测仪的测控系统设计是实现仪器智能化、自动化、网络化的核心技术,是保障仪器稳定运行和自动化测量的关键,具有重要的实用化意义。论文针对重庆大学微系统中心前期研制的多参数水质检测仪测控系统存在的不足,在分析该多参数水质检测仪的结构和工作原理基础上,结合当前水质检测仪器发展趋势,提出了以树莓派为控制核心的多参数水质检测仪测控系统升级方案,完成了测控系统样品反应检测模块、光学模块、顺序进样模块、设备自监测模块、电源管理模块、树莓派嵌入式控制平台等的软硬件设计;完成了测控主板的系统设计、制板、调试;搭建了仪器测试平台,完成了测控系统各个功能模块的调试,进行了仪器流路系统清洗、六价铬浓度测试等相关实验,实验结果表明,以树莓派为控制核心的多参数水质检测仪测控系统具有较强的可拓展性、稳定性和可靠性,完全满足仪器实用化需求。论文主要研究内容:①研究分析了水质检测仪器国内外研究现状,分析了实验室前期研制的多参数水质检测仪测控系统存在的不足,结合水质检测仪器发展趋势,确定了测控系统总体优化升级方案;②在了解多参数水质检测仪的结构和工作原理基础上,详细地分析了原仪器测控系统各功能模块存在的问题,优化了样品反应检测模块、光学模块、顺序进样模块的不合理设计,提出了嵌入式控制平台和设备自监测模块的具体优化方案;③完成了测控系统各功能模块设计,实现了样品反应检测模块气泡搅拌、清洗、恒温、排废等功能,增加了气泡搅拌力度切换功能,实现了进样模块控制,完成了设备自监测模块硬件设计,实现了泄漏实时监测、断电保护、温度实时监测等功能;④完成了基于树莓派的嵌入式控制平台搭建(包括开发环境建立、wiring Pi集成库开发、触摸屏扩展、远程控制等),通过树莓派板载GPIO、USB、I2C等接口实现了对测控系统硬件资源的控制;⑤完成了测控系统主板调试,搭建了仪器测控平台,完成了对测控系统各个模块的联合调试,开展了流路系统清洗实验和六价铬浓度测试实验。
[Abstract]:Water quality detection is a necessary means for water resources protection and management, and multi-parameter water quality detection is one of the important directions in the development of water quality inspection equipment in recent years. The design of measuring and controlling system of multi-parameter water quality detection instrument is to realize the intelligent and automatic instrument. The core technology of the network is the key to ensure the stable operation of the instrument and the automatic measurement, and has important practical significance. The paper aims at the shortcomings of the multi-parameter water quality measuring and controlling system developed by the micro-system center of Chongqing University in the early stage. On the basis of analyzing the structure and working principle of the multi-parameter water quality detector, combined with the development trend of the current water quality detection instrument, a scheme of upgrading the measuring and controlling system of the multi-parameter water quality detector with raspberry pie as the control core is put forward. The hardware and software design of sample response detection module, optical module, sequential sampling module, equipment self-monitoring module, power management module, raspberry pie embedded control platform and so on are completed. The instrument testing platform was built, the debugging of each functional module of the measurement and control system was completed, and the relevant experiments such as cleaning the instrument flow path system and testing the concentration of hexavalent chromium were carried out. The experimental results show that, The measurement and control system of multi-parameter water quality detector with raspberry pie as the control core has strong expansibility, stability and reliability. The main research content of this paper is: 1. The current research situation of water quality testing instruments at home and abroad is analyzed, and the shortcomings of the multi-parameter water quality measurement and control system developed in the early stage of laboratory are analyzed. According to the development trend of water quality testing instruments, the overall optimization and upgrading scheme of measurement and control system is determined. On the basis of understanding the structure and working principle of the multi-parameter water quality detection instrument, the problems existing in each functional module of the original instrument measuring and controlling system are analyzed in detail. The unreasonable design of sample response detection module, optical module and sequential sampling module is optimized. The specific optimization scheme of embedded control platform and equipment self-monitoring module is put forward. The function modules of the measurement and control system are designed. The functions of bubble stirring, cleaning, constant temperature and waste removal of sample reaction detection module are realized, the switching function of bubble stirring force is added, the control of sample injection module is realized, the hardware design of equipment self-monitoring module is completed, and the leakage real-time monitoring is realized. Power failure protection, real-time temperature monitoring and other functions have completed the building of an embedded control platform based on raspberry pie, including the development of the development environment, the development of the integrated library of wiring Pi, the expansion of the touch screen, and the development of the embedded control platform based on raspberry pie. Remote control and so on, through the interface of Raspberry pie board GPIOO USBU I2C, the main board debugging of the measurement and control system hardware resources has been realized. The instrument measurement and control platform has been set up, and the joint debugging of each module of the measurement and control system has been completed. The flow system cleaning experiment and hexavalent chromium concentration test were carried out.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X853

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