基于STM32的水质COD检测系统设计与实现

基于STM32的水质C0D检测系统设计与实现摘要：我们从COD调查方法和仪器的前沿研究出发，提出了一种单片机和电化学相结合的调查方法，实现了温湿度和水质数据检测。包括数据的快速自动监控与管理，解决由于水质污染设备不足尴尬的局面，主要工作包括：根据背景提出方案，提供了一款单片机结合电化学高速测试的便携式化学需氧量高速测试设备，在研究国外COD测试仪技术状况的基础上，针对用户要求加以研发。水样采集器、恒电位测量、空气湿度监测、LCD显示屏、GPRS和Wi-Fi通信模块均连接到主要的测控芯片，以STM32F四芯片为内核，通过对职能模块进行集中管理，并搭建平台实现COD快速测试系统硬件。系统末的座机应用软件一般包括操作系统主程序，还包括了操作系统的初始化、RTC时钟、COD信息收集、温湿度传感器信息收集、通讯输入等子程序；测定已知道含量的溶液的COD(化学需氧量)数值。结果表明，COD含量越低，测定差值越大，和标准的差距不超过4%，准确的数值准度高于国家标准GB11914-89规定的数值。关键词：化学需氧量：C0D:STM32;电化学；实时检测Design and implementation of Waterquality COD testing system based onSTM32Abstract Starting from the cutting-edge research of COD investigation methods andinstruments,we propose a single-chip microcomputer and electrochemical investigationmethod to realize the detection of temperature,humidity and water quality data.Includingthe rapid automatic monitoring and management of data,to solve the embarrassingsituation due to insufficient water pollution equipment,the main work includes:accordingto the background to propose a scheme,provide a single-chip microcomputer combinedwith electrochemical high-speed test of portable chemical oxygen demand high-speed testequipment,on the basis of studying the technical status of foreign COD testers,accordingto user requirements to develop.Water sample collector,potentiostat measurement,airhumidity monitoring,LCD display,GPRS and Wi-Fi communication modules are allconnected to the main measurement and control chips,with STM32F four chips as the core,through the centralized management of functional modules,and build a platform to realizeCOD rapid test system hardware.The landline application software at the end of thesystem generally includes the main program of the operating system,and also includessubprograms such as the initialization of the operating system,RTC clock,CODinformation collection,temperature and humidity sensor information collection,andcommunication input;Measure the COD (Chemical Oxygen Demand)value of a solutionwith known content.The results show that the lower the COD content,the larger themeasurement difference,the gap with the standard does not exceed 4%,and the accuratenumerical accuracy is higher than the value specified in the national standardGB11914-89.Keywords:Chemical oxygen demand;Real-time detection;Electrochemistry;STM32父目录第1章绪论1.1课题研究背景与意义…1.2研究现状与趋势分析.11.2.1COD检测仪器国内外研究现状21.2.2目前存在的问题.41.2.3未来趋势分析.51.3课题主要研究内容.6第2章COD检测系统总体方案设计.72.1系统功能分析及总体方案设计72.1.1系统功能分析.…2.1.2总体方案设计..82.2C0D检测模块方案设计..82.2.1检测方法选择.82.2.2检测方案设计….92.3各模块方案设计112.3.1水样采集模块。112.3.2通讯模块.122.3.3电源模块..132.4检测模块结构设计142.5工作流程设计.….152.6本章小结.…16第3章COD检测系统硬件设计173.1STM32硬件系统整体设计…173.1.1硬件系统整体架构173.1.2STM32主控制芯片选择18III