多通道原位营养盐监测系统设计  

Design of multi-channel in-situ monitoring system for nutrient salt

作　　者：刘杰 刘岩 曹煊 马然 张述伟 LIU Jie;LIU Yan;CAO Xuan;MA Ran;ZHANG Shuwei(Shandong Provincial Key Laboratory of Ocean Environmental Monitoring Technology,SAS Institute of Oceanographic Instrumentation,Qilu University of Technology,Qingdao 266001,China)

机构地区：[1]齐鲁工业大学(山东省科学院)山东省科学院海洋仪器仪表研究所山东省海洋环境监测技术重点实验室

出　　处：《现代电子技术》2020年第2期87-89,96,共4页Modern Electronics Technique

基　　金：国家重点研发计划（2016YFC1400800）;山东省自然科学基金重大基础研究项目(ZR2018ZB0523)

摘　　要：现有的营养盐监测体系一般为单通道回路,且测样流程耗时大,回路之间存在污染,严重影响了传感器的工作效率和准确度。为此,在现有监测体系的基础上设计一种以高级单片机STM32F401为控制核心的多通道原位营养盐监测系统。该系统整体基于微流控芯片技术的流路体系,采用模拟锁相放大电路+变步长LMS(最小均方算法)自适应滤波算法用于微弱信号的检测提取,最终实现海水营养盐的多通道原位实时监测。长期的试验数据表明,该多通道原位监测系统对于提高营养盐监测效率和准确度具有非常重要的意义。In the existing nutrient salt monitoring system,the single channel loop is adopted in general,which may result in great time consumption and pollution between the loops in the process of the sample detection,and seriously influences the working efficiency and accuracy on the sensor.Therefore,a multi⁃channel in⁃situ nutrient salt monitoring system taking STM32F401 as the control core is designed based on the existing monitoring system.On the basis of the flow path system of the micro⁃fluidic chip technology,the analog phase⁃locked amplification circuit plus variable step size LMS adaptive filtering algorithm is used in the system for the detection and extraction of weak signals,so as to realize the multi⁃channel in⁃situ monitoring of seawater nutrient salt in real time.The long⁃term experimental data show that the multi⁃channel in⁃situ nutrient salt monitoring system is of great significance for improving the efficiency and accuracy of nutrient salt monitoring.

关 键 词：营养盐原位监测 多通道回路 实时监测 微流控芯片技术 微弱信号提取 数据分析 

分 类 号：TN911.23-34[电子电信—通信与信息系统] TP391.8[电子电信—信息与通信工程]