摘要
根据电磁感应特性中的涡流检测原理,设计了一套电磁感应式水质检测系统,该系统根据电磁感应测量技术设计了系统激励-检测线圈测量模型;以Arduino为核心处理器,利用数字频率合成技术(DDS)产生正弦激励源,基于鉴相芯片AD8302设计了相位检测器;并对系统中的信号进行处理(滤波、放大)增加系统的可靠性;通过串口和液晶显示实现人机交互界面显示磁感应信号检测数据。最后,通过对不同种类的水样本实验,实验结果表明该磁感应式水质检测系统,可以测量出水样本的电导率差异,判别出水质的类别。
According to the eddy current testing principle of electromagnetic induction characteristics,this paper designs a set of electromagnetic induction water quality monitoring system.According to the electromagnetic induction measuring technical to design system excitation-detection coil measurement model,the system is in the Arduino core processor,using digital frequency synthesis（DDS）to create sinusoidal excitation source and then based on the phase AD8302 chip to design the phase detector.And processing a signal of system（filtering,amplification）to increase system reliability,through the serial port and LCD display to achieve human-machine interface to show magnetic induction signal detection data.Finally,through testing the different types of water samples,the results show that the magnetic induction water quality monitoring system can measure conductivity differences in the water samples as well as determine the water quality categories.
出处
《国外电子测量技术》
2016年第2期70-76,共7页
Foreign Electronic Measurement Technology
基金
国家自然科学家基金(51377109)
辽宁省教育厅重点实验室基础研究项目(LZ2014011)支持
关键词
涡流检测
正弦激励源
相位检测
电导率
eddy current testing
sinusoidal excitation source
phase detector
conductivity
