基于虚拟仪器的远程控制砷/氟离子自动检测系统

Arsenic/Fluoride Ion Automatically Detecting System Based on Virtual Instrument[JZ)][HS)]

摘要:

叙述了一种基于虚拟仪器的远程控制砷、氟离子自动检测系统设计,主要介绍了仪器的整体技术路线、液体自动进样、采集电路、控制软件以及信号处理；当待测水环境中的砷、氟含量发生变化时,仪器通过三电极方法全自动的检测出电流变化,然后通过基于小波分析的信号去噪分析方法和峰面积计算方法计算出相应的离子浓度；实验结果表明,氟含量检测指标为最小分辨为0.2 ppm,检测范围是0.2~50 ppm；砷含量检测指标为最小分辨为0.1 ppb,检测范围是1~500 ppb；检测系统能够实现无人值守和远程无线控制,使饮用水中有害离子的现场实时快速监测成为可能。

Abstract:

An approach remote control arsenic fluoride ion automatic detection system based on Labview was described, the article mainly introduce the overall technical route, liquid instrument automatic sampling, sampling circuit, control software and signal processing. When the measured arsenic, fluoride content in water environment changes, the three electrode method to detect the automatic current changes, and then through the noise analysis method and the peak signal based on wavelet analysis area calculation method to calculate the ion concentration of the corresponding. The experimental results indicate the index of fluorine content minimum resolution is 0.2ppm, the detection range is 0.2~50ppm; detection index for arsenic minimum resolution is 0.1ppb, the detection range is 1~500ppb. The instrument is possible for detecting harmful ions in drinking water on-site monitoring of real-time.