一种小型取样分析控制系统的设计与实现  

Design and Implementation of Small Control System forGas Sampling and Analysis

作　　者：李乐斌[1] 张宾永 武超 刘艳[1] 任英[1] LI Le-bin;ZHANG Bin-yong;WU Chao;LIU Yan;REN Ying(China Institute of Atomic Energy)

机构地区：[1]中国原子能科学研究院

出　　处：《化工自动化及仪表》2022年第2期157-161,共5页Control and Instruments in Chemical Industry

基　　金：国家重点研发计划项目(2017YFE0301506)。

摘　　要：在低浓度涉氢(及同位素)被污退役核设施的清洗过程中,用质谱分析清洗后气体样本已经无法被准确测量。因此,提出将气态样本转换为液态样本,用液闪谱仪做定量分析的方法,并且建立了模拟实验装置。根据工艺流程的具体要求,设计基于PLC的取样分析控制系统,该控制系统包括常规信号采集、温度PID控制,串口RS232、RS485通信及OPC通信等,实现了参数设定、数据处理、数据显示与存储等功能。实验结果表明:该取样分析控制系统运行稳定可靠,操作界面友好简单且便于维护,实用性强。In process of cleaning nuclear facilities contaminated by low-concentration hydrogen(and isotope),the washed gas samples can’t be accurately measured by mass spectrometry.In this paper,a method of employing liquid scintillation spectrometer to quantitatively analyze liquid samples converted from the gaseous samples was proposed and its simulation experiment set was established.According to the specific requirements of the process,a PLC-based control system for sampling analysis was designed,in which,the conventional signal acquisition,temperature PID control,serial port RS232,RS485 communication and OPC communication are included to realize functions of parameter setting,data processing,data display and storage.The experimental results show that,this sampling analysis control system runs stably and reliably along with friendly and simple operation interface,easy maintenance and strong practicability.

关 键 词：取样分析控制系统 退役核设施治理 定量分析 PLC 硬件 软件 

分 类 号：TP214[自动化与计算机技术—检测技术与自动化装置] TL341[自动化与计算机技术—控制科学与工程]