离子迁移谱仪的温度与流量控制系统设计与实现  

Design and implementation of temperature and flow control system for ion mobility spectrometer

作　　者：刘伟豪[1] 陈勇[1] 沈俊[1] 郑健[1] 

机构地区：[1]公安部第三研究所,上海200235

出　　处：《工业仪表与自动化装置》2016年第2期34-38,67,共6页Industrial Instrumentation & Automation

基　　金：科技部科研院所技术开发研究专项资金项目(2011EG153314)

摘　　要：离子迁移谱检测仪通过分析不同物质的迁移率实现对被检物的鉴别,而物质的迁移率与温度、气压、电场条件密切相关,因此仪器在工作过程中需要对温度和气体流量等参数进行精确地实时控制。针对嵌入式离子迁移谱仪的应用要求,在ARM+嵌入式Linux系统架构下,利用ARM处理器的PWM功能,并对传统PID控制算法进行改进,设计了一种基于ARM的多路温度和流量控制系统,可以实现对温度及流量的快速而精确的实时控制,结构简单、可靠性高。The ion mobility spectrometer（ IMS） detector to achieve identification of the subject matter by analyzing the mobility of different substances,but the mobility of the material is closely related to temperature,air pressure and electric field condition. Therefore,it is necessary to control the temperature and gas flow accurately in the work process of the instrument. Based on application requirements of the embedded ion mobility spectrometer. This paper using ARM processors PWM function and improving the traditional PID control algorithm,a multi-channel temperature and flow control system in ARM ＋ embedded Linux system architecture based on ARM function is designed. It can achieve fast and accurate control of the temperature and flow rate,and simple structure,high reliability.

关 键 词：离子迁移谱 PID控制算法 PWM 嵌入式系统 

分 类 号：TP332.1[自动化与计算机技术—计算机系统结构]