基于PC104的实时质谱仪真空监测系统  

Real-time Vacuum Monitoring System for Mass Spectrometer Based on PC104

作　　者：王文锦[1] 严奉轩[1] 李芳[1] 凌大鹏[1] 孙喜堂[1] 

机构地区：[1]中国船舶重工集团公司第七一八研究所,河北邯郸056027

出　　处：《仪表技术与传感器》2015年第12期26-28,31,共4页Instrument Technique and Sensor

摘　　要：文中提出了一种基于PC104的实时质谱仪真空监测系统。该系统主要由高速模拟量采集、PIC32数据滤波处理、实时抗干扰通信机制3项关键技术组成。高速A/D采集芯片对需要监测的外界物理量进行A/D转换后,根据A/D信号随机误差的特点,并兼顾系统的实时性,采用滑动平均滤波算法进行降噪处理。与上位机通信交互过程中,使用抵御通信差错的状态转移机制,保证传输的可靠性。实验结果表明,该系统在具备良好实时性和低功耗的前提下,滤波处理后真空度和温度测量数据的噪声指数分别降低了58.4%和60.2%,满足在恶劣现场环境中进行实时监测的需求。This paper presents a real-time vacuum monitoring system for mass spectrometer based on PC104. This system mainly consists of high-speed analog signal acquisition,data filtering based on PIC32,and real-time anti-jamming communication technology. A high-speed A / D converter was employed to acquire external physical quantities that are to be monitored. According to the characteristics of A / D signal＇s random disturbance,a moving average filter was used to reduce noise while giving consideration of the real-time request of the system. Afterwards,an error-resilient status transfer mechanism was proposed during communication with the upper computer to guarantee transmission reliability. Experimental results show that while possessing good real-time capability and low power consumption,the noise factors of the vacuum and temperature measuring data processed by our filtering algorithm are decreased by 58. 4% and 60. 2% respectively. Hence,the proposed system satisfies the requirements of real-time monitoring in harsh field condition.

关 键 词：PC104 PIC32 质谱仪 信号监测 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]