高能X射线实时成像及固体线性阵列探测器技术研究项目中的软件开发

这是一个涉及多学科相关技术的项目,计算机数字成像是该项目中的一部分,即将前端设备送来的信号作相应处理,然后以数字成像的方法在计算机屏幕上显示出来。已实现的功能包括:实时控制系统的启动、停止,实时数据获取,探测器零点校正,探测器效率校正,实时成像,图像缩放,     

基于数字多道的建材放射性测量谱分析软件设计

基于Windows操作系统,利用Visual C 设计了"数字化建材天然放射性测量仪"的NaI γ谱分析软件StoneNaI.软件集成了最小二乘法、逆矩阵法和最小二乘-逆矩阵法三种解谱算法供用户选择;包含了谱修正功能;实现了基于USB 2.0接口的数据采集;谱数据的平滑、寻峰、能量刻度以及谱图的缩放、对数自然显示、点线显示等功能;具备建库解谱和快速解谱两种解谱方式,以满足不同测量对解谱的要求.     

三维重建技术在工业CT中的应用

用图像的三维重建技术,实现连续断层CT图像的三维可视化是近年来国内工业CT领域内的-个重要研究方向.用三角面片连接轮廓线方法,实现了连续等间隔工业CT图像的三维重建,获得了扫描物体的三维立体显示图像.通过计算机交互操作,实现多角度、多方位观察物体,无损测量物体三维参数等功能.利用重建出的三维图像,检测人员可以获得物体更多的空间结构信息,从而提高无损检测的方便性和准确性.     

基于PLC的直线加速器联锁保护系统

介绍-个在EPICS软件环境下实现的用于加速器的联锁保护系统.系统选取以PLC为核心基于硬件的技术路线,联锁信号以硬件方式在各系统间直接连接,联锁逻辑由PLC处理完成.联锁事件的上报、存档、分析则通过EPICS控制软件系统实现,联锁事件由联锁系统PLC上报到中控系统,PLC通过以太网与EPICS通信.     

氢等离子体裂解煤制乙炔稳态控制系统的设计与实现

为实现2MW氢等离子体裂解煤制乙炔实验装置的安全稳态运行,提高乙炔收率,构建了一套功能完备的控制系统.系统中,采用分时间片方式完成了重要信号的长时间高速持续采集;利用积分分离控制算法改善控制效果,实现了稳态控制;将C/S与B/S模式结合,为本地及异地实验人员提供了快速、直观的数据支持.实验表明,系统具有良好的实时性、稳定性及可用性.     

高速核脉冲信号数字存储示波器的研制

针对核脉冲信号数字化处理的研究需求及当前示波器的应用限制,以高速FPGA系统为核心,采用80 M高速ADC、信号调理电路和USB接口,设计了高速核脉冲信号采集器。通过PC机上编写的软件完成设置、采集数据的接收、显示和存储。设计了双触发模式,从而实现对核脉冲信号的两种采集保存方法,以便于对核脉冲信号的后续处理和研究。测试表明:该设计能够高速、准确地进行核脉冲信号的采集、显示和储存。     

基于B/S方式的远程地震波形浏览系统设计与实现

基于网络B/S模式地震波形数据实时浏览,在现代地震研究与数据服务方面具有重要作用并且技术亟待提高.全面阐述了基于B/S方式实现地震波形数据远程实时浏览的基本思路,软件实现方法、系统体系结构框架以及编程实现.重点研究了远程数据调用、大数据的显示以及JAVA程序开发等关键技术问题.     

三维可视化在60Co集装箱CT检测系统中的设计与实现

本文设计实现了一种三维可视化系统,针对60Co集装箱CT检测系统的数据采集、CT图像重建等过程特点,采用了Ray Casting体绘制的三维显示模式.其绘制子系统不影响CT检测系统在研发过程中其它子系统的改进,方便了各子系统功能的完善与扩展.此三维可视化系统在60Co集装箱CT检测系统中的实验效果较好,可以辅助安检人员...     

基于CAN总线的核医疗设备测控系统设计

介绍了以DSPIC30F6014单片机为核心控制器进行信号检测,并通过执行机构对设备实现控制.系统采用PC总线方式连接新型的CMOS集成温湿度传感器,同时控制CAN总线控制器和总线收发器MCP2551构成的总线通信系统进行数据传输,通过PCI-CAN适配卡将上位机与控制网络连接起来,完成核医疗设备的分布式测控系统设计.详细介绍了系统构成、部分软硬件设计方法等.     

反应堆压力容器的密封分析技术

反应堆压力容器内的冷却剂具有压力高、温度高、放射性剂量高等主要特点,保证压力容器的密封性能对整个核反应堆系统安全运行至关重要.本文针对密封结构的密封性能分析方法与技术进行了研究,包括螺栓预紧、弹塑性接触、热与结构的耦合分析技术等,完成了反应堆压力容器的三维弹塑性密封分析技术研究,全面地考虑了结构承受的各种载荷,实现了结构接触面之间有摩擦的弹塑性接触和接触传热问题的模拟.该分析方法弥补了专用密封分析程序适用范围狭小以及分析过程的烦琐等小足,较目前通用的二维密封分析技术考虑的因素更加全面.该技术已成功应用于工程设计中的压力容器设计与分析.     

Upgraded data service system for HT-7 Tokamak

A data service system plays an indispensable role in HT-7 Tokamak experiment. Since the former system doesn＇t provide the function of timely data procession and analysis, and all client software are based on Windows, it can＇t fulfill virtual fusion laboratory for remote researchers. Therefore, a new system which is simplified by three kinds of data servers and one data analysis and visualization software tool has been developed. The data servers include a data acquisition server based on file system, an MDSplus server used as the central repository for analysis data, and a web server. Users who prefer the convenience of application that can be run in a Web Browser can easily access the experiment data without knowing X-Windows. In order to adjust instruments to control experiment the operators need to plot data duly as soon as they are gathered. To satisfy their requirement, an upgraded data analysis and visualization software GT-7 is developed. It not only makes 2D data visualization more efficient, but also it can be capable of processing, analyzing and displaying interactive 2D and 3D graph of raw. analyzed data by the format of ASCII, LZO and MDSplus.     

A Web-Based System for Remote Data Browsing in HT-7 Tokamak

HT-7 is the first superconducting tokamak device for fusion research in China.Many experiments have been performed on the HT-7 tokamak since 1994 with numerous satisfactory results achieved in the fusion research field. As more and better communication is required with other fusion research laboratories, remote access to experimental data is becoming increasingly important in order to raise the degree of openness of experiments and to expand research results. The web-based remote data browsing system enables authorized users in geographically different locations to view and search for experimental data without having to install any utility software at their terminals. The three-tier software architecture and thin client technology are used to operate the system effectively. This paper describes the structure of the system and the realization of its functions, focusing on three main points： the communication between the participating tiers, the data structure of the system and the visualization of the raw data on web pages.     

A web based MDSplus data analysis and visualization system for EAST

In an EAST (Experimental Advanced Superconducting Tokamak) experiment, the convenient data analysis and visualization tools are very important for physicists and engineering experts to view the operational status of the device. Along with the increasing data sampling rate and pulse length, it will be increasingly challenging for the end user to view the data conveniently under limited Internet bandwidth. We propose a software based on jScope [1] called WebScope for data visualization. By applying java applet techniques, this software can be accessed directly over the Internet via a variety of web browsers without installing client software. Using this data viewer the frequency will be effectively adjusted according to the computer displaying resolution, which saves the total amount of data to be transferred across the Internet and enables the user to view the data quickly. When the signals are zoomed or unzoomed, the data frequency will be re-adjusted to the displaying resolution. With WebScope, data of various experiments in different servers can be viewed in either a single panel or multiple frames, which makes it easier for cross comparison among different data sources. The system was successfully applied to EAST experiment and achieved excellent performance. Its design, function and implementation details will be introduced in this paper.     

Advanced methods in teaching reactor physics

Modern computer codes allow detailed neutron transport calculations. In combination with advanced 3D visualization software capable of treating large amounts of data in real time they form a powerful tool that can be used as a convenient modern educational tool for (nuclear power plant) operators, nuclear engineers, students and specialists involved in reactor operation and design. Visualization is applicable not only in education and training, but also as a tool for fuel management, core analysis and irradiation planning. The paper treats the visualization of neutron transport in different moderators, neutron flux and power distributions in two nuclear reactors (TRIGA type research reactor and typical PWR). The distributions are calculated with MCNP and CORD-2 computer codes and presented using Amira software.     

Development of a Data Acquisition Control System for the First NBI on EAST

Neutral beam injection （NBI） heating is one of the most efficient auxiliary plasma heating methods for fusion devices. The data acquisition control system （DACS） with PXI （pe- ripheral component interconnect extensions for instrumentation） data acquisition card for the first NBI system in the experimental advanced superconducting tokamak （EAST） is presented in this paper. As an important sub-system, DACS is designed to obtain physical measurement signals in the EAST NBI system and to deal and store these data with the Lempel-Ziv-Oberhumer （LZO） lossless data compression algorithm, as well as offer convenient data call-back and access inter- faces to the user for examining and analyzing the data. Experimental results show that accurate data will ensure that researchers correctly analyze it and then properly adjust the experimental parameters or operation, so DACS should take a large step in improving experimental efficiency. Tile hardware and software sections are briefly presented in this paper, and now this system has been tested to be able to work reliably and steadily.     

The Compression Algorithm for the Data Acquisition System in HT－7 Tokamak

HT-7 superconducting tokamak in the Institute of Plasma Physics of the Chinese Academy of Sciences is an experimental device for fusion research in China. The main task of the data acquisition system of HT-? is to acquire, store, analyze and index the data. The volume of the data is nearly up to hundreds of million bytes. Besides the hardware and software support, agreat capacity of data storage, process and transfer is a more important problem. To deal with this problem, the key technology is data compression algorithm. In the paper, the data format in HT-7 is introduced first, then the data compression algorithm, LZO, being a kind of portable lossless data compression algorithm with ANSI C, is analyzed. This compression algorithm, which fits well with the data acquisition and distribution in the nuclear fusion experiment, offers a pretty fast compression and extremely fast decompression. At last the performance evaluation of LZO application in HT-7 is given.     

用在切伦科夫线谱辐射实验中的微机四路定标器

本文阐述了用于切伦科夫线谱辐射实验中的微机四路定标器的设计思想、功能及结果。微机四路定标器采用硬软件结合的工作方式。在硬件上,可同时接收四路NIM逻辑单元的输入,完成信号的电子转换、选择判弃、定时计数等功能;在软件上,采用机器语言和BASIC语言相结合完成数据获取、中断处理、实时显示、数据存贮以及数据处理等功能,并且在实时测量的同时可进行数据处理。     

MDSplus evolution continues

The MDSplus data system has been in operation on several fusion machines since 1991 and it is currently in use at over 30 sites spread over 5 continents. A consequence is the extensive feedback provided by the MDSplus user community for bug fixes and improvements and therefore the evolution of MDSplus is keeping pace with the evolution in data acquisition and management techniques. In particular, the recent evolution of MDSplus has been driven by the change in the paradigm for data acquisition in long lasting plasma discharges, where a sustained data stream is transferred from the acquisition devices into the database. Several new features are currently available or are being implemented in MDSplus. The features already implemented include a comprehensive Object-Oriented interface to the system, the python support for data acquisition devices and the full integration in EPICS. Work is in progress for the integration of multiple protocols and security systems in remote data access, a new high level data view layer and a new version of the jScope tool for online visualization and the optimized visualization of very large signals.     

通用多路集中火灾报警显示系统

为了对本所自行开发的和从西门子公司引进的各种型号的火灾报警控制器进行监控 ,研制了通用多路集中火灾报警显示系统 (Windows版 )。该软件适用性广 ,操作界面友好。它集微机通讯、数据库、多媒体技术于一体 ,具有火源监测、报警显示、数据存储、信息检索等功能。其制图部分使用户可以方便地对楼层图上各种消防设施和房间标志进行添加、删除、移动、修改及尺寸变换 ;图形转换部分令该系统能直接使用AutoCAD等流行制图软件制作的矢量图形 ;管理部分则提供交接班管理及工作人员管理等功能