一维多道快电子能量损失谱仪的数据获取系统  

The Data Acquisition System Used in One-dimension Multichannel Fast Electron Energy Loss Spectrometer

作　　者：姜维春[1] 朱林繁[1] 张义军[1] 徐克尊[1] 

机构地区：[1]合肥微尺度物质科学国家实验室,中国科学技术大学近代物理系,安徽合肥230026

出　　处：《核电子学与探测技术》2010年第11期1446-1449,1458,共5页Nuclear Electronics & Detection Technology

基　　金：中国国家自然科学基金(10734040)

摘　　要：介绍了用于一维多道快电子能量损失谱仪的数据获取系统。利用简单的与门电路,并配合DAQ2010采集卡的门控信号实现精确定时,利用定时卡PCI8554来同步采集卡和微机的动作,利用微机的RS232接口通讯来控制扫描电源,从而实现了谱仪的扫描测量。利用多线程技术,提高了采集系统的容错能力。该系统目前已经用在电子能量损失谱仪上,效果良好。It describes a data acquisition system used in one dimension multichannel fast electron energy loss spectrometer,which can work in scan acquisition mode and static acquisition mode.The timing precision of the scan mode is less than 4 μs by utilizing the gated signal generated by data acquisition card DAQ2010 and an AND logic circuit.A timer card PCI8554 is used to synchronize the data acquisition card and the personal computer.The scan voltage supply is controlled by the personal computer through the RS232 interface.The multithreading technology is used in the acquisition software in order to improve the accommodating-err ability of the acquisition system.A satisfactory test result is given.

关 键 词：电子能量损失谱仪 位置灵敏多道 数据获取 

分 类 号：TP274.2[自动化与计算机技术—检测技术与自动化装置]