两种A/D转换数据采集系统的研究  

Research on Two Kinds of Data Acquisition Systems for A/D Conversion

作　　者：顾颂琦[1,2] 姜政[2] 黄宇营[2] 翁正新[1] GU Song-qi JIANG Zheng HUANG Yu-ying WENG Zheng-xin(Department of Automation, Shanghai Jiaotong University, Shanghai 200240, China Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China)

机构地区：[1]上海交通大学自动化系,上海200240 [2]中国科学院上海应用物理研究所,上海201204

出　　处：《实验室研究与探索》2016年第9期144-147,226,共5页Research and Exploration In Laboratory

摘　　要：在直接型A/D转换数据采集系统的基础上,开发了电压频率变换型的间接型A/D转换数据采集系统。在两者性能对比分析的基础上,进行了对比实验和XAFS实验图谱质量分析,结果是间接型A/D转换系统积分特性更适合普通的XAFS谱数据采集,而直接型A/D转换系统的快速响应更适合快速XAFS谱数据采集。A new data acquisition system which is a indirect voltage-to-frequency A/D converter is developed based on the old direct A/D converter. After comparing theoretically the performances of the two systems, comparative experiments and analyses of the XAFS experimental spectrums are completed. It is found that the indirect A/D conversion system is suitable for ordinary XAFS spectrum data collection,and the direct A/D conversion system is suitable for rapid XAFS spectrum data collection.

关 键 词：A/D转换器 数据采集系统 XAFS 

分 类 号：TP27[自动化与计算机技术—检测技术与自动化装置] TL8[自动化与计算机技术—控制科学与工程]