基于FPGA的X射线光谱数据采集系统设计  

Design of X⁃ray spectrum data acquisition system based on FPGA

作　　者：孟源 唐琳 MENG Yuan;TANG Lin(School of Information Science and Engineering,Chengdu University,Chengdu 610106,China;Geomathematics Key Laboratory of Sichuan Province,Chengdu University of Techonolgy,Chengdu 610059,China)

机构地区：[1]成都大学信息科学与工程学院,四川成都610106 [2]成都理工大学数学地质四川省重点实验室,四川成都610059

出　　处：《现代电子技术》2021年第6期20-23,共4页Modern Electronics Technique

基　　金：国家自然科学基金资助课题(61601063);数学地质四川省重点实验室开放基金资助课题(scsxdz2019zd04)。

摘　　要：以X射线透射衰减规律为基础,设计一款基于FPGA的X射线光谱数据采集系统。系统在硬件结构上由测量装置和数字脉冲信号处理器组成,其中,测量装置包括放射源、样品、探测器三个部分,数字脉冲信号处理器则由前端电路、模数转换电路以及FPGA中的脉冲甄别、数字成形单元组成,成形后的脉冲幅度经单片机进行多道成谱并最终绘制出X射线光谱图。经测试,该文系统有效地实现了多道谱数据的采集且稳定性良好。An X⁃ray spectrum data acquisition system based on FPGA is designed on the basis of the laws of X⁃ray transmission and attenuation.The hardware structure of the system is composed of the measuring device and the digital pulse signal processor.The measuring device consists of three parts:radiation source,sample and detector.The digital pulse signal processor consists of front⁃end circuit,the analog⁃to⁃digital conversion circuit,the pulse discrimination unit in FPGA and digit forming unit.The multi⁃channel forming spectrum operation of the formed pulse amplitude is performed with single⁃chip microcomputer to draw up the X⁃ray spectrum finally.The testing results indicate that the system can effectively realize the acquisition of multi⁃channel spectrum data and has good stability.

关 键 词：光谱数据采集 X射线 FPGA 调理电路设计 光谱图绘制 系统测试 

分 类 号：TN144-34[电子电信—物理电子学] TP274.2[自动化与计算机技术—检测技术与自动化装置]