基于PXIe总线的数字示波器现场高效校准系统  

Digital Oscilloscope Parallel Calibration System based on PXIe Bus

作　　者：宋佳玲 李建[1] 高岩晶[1] 郭伟民[1] SONG Jialing;LI Jian;GAO Yanjing;GUO Weimin(Centre of Metrology and Measurement,China Academy of Engineering Physics,Mianyang,621000)

机构地区：[1]中国工程物理研究院计量测试中心,绵阳621000

出　　处：《导弹与航天运载技术（中英文）》2023年第2期131-136,共6页Missiles and Space Vehicles

摘　　要：为提高数字示波器现场校准效率,提出一种可并行校准5台1GHz及以下带宽的数字示波器的软硬件实现方法。按照GJB7691-2012对计量标准装置的要求,每个数字示波器校准通道均需具备直流电压、时标、稳幅正弦波和快沿脉冲4种基本信号输出功能和电阻测量功能。4种信号输出功能及电阻测量功能的模块设计、与被校数字示波器之间的通路设计以及并行校准软件设计是实现现场高效校准的重点。对校准装置的软硬件总体方案进行设计,对装置的主要功能模块实现方法以及并行校准软件设计方法进行了详细描述,设计并行按需校准、并行校准和串行校准试验,试验结果表明此方法可快速、高效地实现数字示波器的并行校准。In order to improve the calibration efficiency of digital oscilloscopes,a software and hardware implementation method for parallel calibration of five digital oscilloscopes below 1GHz is proposed.According to the requirements of GJB 7691-2012"verification regulation of digital oscilloscopes",each calibration channel of oscilloscopes should have four basic signal output functions:DC,time scale,amplitude stabilized sine wave,fast edge pulse and resistance measurements function.The module design of the four signal output functions and resistance measurement functions,the path design with the calibrated digital oscilloscope and the parallel calibration software design are the key points to realize the on-site efficient calibration.Firstly,the overall software and hardware scheme of the calibration device is designed.Secondly,the implementation methods of the main functional modules of the device and the design methods of the parallel calibration software are described in detail.Finally,through the design of parallel on-demand calibration,parallel calibration and serial calibration experiments,the experimental results show that this method can quickly and efficiently realize the parallel calibration of digital oscilloscopes.

关 键 词：数字示波器 并行校准 开关拓扑 现场高效 

分 类 号：TP311.52[自动化与计算机技术—计算机软件与理论]