摘要
鉴于遥测采编控制系统不断朝着微型化、高精度等方向发展,针对遥测信号采集处理分析的稳定性,提出软硬件相结合的优化方案。对采集电路中运算放大器输入端的耦合干扰进行模型分析,据此优化模拟量信号调理电路,增强设备抗干扰能力;在A/D转换前端进行隔离缓冲和低通抗混叠滤波处理,实现阻抗匹配,提高转换精度;按照提前编写的ROM表控制采集通道切换;设计双流水线型的采样逻辑时序以保证数据传输稳定性;同时对量化结果进行软件校正,提高采集准确性。经验证,在全量程测量时,可实现精度优于±1‰的高可靠采集,具有高通用性,对其他采编器设计有较强的参考价值。
The telemetry acquisition and editing control system is developing towards the direction of miniaturization and high precision,etc.Aiming at the stability of telemetry signal acquisition and processing analysis,an optimization scheme combining software and hardware was put forward.Based on the model analysis of the coupled interference at the input of operational amplifier in the acquisition circuit,the analog signal conditioning circuit was optimized to enhance the anti-interference ability of the equipment.Before A/D conversion,isolation buffering and low-pass anti-aliasing filtering were carried out to achieve impedance matching and improve conversion accuracy.The acquisition channel switch was controlled by a pre-written read-only memory.The sampling logic timing sequence of double pipelining was designed to ensure the stability of data transmission.Meanwhile,the quantitative results were corrected by software to improve the acquisition accuracy.It has been verified that in the full range of measurement,the accuracy is higher than±1‰and the collection is highly reliable,which has a high universality and has a strong reference value for other acquisition coding devices.
作者
李圣昆
陈晓敏
文丰
袁小康
薛志超
张志龙
LI Shengkun;CHEN Xiaomin;WEN Feng;YUAN Xiaokang;XUE Zhichao;ZHANG Zhilong(National Key Laboratory for Electronic Measurement Technology,North University of China,Taiyuan 030051,China;Key Laboratory of Space Physics,China Academy of Launch Vehicle Technology,Beijing 100076,China)
出处
《兵器装备工程学报》
CSCD
北大核心
2021年第7期216-221,共6页
Journal of Ordnance Equipment Engineering
关键词
数据采集
干扰分析
抗混叠滤波
时序控制
校正算法
data acquisition
noise analysis
anti-aliasing filter
sequential control
correction algorithm
作者简介
李圣昆(1980—),男,硕士,副教授;通信作者:文丰(1977—),男,博士,教授,E-mail:nucwenfeng@163.com。
