具有温度补偿的高精度同步数据采集  

High-Precision Synchronous Data Acquisition with Temperature Compensation

作　　者：王宽[1] 李盘文[1] 彭瑞元[1] WANG Kuan;LI Panwen;PENG Ruiyuan(Chinese Flight Test Establishment, Xi’an 710089, China)

机构地区：[1]中国飞行试验研究院,西安710089

出　　处：《兵器装备工程学报》2021年第3期193-196,共4页Journal of Ordnance Equipment Engineering

摘　　要：针对机载测试空间电磁环境复杂、温度变化范围大,严重影响数据采集精度的问题,设计了一种带温度补偿的高精度同步数据采集系统;该系统采用过采样抽取滤波算法,滤除系统中的高频噪声干扰,减小采样过程中的量化误差,然后建立一种带温度补偿的增益误差校准模型,降低环境温度变化对采集精度的影响,基于时钟分相法的同步算法实现信号的同步采集,满足不同测试系统之间数据融合分析的需求;最后对不同环境下的信号进行采集分析,结果表明:该方法能够有效减小采集误差,提高系统测试精度;系统同步精度优于150 ns,满足不同系统之间数据融合分析的要求。Aiming at the problems that the electromagnetic environment of the airborne test space is complex and the temperature range is large,which seriously affects the accuracy of data acquisition,a high-precision synchronous data acquisition system with temperature compensation was designed.The system first used an oversampling decimation filtering algorithm to filter out high-frequency noise interference in the system and reduce the quantization error in the sampling process.Then,a gain error calibration model with temperature compensation was established to effectively reduce the environmental temperature changes to the acquisition.Then it processed the synchronization algorithm based on the clock phase division method realizes the synchronous acquisition of signals to meet the requirements of data fusion analysis between different test systems.Finally,by collecting and analyzing the signals in different environments,the results show that the method can effectively reduce the collection error and improve the system test accuracy,and the system synchronization accuracy is better than 150 ns,which meets the requirements of data fusion analysis between different systems.

关 键 词：抽取滤波 温度补偿 时钟分相 同步采集 增益误差 

分 类 号：TP23[自动化与计算机技术—检测技术与自动化装置]