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요약정보
一种高精度手持谐振密度计的研究 / Study of High Precision Handheld Resonance Densitometer
Resource Type
Academic Journal
Authors
边旭
;
贺瑞芸
;
钟沃楼
;
李胜树
;
张希睿
;
黄新敬
;
BIAN Xu
;
HE Rui-yun
;
ZHONG Wo-lou
;
LI Sheng-shu
;
ZHANG Xi-rui
;
HUANG Xin-jing
Source
仪表技术与传感器 / Instrument Technique and Sensor
. (4):26-30
Subject
姿态补偿
谐振频率
电磁感应
密度
手持式
高精度
Language
Chinese
ISSN
1002-1841
Online Access
Find it @ DONGA
초록
为了实现一种高精度手持式谐振密度计,设计了一种谐振频率测量传感器,并根据其结构特点提出了一种基于姿态补偿的测量方法.该谐振频率测量传感器创新性地将姿态角补偿引入测量流程中,首先,通过理论推导,建立了谐振频率测量传感器的姿态补偿简化模型,研究了钕铁硼磁柱做单自由度运动所产生位移的动态过程,确定了姿态角对待测液体密度的影响形式,并导出了补偿函数,得到了感应电动势基础补偿值和姿态角之间的三维函数关系,从根本上消除了手持式谐振密度计测量过程中姿态变化所导致的测量结果精度和鲁棒性下降问题.同时搭建了实验平台,实验结果表明:设备姿态角对测量精度和稳定性存在一定的影响,通过统计姿态角补偿和未补偿模型计算结果,在设计的 4组实验中,应用补偿模型待测液体密度平均绝对误差为 4.35×10-5 g/cm3,方差均稳定在 10-11 量级,相比未补偿模型平均绝对误差提高了约0.00156 g/cm3,方差减小了约10-5 量级.
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