摘要
传统振弦式应变计校准装置一般采用人力或小功率电机驱动作为驱动力,难以满足需施加大测力的振弦式应变计校准要求。基于此,设计并研制了一种基于液压驱动的振弦式应变计校准装置,以解决大测力振弦式应变计难校准的问题。校准装置可以在50~200 mm范围内调整,设计了通用夹具来实现不同尺寸、不同型号和不同形状振弦式应变计的装夹紧固。该装置结构紧凑,操作便利省力,经验证液压驱动在极大减轻校准所需施加力的同时,校准结果与传统应变计测量数据相一致,验证实验的测量不确定度U=0.6%(k=2),小于0.7%,满足校准规范要求。
Traditional vibrating wire strain gauge calibration devices generally use manual or low-power motor drives as the driving force,making it difficult to meet the calibration requirements of vibrating wire strain gauges that require large measurement forces.To address this issue,a hydraulic-driven vibrating wire strain gauge calibration device has been designed and developed.The calibration device can be adjusted within a range of 50-200 mm,and a universal fixture has been designed to achieve clamping and fastening of vibrating wire strain gauges of different sizes,models,and shapes.The device features a compact structure and convenient,labor-saving operation.It has been verified that the hydraulic drive greatly reduces the force required for calibration,while the calibration results remain consistent with traditional strain gauge measurement data.The experimental measurement uncertainty U=0.6%(k-2)is less than 0.7%,meeting the calibration specification requirements.
作者
李婷
杨璐
陈夏平
王梦麒
张拥军
LI Ting;YANG Lu;CHEN Xiaping;WANG Mengqi;ZHANG Yongjun(Hunan Institute of Metrology and Test,Changsha 410014,China)
出处
《计量科学与技术》
2024年第3期52-57,37,共7页
Metrology Science and Technology
基金
国家市场监督管理总局科技计划项目“基于液压件驱动的应变计校准装置关键技术研究”(2021MK077)。
关键词
计量学
振弦式应变计
校准装置
大测力
液压驱动
通用夹具
测量不确定度
metrology
vibrating wire strain gauge
calibration devices
large measurement forces
hydraulic drives
universal fixtures
measurement uncertainty
