作者：李晶晶, 吴晓昱, 桑素丽, 王建民, 周齐, 滕梓洁, 史去非, 李晨
作者单位：北京市计量检测科学研究院, 北京 100029
关键词：计量学;浮子流量计;可移动液体流量标准装置
摘要：
针对建设专用装置检定浮子流量计，场地占用大且无法满足实流检定的问题，研制一种流量范围为0.006~16 m3/h的可移动浮子流量计检定装置。装置原理为静态质量法，1台150 kg的高准确度电子秤为主标准器。用专用电动换向器，保证换向同步性。设计基于可编程逻辑控制器（PLC）的控制系统，通过对夹表器夹紧力的实时监测，大幅度降低被测浮子流量计玻璃管在安装过程中损坏的可能性。采用液体流量标准装置检定规程中的方法对整套装置进行实验及不确定度评定，得到其扩展不确定度为0.25%（k=2）。装置具有方便移动、可拆卸、可快速组合的特点，能够满足准确度等级1.0级及以下浮子流量计实验室或现场校准的需求。
Development of a movable and efficient combined float meter calibration facility
LI Jingjing, WU Xiaoyu, SANG Suli, WANG Jianmin, ZHOU Qi, TENG Zijie, SHI Qufei, LI Chen
Beijing Institute of Metrology, Beijing 100029,China
Abstract: Current calibration facilities for float meters need to build specific facilities, occupy large area, and can’t meet the actual conditions in the field. To address these issues, a movable calibration facility can operate in the flow rate range of 0.006-16m3/h was established in this study. For high-accuracy liquid flowmeter calibration purposes, generally, gravimetrically based facility was in use. High-accuracy electronic scale with 150 kg was utilized as master standard. Electric diverter was employed to confirm the synchronization and avoid the potential issue of traditional diverters, which might not be operated in the field due to lack of gas source. Additionally, PLC- based control system was designed to reduce the damage possibility of glass tube in float meter during the installation by real-time monitoring the clamping force of the clamp. As a result, the preliminary expanded uncertainty (k=2) of this liquid flow standard facility was estimated to be 0.25%. Moreover, this novel float meter calibration facility is capable to move, disassemble, and quick assemble and install, and can be applied for laboratory and field calibration of 1.0 and below accuracy class float meter.
Keywords: metrology;float meter;movable liquid flow calibration facility
2019, 45(8):100-105 收稿日期: 2019-04-26;收到修改稿日期: 2019-05-12
基金项目: 2018年国产质监领域计量科学仪器验证评价与推广（Z181100009518012）；北京市计量检测科学研究院青年基金项目（KJ2018-14）
作者简介: 李晶晶(1982-),女,黑龙江大庆市人,高级工程师,博士后,主要从事流量计量领域技术和方法研究
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