用于液体流量标准装置的便携式时间间隔测试仪的设计与研制  

Development of Portable Time Interval Measuring Instrument for Liquid Flow Standard Devices

作　　者：毕晓龙 邢超[2] 吴波 管洪辉 毕崇盛 BI Xiaolong;XING Chao;WU Bo;GUAN Honghui;BI Chongsheng(Dandong Best Automatic Engineering Meter Co.Ltd.,Dandong 118009,China;National Institute of Metrology,Beijing 100029,China;Guangzhou Institute of Energy Testing,Guangzhou 511447,China)

机构地区：[1]丹东贝特自动化工程仪表有限公司,丹东118009 [2]中国计量科学研究院,北京100029 [3]广州能源检测研究院,广州511447

出　　处：《计量科学与技术》2022年第8期13-17,共5页Metrology Science and Technology

基　　金：国家重点研发计划项目(2019YFB2006601);工业互联网标识解析二级节点项目(TC190A3X8-3)。

摘　　要：对于液体流量标准装置而言,计时系统的计时准确性直接影响装置最终流量测量结果,需要定期对其开展维护和检定。传统的计时检测系统往往体积较大,搬运和携带不易,其一般与测控系统相互集成,拆卸送检困难,并且缺少适合流量装置特点的标定接口。针对现有计时检测系统的局限性,设计并研制了一款面向瞬时流量法液体标准装置的便携式时间间隔测试仪,其可测量时间间隔范围为1μs~10000 s,测量精度为10μs,显示分辨率不低于1μs,准确性不低于1.0×10^(-6)。基于中国计量科学研究院热水流量标准装置开展了相关性能验证实验,测试结果表明:装置计时系统的相对示值误差优于0.002 4%,研制的时间间隔测试仪相对误差优于4.2×10^(-7),重复性优于1.82×10^(-7),其计时准确度高、性能稳定可靠,可有效满足液体流量标准装置计时系统的检定和测试需求,也可以为未来液体流量装置测量能力提升与液体流量计量技术的发展发挥积极作用。The timing accuracy of the timing system directly affects the final flow measurement result of liquid flow standard devices, which requires regular maintenance and calibration. The traditional timing verification system is often bulky and difficult to carry and transport. It is generally integrated with the measurement and control system, difficult to disassemble and send for inspection, and lacks the calibration interface suitable for the experimental characteristics of flow standard device. In view of the limitations of the existing timing system verification methods, a portable time interval measuring instrument was designed and developed for the instantaneous flow method liquid flow standard devices, which can measure the time interval range from 1 μs to 10000 s, with measurement accuracy of 10 μs, display resolution not less than 1μs, and the accuracy is not less than 1.0×10^(-6). The performance verification experiment was carried out based on the hot water flow standard facility of China National Institute of Metrology, and the test results showed that: The relative error of the timing system is better than 0.0024 %, and the relative error of the time interval measuring instrument is better than4.2×10and its repeatability is better than 1.82×10. 10 μs, the display resolution is not less than 1μs, and the accuracy is not less than 1.0×10. The performance verification experiment was carried out based on the hot water flow standard facility of China National Institute of Metrology, and the test results showed that: The relative error of the timing system is better than 0.002 4%, and the relative error of the time interval measuring instrument is better than 4.2×10^(-7)and its repeatability is better than 1.82×10^(-7). Its timing accuracy is high and its performance is stable and reliable, which can effectively meet the verification and testing requirements of the timing system of the liquid flow standard facility. It also plays a positive role in improving the measuring capacity of liquid flow faci

关 键 词：液体流量标准装置 瞬时流量法 计时系统 时间间隔测试仪 计量 

分 类 号：TH814[机械工程—仪器科学与技术]