超声水表流量标准装置系统设计  

Design of a calibration facility system for ultrasonic water meters

作　　者：高科[1] 赵伟国[1] 

机构地区：[1]中国计量学院计量测试工程学院,浙江杭州310018

出　　处：《中国计量学院学报》2015年第3期258-262,290,共6页Journal of China Jiliang University

摘　　要：针对目前传统流量检定标准装置在超声水表检定过程中存在的检定效率低、小流量精度低、流速不稳定等问题,提出了一种高精度组合型的超声水表流量标准装置.该装置以PLC作为硬件控制中心,采用静态质量法与标准表法相结合实现了超声水表的可靠检定;同时在装置中串联3台被检表,以提高检定的效率.实验结果表明,该装置测量的扩展不确定度低于0.4%,参数指标达到了技术要求.In order to solve the shortcomings of low calibration efficiency, low precision in small flow and flow instability in the process of ultrasonic water meter calibration, a calibration facility based on PLC, with high- precision and composition method was designed. The static mass method and master meter method were employed. Three ultrasonic water meters were installed in series to improve calibration efficiency. The experimental data shows that the uncertainty of the measurement is less than 0.4% and the measurement results reach the technical requirements.

关 键 词：超声水表 检定装置 控制系统 不确定度 双时间法 

分 类 号：TH814[机械工程—仪器科学与技术]