一种活塞式微小液体流量标准装置  

The design of a piston typemicro liquid flow standard device

作　　者：李海洋 孙延博[2] Li Haiyang;Sun Yanbo(Shanghai Institute of Measurement and Testing Technology,Shanghai Key Laboratory of Online Testing and Control Technology;Shanghai Institute of Satellite Engineering)

机构地区：[1]上海市计量测试技术研究院,上海市在线检测与控制技术重点实验室 [2]上海卫星工程研究所

出　　处：《上海计量测试》2021年第6期6-8,15,共4页Shanghai Measurement and Testing

基　　金：上海市市场监督管理局科研项目(2021-11)。

摘　　要：介绍了一种活塞式微小液体流量标准装置,给出了该装置的量值传递图。装置以双活塞并联作为标准器组代替传统单一活塞方式,使装置在不同流量范围下都有较好的准确度。文章还给出了装置各标准不确定度分量及其相对灵敏系数,对装置的扩展不确定度进行了评定。使用该装置对流量范围为2~20 mL/h的液体质量流量计进行了实际校准,同时给出了测量结果的不确定度。试验结果表明,该装置可以用于微小液体流量计、医用输液泵与注射泵检测仪的量值溯源与传递,对微小液体流量的量值准确可靠具有指导意义。This article introduces a piston type micro liquid flow standard device,and gives the quantity transfer diagram.The device uses dual-pistons in parallel as a standard unit instead of the traditional single-piston method,so that the device has better accuracy in different flow ranges.The expanded uncertainty of the standard device is also evaluated,which is given in sections according to the flow range of each piston.The above device is applied in real flow calibration of a liquid mass flowmeter with the flow range of 2-20 mL/h,and then the uncertainty of the measurement results is given.The test result shows that the standard device can be used for the traceability and transmission of values of micro liquid flowmeter.medical infusion pump and syringe pump calibrator.And the work has guiding significance for the subsequent design of micro liquid flow standard device.

关 键 词：微小液体流量计量 双活塞 活塞流量标准装置 不确定度评定 

分 类 号：TH814[机械工程—仪器科学与技术]