间隙密封被动活塞式气体流量标准装置具有操作简单、测量效率高、无水银密封、易于携带和具有自动温压补偿功能等优点,在气体微小流量测量中广泛使用。但目前国内尚无间隙密封被动活塞式气体流量标准装置的技术规范。被动活塞的上下往复运动对测量管路内的压力会产生波动,直接用流量测量法对间隙密封被动活塞式气体流量标准装置进行量值溯源还存在一些困难。针对这一情况,提出了一种利用几何测量法对间隙密封被动活塞式气体流量标准装置进行量值溯源的新方法,对几何测量溯源法进行了不确定度评估,并与国外相关机构进行了比对验证。结果表明,利用几何测量法对间隙密封被动活塞式气体流量标准装置进行溯源的方法是可行的。
Abstract
In the low gas flow measurement area, passive gas piston prover with clearance-sealed are widely used, because it has the advantages of eazy operation, high measurement efficiency, no mercury seal, easy to carry, and has function of automatic temperature and pressure compensation. However, there is no calibration specification for passive gas piston prover with clearance-sealed in China,The reciprocating motion of the passive piston will cause pressure fluctuation in the measuring pipeline.The traceability for passive gas piston prover with clearance-sealed using flow measurement method directly still has some difficulties. In this situation, a new traceability method for calibration passive gas piston prover with clearance-sealed by geometry measurement method is detailed described, the uncertainty of the geometry measurement method is also evaluated, and comparison with relevant foreign institution is performed for uncertainty verification.The test results show that the passive gas piston prover with clearance-sealed can be calibrated by geometry measurement method perfectly.
关键词
流量测量 /
气体流量标准装置;间隙密封;被动活塞;量值溯源
Key words
flow measurement /
gas flow standard device /
clearance-sealed /
passive piston /
traceability
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基金
上海市2023年度科技创新行动项目资助(23YF1459300)
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