Analysis of the Influence of Piston Deformation on Effective Area Under High Pressure and Application of Uncertainty Evaluation
The liquid piston pressure gauge is an important standard for transmitting values in the pressure field,and the effective area of the piston is an important indicator for determining the qualification of the piston pressure gauge.For the 0.05 level piston pressure gauge with a measurement upper limit of 60 MPa,the starting balance method is used to study the experimental mechanism,calculate the effective area of the tested piston under different measurement pressures,study the influence of deformation on the effective area of the piston,use linear regression method to calculate the zero pressure area of the tested piston,and build an uncertainty model for the effective area of the piston.The uncertainty influencing components are analyzed,the uncertainty size of each component is evaluated,and the expanded uncertainty of the effective area of the tested piston is calculated to guide the accurate and reliable transmission of measurement values in the pressure standard laboratory.
high pressurepiston deformationeffective areauncertainty
NETL
NSTL
万方数据
