液体压力计的测量不确定度评定

液体压力计是利用液柱自重产生的压力与被测压力平衡的原理而制成的压力计。由于其具有较好的稳定性和不确定度,因此它被广泛用作压力计量的基标准器具,在我国低压段压力量值传递中担当重要角色。从其工作原理和数学模型入手,对其不确定度分析方法进行了阐述。

The Evaluation of Uncertainty in Measurement of the Hydraulic Manometer

One of the earliest methods of pressure measurement, and still one of the most accurate today, is the manometer. The essential feature of a manometer is a vertical of fluid, suitably contained and supported at the bottom by an applied pressure. The magnitude of the pressure is the product of the column height, the density of the fluid, and the acceleration due to gravity plus whatever pressure is applied to the top surface of the fluid column. Because of the high accuracy and long-term stability, it is mostly use as the primary standards or working standards, In China, it is also widely taken as an important role in the lower pressure value disemi-nation. Proceeds with the principle and the maths model, and gives the explanation of the uncertainty analysis for the manometer.