液体压力计的测量不确定度评定  

The Evaluation of Uncertainty in Measurement of the Hydraulic Manometer

作　　者：李燕华[1] 

机构地区：[1]中国计量科学研究院热工处,北京100013

出　　处：《宇航计测技术》2004年第2期23-25,共3页Journal of Astronautic Metrology and Measurement

摘　　要：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。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.

关 键 词：液体压力计 测量不确定度 评定 数学模型 

分 类 号：TH823.2[机械工程—仪器科学与技术]