Towards the realization of an optical pressure standard
Towards the realization of an optical pressure standard
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DOI：
10.1016/j.measurement.2018.09.069
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发表时间：
2019-01-01
期刊：
影响因子：
5.6
通讯作者：
Zucco, M.
中科院分区：
文献类型：
--
作者：
Mari, D.;Pisani, M.;Zucco, M.
实现了一种新型的基于光干涉的气压标准。本文介绍了该系统的初步成果，通过测量气体的折射率，获得了1 ~ 120 kPa的标准气压。的光学系统的响应已初步评估测量其灵敏度为氮气和空气，在一个压力变化和检测到的干涉条纹的数量之间的比率。之后，干涉仪已被几何特征化，以便执行气体的折射率的绝对测量，从而允许气体压力的光学测量。接下来的步骤是将光学系统获得的一系列测量结果与120 kPa的参考压力标准进行比较。在1 ~ 120 kPa范围内，与两种电容式膜片压力计进行了比较，在大气压下，该装置的相对标准不确定度为170 ppm。(C)2018爱思唯尔有限公司版权所有。
A novel pressure standard based on optical interferometry has been realized. The paper presents a preliminary achievement of the system, in which the standard pressure between 1 kPa and 120 kPa is obtained through the measurement of the refractive index of a gas. The response of the optical system has been initially evaluated measuring its sensitivity for nitrogen and air, in terms of the ratio between a pressure variation and the number of detected interferometric fringes. Afterwards, the interferometer has been geometrical characterized in order to perform an absolute measurement of the refractive index of the gas, allowing an optical measurement of the gas pressure. The following step has been to compare the results of a series of measurements obtained with the optical system with a reference pressure standard at 120 kPa. Finally, the standard has been compared with two capacitance diaphragm gauges in the range between 1 kPa and 120 kPa.The device has a relative standard uncertainty equal to 170 ppm at atmospheric pressure. (C) 2018 Elsevier Ltd. All rights reserved.