A separate heating gas pressure calibration device with adjustable optical path

Abstract

The invention relates to a split heating type gas pressure calibration device with adjustable optical path, which belongs to the field of measurement calibration. The heating of the gas medium inside the calibration device is realized by installing a cast aluminum heating jacket opposite to the cavity of the calibration device. The outer end surface of the cast aluminum heating jacket is flush with the end surface of the cavity, and the cast aluminum heating jacket and the outer end surface of the cavity are installed with sealing gaskets, and the end cover is fixed on the cavity by bolts. The first concave mirror is fixedly installed on the inner wall of the rear end cover, the second concave mirror and the third concave mirror are installed on the inner wall of the front end cover, and the attitude can be adjusted by adjusting the screw to ensure the adjustment of the optical path inside the calibration device. The temperature and pressure control system can not only realize the high-precision control of the temperature and pressure inside the cavity, but also ensure the uniformity of the temperature inside the cavity. The invention significantly improves the controllability of the temperature and pressure in the cavity, the timeliness and the stability of the optical path, and is suitable for pressure traceability based on optical measurement means in high temperature and high pressure environments.

Description

technical field [0001] The invention relates to a split heating type gas pressure calibration device with adjustable optical path, which belongs to the field of measurement calibration. Background technique [0002] The problem of traceable pressure measurement is the primary problem restricting the development of pressure measurement technology. Based on the refractive index or absorption spectrum, the direct measurement of pressure can be realized, which is an ideal traceable pressure measurement method. But for gas pressure measurement, both methods will face the outstanding problem of temperature change. Therefore, it is particularly important to conduct an in-depth analysis of the temperature effect in the gas pressure measurement based on the refractive index and absorption spectrum and to study the corresponding temperature compensation correction method. Designing a device that can simultaneously achieve high temperature and high pressure environments and is used f...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a separate heating type gas pressure calibration device with adjustable optical path to solve the problems that the heating efficiency and device structure of the gas pressure calibration device based on optical measurement can not be balanced, and the optical path system is unreliable under high temperature and high pressure environment. In particular, it relates to a separate heating type gas pressure traceability device with adjustable optical path in high temperature and high pressure environment based on optical measurement such as laser interferometer

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