A Visual Monitoring Device for Cryogenic Fluid Based on Laser Interferometry

Abstract

The invention discloses a device for visually monitoring cryogenic fluid based on laser interferometry. The device comprises a vacuum box and a test tube which is arranged in the vacuum box, wherein the test tube is provided with two inner light window panes; the vacuum box is provided with two outer light window panes; the device also comprises an optical measurement system; the optical measurement system comprises a laser emitter, a beam expander, a collimating lens, a light splitter, a first reflecting mirror, a second reflecting mirror, a screen and a camera. The device can be used for obtaining concentration distribution of the cryogenic fluid surface through the laser interferometry and accurately and visually monitoring behavioral characteristics of the cryogenic fluid; by arranging the four light window panes, the light can transmit the cryogenic fluid; by arranging the second reflecting mirror, the light can transmit in the cryogenic fluid for two times, so that the interference effect can be enhanced; the optical measurement system of the device is arranged outside the vacuum box; the vacuum box is small in size and is capable of adjusting all the parts of the optical measurement system at any time during testing, so that the experiment is relatively convenient to operate.

Description

technical field [0001] The invention relates to a low-temperature fluid flow experiment device, in particular to a low-temperature fluid visual monitoring device based on laser interferometry. Background technique [0002] Cryogenic liquids (such as liquid oxygen, liquid nitrogen, etc.) are very important commodities, and are widely used in the fields of steel industry, chemical industry, food industry and aerospace military industry. At present, the research on cryogenic fluids lacks an effective method for real-time monitoring of fluid behavior due to key issues such as sealing and heat insulation. [0003] The non-contact visual monitoring device of cryogenic fluid is of great significance for studying the flow state, disturbance effect and heat and mass transfer process of cryogenic fluid. With the help of the experimental device, the surface concentration distribution of the fluid can be obtained by laser interferometry without any influence on the fluid itself, so tha...

AI Technical Summary

Problems solved by technology

It solves the problem that the existing technology cannot satisfy the observation of the change of the cryogenic fluid flow state, and the problem that the camera is installed in the vacuum box results in a large volume of the vacuum box, and the problem that the position and posture of the camera cannot be adjusted during the test

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