CN-121995177-A - Star-shaped three-phase alternating current arc dynamic behavior multi-light path observation system

CN121995177ACN 121995177 ACN121995177 ACN 121995177ACN-121995177-A

Abstract

The invention provides a star-shaped three-phase alternating-current arc dynamic behavior multi-light path observation system which comprises a view finding system, an image acquisition device and an image processing system, wherein the view finding system is arranged on three electrode arms of a star-shaped three-phase alternating-current arc heater and an observation window of a mixing chamber, images of the observation window are sent to the image acquisition device through a plurality of optical lenses, and the image acquisition device is in communication connection with the image processing system. The invention forms an optical path through a plurality of lenses to image arc images of the three electrode arms and the mixing chamber of the star-shaped three-phase alternating current arc heater and reflect the images to the high-speed camera respectively, can realize synchronous observation of the dynamic behavior process of the whole arc inside the electrode of the three-phase alternating current arc heater and the whole arc inside the mixing chamber, simultaneously avoids the situation that the camera directly faces to observation windows of the electrode, the mixing chamber and the like, eliminates the damage risk of high temperature and high pressure inside the heater to the camera, and ensures that the optical path structure is flexible and adjustable through the lens adjusting mechanism, thereby being applicable to different observation angles and position requirements.

Inventors

ZHOU FA
CHEN DING
LIU YIN
JIAO FANGKUN
LIU XIANG
CHEN HAIQUN

Assignees

中国航天空气动力技术研究院

Dates

Publication Date: 20260508
Application Date: 20260312

Claims (10)

1. The star-shaped three-phase alternating current arc dynamic behavior multi-light path observation system is characterized by comprising a view finding system, an image acquisition device and an image processing system; the view finding system is arranged on the three electrode arms of the star-shaped three-phase alternating current arc heater and the observation window of the mixing chamber, images of the observation window are sent to the image acquisition device through a plurality of optical lenses, and the image acquisition device is in communication connection with the image processing system.
2. The star-shaped three-phase alternating current arc dynamic behavior multi-light path observation system according to claim 1, wherein the view finding system comprises a first light path component, a second light path component, a third light path component and a fourth light path component, and the image acquisition device comprises a first camera, a second camera, a third camera and a fourth camera; the first light path component is used for sending the image of the first branch electrode arm observation window of the star-shaped three-phase alternating current arc heater to the first camera; the second light path component is used for sending the image of the second branch electrode arm observation window of the star-shaped three-phase alternating current arc heater to the second camera; The third light path component is used for sending the image of the third branch electrode arm observation window of the star-shaped three-phase alternating current arc heater to the third camera; The fourth light path component is used for sending the image of the mixing chamber observation window of the star-shaped three-phase alternating current arc heater to the fourth camera.
3. The star-shaped three-phase alternating current arc dynamic behavior multi-light path observation system according to claim 2, wherein: The first light path component comprises a first lens and a second lens which form a light path, the first lens is arranged on one side of an observation window of a first electrode arm of the star-shaped three-phase alternating current arc heater, and the second lens is arranged on one side of a lens of the first camera; the second light path component comprises a third lens and a fourth lens which form a light path, the third lens is arranged at one side of an observation window of a second electrode arm of the star-shaped three-phase alternating current arc heater, and the fourth lens is arranged at one side of a lens of the second camera; The third light path component comprises a fifth lens and a sixth lens which form a light path, the fifth lens is arranged at one side of an observation window of a third electrode arm of the star-shaped three-phase alternating current arc heater, and the sixth lens is arranged at one side of a lens of the third camera; the fourth light path component comprises a seventh lens and an eighth lens which form a light path, the seventh lens is arranged on one side of an observation window of the mixing chamber of the star-shaped three-phase alternating current arc heater, and the eighth lens is arranged on one side of a lens of the fourth camera.
4. A star-shaped three-phase ac arc dynamic behavior multi-path observation system according to claim 3, characterized in that: The first lens is a reflecting mirror and forms an included angle of 60 degrees with an observation window of the first branch electrode arm, the second lens is a reflecting mirror facing the first lens and the first camera, and forms an included angle of 45 degrees with the first lens and forms an included angle of 45 degrees with a lens of the first camera; The third lens is a reflecting mirror and forms an included angle of 60 degrees with an observation window of the second electrode arm; the fourth lens is a reflecting mirror facing the third lens and the second camera, and forms an included angle of 45 degrees with the third lens and forms an included angle of 45 degrees with the lens of the second camera; the sixth lens is a reflecting mirror facing the fifth lens and the third camera, and forms an included angle of 90 degrees with the fifth lens and an included angle of 45 degrees with the lens of the third camera; The seventh lens is a reflecting mirror and forms an included angle of 45 degrees with an observation window of the mixing chamber, the eighth lens is a reflecting mirror facing the seventh lens and the fourth camera, and forms an included angle of 90 degrees with the seventh lens and forms an included angle of 45 degrees with a lens of the fourth camera.
5. The star-shaped three-phase ac arc dynamic behavior multi-path observation system of claim 3 further comprising a first mounting frame and a second mounting frame; The first mounting frame is positioned on the outer sides of the three electrode arms and coincides with the plane where the central axes of the electrodes are positioned, and is used for mounting the first light path component, the first camera, the second light path component, the second camera, the third light path component and the third camera; The second mounting frame is positioned on the outer side of the mixing chamber and coincides with the central horizontal plane of the mixing chamber, and is used for mounting the fourth light path component and the fourth camera.
6. The star-shaped three-phase ac arc dynamic behavior multi-path observation system of claim 5, wherein the framing system further comprises a lens adjustment mechanism for adjusting the pose of the first, second, third, and fourth path components.
7. The star-shaped three-phase ac arc dynamic behavior multi-path observation system according to claim 6, wherein the lens adjustment mechanism comprises: a lens sliding device movable and fixed along the first and second mounting frames; The adjusting rod comprises a fixed section and a telescopic section, the telescopic section is connected with the lens sliding device, and the fixed section is connected with the telescopic section in a variable angle manner; and the optical lens clamp is connected with the fixed section of the adjusting rod in a variable angle manner and is used for installing each lens.
8. The star-shaped three-phase ac arc dynamic behavior multi-path observation system of claim 5, wherein the image acquisition device further comprises a camera mount for adjusting the pose of the first, second, third, and fourth cameras.
9. The star-shaped three-phase ac arc dynamic behavior multi-path observation system of claim 8, wherein the camera mount comprises: A camera sliding device movable and fixed along the first and second mounting frames; the support plate is connected with the camera sliding device; And the camera support can slide along the supporting plate to adjust the distance between the lens and the lens.
10. The star-shaped three-phase alternating current arc dynamic behavior multi-path observation system according to claim 2, wherein the image processing system comprises a computer device, and wherein the first camera, the second camera, the third camera and the fourth camera are all communicatively connected with the computer device; and any one of the first camera, the second camera, the third camera and the fourth camera is set as a main camera, the other three cameras are associated and synchronous with the main camera, and the computer equipment controls the starting and stopping of the main camera.

Description

Star-shaped three-phase alternating current arc dynamic behavior multi-light path observation system Technical Field The invention relates to the technical field of arc plasma testing, in particular to a star-shaped three-phase alternating current arc dynamic behavior multi-optical path observation system. Background The star-shaped three-phase alternating current arc heater is a device for generating alternating current arc discharge and heating gas by utilizing electric arcs, and the three-phase uniform load formed by the symmetrical structure of the star-shaped three-phase alternating current arc heater enables the star-shaped three-phase alternating current arc heater to form continuous and stable alternating current electric arcs, so that the star-shaped three-phase alternating current arc heater has important application prospect in national defense war industry aerodynamic thermal environment simulation and thermal environment application scenes in other industrial fields. The arc discharge and the operation mechanism of the three-phase alternating current arc heater are greatly different from those of the direct current arc heater, the alternating current arc is periodically generated, moved and extinguished in a plurality of electrodes, and each phase of arc in the three-phase alternating current arc heater is periodically intersected with other arcs in a mixing chamber. The knowledge of the overall motion profile of these processes is key to understanding, and utilizing a three-phase ac arc heater. However, in the prior art, the ac arc cannot be simply observed by a high-speed camera like the dc arc heater, and a multi-optical-path optical observation system is required for synchronous observation and analysis. Disclosure of Invention The invention aims to provide a star-shaped three-phase alternating current arc dynamic behavior multi-light path observation system which can better observe the working condition of a star-shaped three-phase alternating current arc heater; The invention provides a star-shaped three-phase alternating-current arc dynamic behavior multi-light path observation system which comprises a view finding system, an image acquisition device and an image processing system, wherein the view finding system is arranged on three electrode arms of a star-shaped three-phase alternating-current arc heater and an observation window of a mixing chamber, images of the observation window are sent to the image acquisition device through a plurality of optical lenses, and the image acquisition device is in communication connection with the image processing system. The image acquisition device comprises a first camera, a second camera, a third camera and a fourth camera, wherein the first optical path component is used for sending an image of a first branch electrode arm observation window of the star-shaped three-phase alternating-current arc heater to the first camera, the second optical path component is used for sending an image of a second branch electrode arm observation window of the star-shaped three-phase alternating-current arc heater to the second camera, the third optical path component is used for sending an image of a third branch electrode arm observation window of the star-shaped three-phase alternating-current arc heater to the third camera, and the fourth optical path component is used for sending an image of a mixing chamber observation window of the star-shaped three-phase alternating-current arc heater to the fourth camera. The first optical path component comprises a first lens and a second lens which form an optical path, the first lens is arranged on one side of an observation window of a first electrode arm of the star-shaped three-phase alternating current arc heater, the second lens is arranged on one side of a lens of the first camera, the second optical path component comprises a third lens and a fourth lens which form an optical path, the third lens is arranged on one side of an observation window of a second electrode arm of the star-shaped three-phase alternating current arc heater, the fourth lens is arranged on one side of a lens of the second camera, the third optical path component comprises a fifth lens and a sixth lens which form an optical path, the fifth lens is arranged on one side of an observation window of a third electrode arm of the star-shaped three-phase alternating current arc heater, the sixth lens is arranged on one side of a lens of the third camera, the fourth optical path component comprises a seventh lens and an eighth lens which form an optical path, the seventh lens is arranged on one side of an observation window of a mixing chamber of the star-shaped three-phase alternating current arc heater, and the eighth lens is arranged on one side of a lens of the fourth camera. The first lens is a reflecting mirror and forms an included angle of 60 degrees with an observation window of a first electrode arm, the second lens is a reflecting mirr