Star-shaped three-phase alternating-current arc dynamic behavior multi-optical-path observation system

Abstract

The invention provides a star-shaped three-phase alternating-current arc dynamic behavior multi-optical-path observation system. The star-shaped three-phase alternating-current arc dynamic behavior multi-optical-path observation system comprises a view finding system, an image acquisition device and an image processing system, the view finding system is arranged on three electrode arms of the star-shaped three-phase alternating-current arc heater and an 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. According to the invention, arc images of three electrode arms of the star-shaped three-phase alternating-current arc heater and the mixing chamber are imaged through a light path formed by a plurality of lenses and are reflected to the high-speed camera, so that the dynamic behavior process of the whole arc inside the electrodes of the three-phase alternating-current arc heater and the mixing chamber can be observed synchronously; meanwhile, the camera is prevented from directly facing observation windows such as an electrode and a mixing chamber, and the damage risk of high temperature and high pressure in the heater to the camera is eliminated; and the optical path structure is flexible and adjustable through the lens adjusting mechanism, so that the requirements of different observation angles and positions can be met.

Description

Technical Field

[0001] This invention relates to the field of arc plasma testing technology, and in particular to a multi-optical-path observation system for the dynamic behavior of a star-shaped three-phase AC arc. Background Technology

[0002] The star-shaped three-phase AC arc heater is a device that generates AC arc discharge and uses the arc to heat gas. Its symmetrical structure forms a three-phase uniform load, which enables it to form a continuous and stable AC arc. It has important application prospects in the simulation of aerodynamic thermal environment in national defense and military industries, as well as in thermal environment applications in other industrial fields.

[0003] The arc discharge and operating mechanism of a three-phase AC arc heater differ significantly from those of a DC arc heater. In a three-phase AC arc heater, the AC arc is periodically generated, moves, and extinguishes within multiple electrodes. Furthermore, each phase of the arc periodically intersects with other arcs within the mixing chamber. Understanding the entire dynamic process of these changes is crucial for recognizing, comprehending, and effectively utilizing a three-phase AC arc heater.

[0004] However, in the existing technology, AC arcs cannot be observed as simply as DC arc heaters with a high-speed camera; a multi-path optical observation system is required for synchronous observation and analysis. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-optical-path observation system for the dynamic behavior of a star-type three-phase AC arc heater, which can better observe the working condition of the star-type three-phase AC arc heater. This invention provides a multi-optical-path observation system for the dynamic behavior of a star-shaped three-phase AC arc, including a viewing system, an image acquisition device, and an image processing system. The viewing system is arranged in the observation window of the three electrode arms of the star-shaped three-phase AC arc heater and the mixing chamber, and sends the image of the observation window to the image acquisition device through multiple optical lenses. The image acquisition device is communicatively connected to the image processing system.

[0006] Furthermore, the framing system includes a first optical path component, a second optical path component, a third optical path component, and a fourth optical path component, and the image acquisition device includes a first camera, a second camera, a third camera, and a fourth camera; the first optical path component is used to send the image from the observation window of the first electrode arm of the star-shaped three-phase AC arc heater to the first camera; the second optical path component is used to send the image from the observation window of the second electrode arm of the star-shaped three-phase AC arc heater to the second camera; the third optical path component is used to send the image from the observation window of the third electrode arm of the star-shaped three-phase AC arc heater to the third camera; and the fourth optical path component is used to send the image from the observation window of the mixing chamber of the star-shaped three-phase AC arc heater to the fourth camera.

[0007] Further: The first optical path assembly includes a first lens and a second lens constituting the optical path, the first lens being disposed on the observation window side of the first electrode arm of the star-shaped three-phase AC arc heater, and the second lens being disposed on the lens side of the first camera; the second optical path assembly includes a third lens and a fourth lens constituting the optical path, the third lens being disposed on the observation window side of the second electrode arm of the star-shaped three-phase AC arc heater, and the fourth lens being disposed on the lens side of the second camera; the third optical path assembly includes a fifth lens and a sixth lens constituting the optical path, the fifth lens being disposed on the observation window side of the third electrode arm of the star-shaped three-phase AC arc heater, and the sixth lens being disposed on the lens side of the third camera; the fourth optical path assembly includes a seventh lens and an eighth lens constituting the optical path, the seventh lens being disposed on the observation window side of the mixing chamber of the star-shaped three-phase AC arc heater, and the eighth lens being disposed on the lens side of the fourth camera.

[0008] Further: the first lens is a reflector, and forms a 60° angle with the observation window of the first electrode arm; the second lens is a reflector facing the first lens and the first camera, and forms a 45° angle with the first lens and the lens of the first camera; the third lens is a reflector, and forms a 60° angle with the observation window of the second electrode arm; the fourth lens is a reflector facing the third lens and the second camera, and forms a 45° angle with the third lens and the lens of the second camera. The fifth lens is a reflector and forms a 45° angle with the observation window of the third electrode arm; the sixth lens is a reflector facing the fifth lens and the third camera, and forms a 90° angle with the fifth lens and a 45° angle with the lens of the third camera; the seventh lens is a reflector and forms a 45° angle with the observation window of the mixing chamber; the eighth lens is a reflector facing the seventh lens and the fourth camera, and forms a 90° angle with the seventh lens and a 45° angle with the lens of the fourth camera.

[0009] Furthermore, it also includes a first mounting frame and a second mounting frame; the first mounting frame is located outside the three electrode arms and coincides with the plane where the electrode central axis is located, and is used to mount the first optical path assembly and the first camera, the second optical path assembly and the second camera, and the third optical path assembly and the third camera; the second mounting frame is located outside the mixing chamber and coincides with the horizontal plane of the center of the mixing chamber, and is used to mount the fourth optical path assembly and the fourth camera.

[0010] Furthermore, the framing system also includes a lens adjustment mechanism for adjusting the position and orientation of the first optical path component, the second optical path component, the third optical path component, and the fourth optical path component.

[0011] Furthermore, the lens adjustment mechanism includes: a lens sliding device that can move and be fixed along the first mounting frame and the second mounting frame; an adjustment rod including a fixed section and a telescopic section, the telescopic section being connected to the lens sliding device, and the fixed section being connected to the telescopic section at a variable angle; and an optical lens clamp that is connected to the fixed section of the adjustment rod at a variable angle for mounting each lens.

[0012] Furthermore, the image acquisition device also includes a camera mounting bracket for adjusting the poses of the first camera, the second camera, the third camera, and the fourth camera.

[0013] Furthermore, the camera mounting bracket includes: a camera sliding device that can move and be fixed along the first mounting frame and the second mounting frame; a support plate connected to the camera sliding device; and a camera bracket that can slide along the support plate to adjust the distance between the lens and the lens element.

[0014] Furthermore, the image processing system includes a computer device, and the first camera, the second camera, the third camera, and the fourth camera are all communicatively connected to the computer device; and any one of the first camera, the second camera, the third camera, and the fourth camera is set as the main camera, and the other three cameras are associated and synchronized with the main camera, and the computer device controls the start and stop of the main camera.

[0015] The technical solution of this invention uses multiple lenses to form an optical path to indirectly image the three electrode arms of the star-shaped three-phase AC arc heater, avoiding direct exposure of the camera to the high temperature and high pressure environment and improving equipment safety; it can realize multi-channel synchronous observation of the three-phase AC arc inside the electrode and in the mixing chamber, and fully present the dynamic behavior of the arc; and the optical path structure is flexible and adjustable, which can adapt to different observation angles and position requirements. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the layout of the vertically arranged first mounting frame and the lens adjustment mechanism and camera mounting support mounted on it according to the present invention. Figure 2 This is a schematic diagram of the layout of the horizontally arranged second mounting frame and the lens adjustment mechanism and camera mounting support mounted on it according to the present invention. Figure 3 This is a schematic diagram of the lens adjustment mechanism of the present invention; Explanation of reference numerals in the attached figures; 1-Star-type three-phase AC arc heater; 1-1, Observation window of the first electrode arm; 1-2, Observation window of the second electrode arm; 1-3, Observation window of the third electrode arm; 1-4, Observation window of the mixing chamber; 21-First mounting frame; 22-Second mounting frame; 2-1, Lens adjustment mechanism for the first lens; 2-2, Lens adjustment mechanism for the second lens; 2-3, Lens adjustment mechanism for the third lens; 2-4, Lens adjustment mechanism for the fourth lens; 2-5, Lens adjustment mechanism for the fifth lens; 2-6, Lens adjustment mechanism for the sixth lens; 2-10, Lens adjustment mechanism for the seventh lens; 2-11, Lens adjustment mechanism for the eighth lens; 2-7, Camera mounting bracket for the first camera; 2-8, Camera mounting bracket for the second camera; 2-9, Camera mounting bracket for the third camera; 2-12, Camera mounting bracket for the fourth camera; 3-1, First camera; 3-2, Second camera; 3-3, Third camera; 3-4, Fourth camera; 4-Image processing system; A1, Lens sliding device; B, Adjusting rod; B1, Telescopic section; B2, Fixed section; C, Optical lens clamp; A2, Camera sliding device; D, Support plate; E, Camera mount. Detailed Implementation

[0018] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they may refer to a fixed connection, a detachable connection, or an integral connection; they may refer to a mechanical connection or an electrical connection; they may refer to a direct connection or an indirect connection through an intermediate medium; and they may refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0021] Example 1 like Figures 1-2 As shown, the present invention provides a multi-optical-path observation system for the dynamic behavior of a star-shaped three-phase AC arc, including a viewing system, an image acquisition device, and an image processing system 4. The viewing system is arranged in the observation windows 1-1, 1-2, 1-3, and 1-4 of the three electrode arms of the star-shaped three-phase AC arc heater 1 and the mixing chamber, and sends the images of the observation windows to the image acquisition device through multiple optical lenses. The image acquisition device is communicatively connected to the image processing system 4.

[0022] In this embodiment, the framing system includes an optical image transmission path consisting of multiple lenses (such as mirrors) set at the observation windows of each electrode arm and the mixing chamber. The images of the observation windows of each electrode arm and the mixing chamber are optically transmitted to the image acquisition device (such as a high-speed camera) through these lenses forming the optical path for acquisition. The image processing system 4 (such as a computer device) is communicatively connected to the image acquisition device to transmit data and control its operation. The images of the arc inside the three electrodes and the arc inside the mixing chamber, which are in the same time sequence, are post-processed. The corresponding images from the four cameras are fused into a four-window arc dynamic behavior video, realizing a synchronous video display of the arc convergence process from the inside of the arc heater electrode to the mixing chamber.

[0023] Example 2 like Figures 1-2 As shown, the viewfinder system includes a first optical path assembly, a second optical path assembly, a third optical path assembly, and a fourth optical path assembly, and the image acquisition device includes a first camera, a second camera, a third camera, and a fourth camera; The first optical path assembly is used to transmit the image from the observation window 1-1 of the first electrode arm of the star-shaped three-phase AC arc heater 1 to the first camera 3-1. The first optical path assembly includes a first lens and a second lens constituting the optical path. The first lens is disposed on one side of the observation window 1-1 of the first electrode arm of the star-shaped three-phase AC arc heater 1, and the second lens is disposed on the lens side of the first camera 3-1. The first lens is a reflector and forms a 60° angle with the observation window 1-1 of the first electrode arm. The second lens is a reflector facing the first lens and the first camera 3-1, and forms a 45° angle with the first lens and the lens of the first camera 3-1. The second optical path assembly is used to transmit the image from the observation window 1-2 of the second electrode arm of the star-shaped three-phase AC arc heater 1 to the second camera 3-2. The second optical path assembly includes a third lens and a fourth lens constituting the optical path. The third lens is disposed on one side of the observation window 1-2 of the second electrode arm of the star-shaped three-phase AC arc heater 1, and the fourth lens is disposed on the lens side of the second camera 3-2. The third lens is a reflector and forms a 60° angle with the observation window 1-2 of the second electrode arm. The fourth lens is a reflector facing the third lens and the second camera 3-2, and forms a 45° angle with the third lens and a 45° angle with the lens of the second camera 3-2. The third optical path assembly is used to transmit the image from the observation window 1-3 of the third electrode arm of the star-shaped three-phase AC arc heater 1 to the third camera 3-3. The third optical path assembly includes a fifth lens and a sixth lens constituting the optical path. The fifth lens is located on one side of the observation window 1-3 of the third electrode arm of the star-shaped three-phase AC arc heater 1, and the sixth lens is located on the lens side of the third camera 3-3. The fifth lens is a reflector and forms a 45° angle with the observation window 1-3 of the third electrode arm. The sixth lens is a reflector facing the fifth lens and the third camera 1-3, and forms a 90° angle with the fifth lens and a 45° angle with the lens of the third camera 3-3. The fourth optical path assembly is used to transmit the image from the observation window 1-4 of the mixing chamber of the star-shaped three-phase AC arc heater 1 to the fourth camera 3-4. The fourth optical path assembly includes a seventh lens and an eighth lens constituting the optical path. The seventh lens is positioned on one side of the observation window 1-4 of the mixing chamber of the star-shaped three-phase AC arc heater 1, and the eighth lens is positioned on the lens side of the fourth camera 3-4. The seventh lens is a reflector and forms a 45° angle with the observation window 1-4 of the mixing chamber; the eighth lens is a reflector facing both the seventh lens and the fourth camera 3-4, and forms a 90° angle with the seventh lens and a 45° angle with the lens of the fourth camera 3-4.

[0024] Example 3 like Figures 1-2As shown, it also includes a first mounting frame 21 and a second mounting frame 22. The first mounting frame 21 is located outside the three electrode arms and coincides with the plane containing the central axis of the electrodes. It is used to mount the first optical path assembly and the first camera 3-1, the second optical path assembly and the second camera 3-2, and the third optical path assembly and the third camera 3-3. The second mounting frame 22 is located outside the mixing chamber and coincides with the horizontal plane of the center of the mixing chamber. It is used to mount the fourth optical path assembly and the fourth camera 3-4.

[0025] Specifically, the first mounting frame 21 and the second mounting frame 22 are two square frames that together form an optical support assembly. They form two outer rings around the three electrode arms and the mixing chamber of the star-shaped three-phase AC arc heater 1. A series of adjustment mechanisms that can move along the steel frame and whose end angles are adjustable are set on the mounting frame. A series of reflective lenses set on these adjustment mechanisms reflect the arc images inside the electrodes and in the mixing chamber to the lens group within the field of view of the high-speed camera for acquisition.

[0026] The first mounting frame 21 is a vertical frame that coincides with the plane containing the central axes of the three electrodes and is located outside the imaginary circle formed by the ends of the three electrode arms of the star-shaped three-phase AC arc heater 1. The first optical path assembly and the first camera 3-1, the second optical path assembly and the second camera 3-2, and the third optical path assembly and the third camera 3-3 are arranged around the first mounting frame 21 at different positions to be as close as possible to each electrode arm.

[0027] The second mounting frame 22 is a horizontal frame whose horizontal plane coincides with the center horizontal plane of the heater mixing chamber. The fourth optical path assembly and the fourth camera 3-4 are arranged on the second mounting frame 22 near the observation window of the heater mixing chamber.

[0028] Example 4 like Figures 1-3 As shown, the viewfinder system also includes lens adjustment mechanisms for adjusting the positions of the first optical path assembly, the second optical path assembly, the third optical path assembly, and the fourth optical path assembly. Specifically, it includes a lens adjustment mechanism 2-1 that allows the first lens to be movable and adjustable on the first mounting frame 21, a lens adjustment mechanism 2-2 that allows the second lens to be movable and adjustable on the first mounting frame 21, a lens adjustment mechanism 2-3 that allows the third lens to be movable and adjustable on the first mounting frame 21, a lens adjustment mechanism 2-4 that allows the fourth lens to be movable and adjustable on the first mounting frame 21, a lens adjustment mechanism 2-5 that allows the fifth lens to be movable and adjustable on the first mounting frame 21, a lens adjustment mechanism 2-6 that allows the sixth lens to be movable and adjustable on the first mounting frame 21, a lens adjustment mechanism 2-10 that allows the seventh lens to be movable and adjustable on the second mounting frame 22, and a lens adjustment mechanism 2-11 that allows the eighth lens to be movable and adjustable on the second mounting frame 22.

[0029] The lens adjustment mechanism includes: a lens sliding device A1 (e.g., a sliding sleeve structure), movable and fixed along the first mounting frame 21 and the second mounting frame 22; an adjustment rod B, including a fixed section B2 and a telescopic section B1, the telescopic section B1 being connected to the lens sliding device A1, and the fixed section B2 being variably connected to the telescopic section B1; and an optical lens clamp C, variably connected to the fixed section B2 of the adjustment rod B, for mounting various lenses. The optical lens adjustment mechanism consists of the sliding device A1, the adjustment rod B, and the optical lens clamp C. The sliding device A1 is a device capable of free movement on the first mounting frame 21 and the second mounting frame 22 and is fixedly positioned by a screw. The adjustment rod B consists of two parts: the telescopic section B1 is a telescopically adjustable rod, and the fixed section B2 is a rod of fixed length. Continuous adjustment of different angles from 0-180° is possible between the telescopic section B1 and the fixed section B2, as well as between the fixed section B2 and the optical lens clamp C.

[0030] In this embodiment, the lens adjustment mechanisms 2-1, 2-3, and 2-5 on the first mounting frame 21 are matched with the observation windows 1-1, 1-2, and 1-3 at the ends of the three electrodes of the AC arc heater, respectively, so that the center point of the optical lens is located on the extension line of the central axis of the three electrodes, and the plane adjustment between optical lenses 2-1 and 2-3 and observation windows 1-1 and 1-2 forms a 60° angle, and the plane between 2-5 and 1-3 forms a 45° angle. The lens adjustment mechanism 2-10 on the second mounting frame 22 is matched with the central observation window 1-4 of the mixing chamber of the AC arc heater, so that the center point of the optical lens is located on the extension line of the central axis of the mixing chamber, and the plane between the optical lens and the observation window forms a 45° angle.

[0031] In this embodiment, lens adjustment mechanisms 2-2, 2-4, and 2-6 are matched with 2-1, 2-3, and 2-5 respectively, so that the center points of the two sets of optical lenses 2-1 and 2-2, and 2-3 and 2-4 are aligned vertically, and the center points of the two sets of optical lenses 2-5 and 2-6 are aligned horizontally. Furthermore, a 45° angle is formed between the two sets of optical lenses 2-1 and 2-2, and 2-3 and 2-4, and a 90° angle is formed between the two sets of optical lenses 2-5 and 2-6. Lens adjustment mechanisms 2-10 and 2-11 are matched so that the center points of the two sets of optical lenses 2-10 and 2-11 are aligned horizontally, and a 90° angle is formed between the two sets of optical lenses.

[0032] Example 5 like Figures 1-3As shown, the image acquisition device also includes camera mounting supports for adjusting the poses of the first camera 3-1, the second camera 3-2, the third camera 3-3, and the fourth camera 3-4. Specifically, it includes a camera mounting support 2-7 that allows the first camera 3-1 to be movable and adjustable on the first mounting frame 21, a camera mounting support 2-8 that allows the second camera 3-2 to be movable and adjustable on the first mounting frame 21, a camera mounting support 2-9 that allows the third camera 3-3 to be movable and adjustable on the first mounting frame 21, and a camera mounting support 2-12 that allows the fourth camera 3-4 to be movable and adjustable on the second mounting frame 22.

[0033] The camera mounting bracket includes: a camera sliding device A2 (e.g., a sliding sleeve structure), which can move and be fixed along the first mounting frame 21 and the second mounting frame 22; a support plate D, connected to the camera sliding device A2; and a camera support E, which can slide along the support plate D to adjust the distance between the lens and the target viewing lens. The camera mounting bracket consists of the sliding device A2, the support plate D, and the camera support E. The camera support E can slide at any position on the support plate D to adjust the distance between the camera lens and the target viewing lens, and is fixed to a certain position on the support plate D by bolts.

[0034] The first camera 3-1, the second camera 3-2, the third camera 3-3, and the fourth camera 3-4 are respectively mounted on the camera mounting brackets 2-7, 2-8, 2-9, and 2-12 in this embodiment. The center of the lens of these four cameras is aligned with the center of the optical lens of the optical adjustment mechanism 2-2, 2-4, 2-6, and 2-11, respectively. The focus is adjusted after adjusting the distance between each camera lens and the optical lens through the camera mounting bracket.

[0035] Example 6 like Figures 1-2 As shown, the image processing system 4 includes a computer device. The first camera 3-1, the second camera 3-2, the third camera 3-3, and the fourth camera 3-4 are all connected to the computer device. Any one of the first camera 3-1, the second camera 3-2, the third camera 3-3, and the fourth camera 3-4 is set as the main camera. The other three cameras are associated with and synchronized with the main camera. The computer device controls the start and stop of the main camera.

[0036] Specifically, the high-speed cameras (including the first camera 3-1, the second camera 3-2, the third camera 3-3, and the fourth camera 3-4) are started and stopped via computer control software. One camera is selected as the main camera, and the other three cameras are triggered and controlled synchronously with the main camera. The images of the arc inside the three electrodes and the arc inside the mixing chamber are processed in the same time sequence. The corresponding images from the four cameras are fused into a four-window video of the arc dynamic behavior, realizing a synchronous video display of the arc convergence process from the inside of the arc heater electrode to the mixing chamber.

[0037] In addition, four high-speed cameras are mounted on the camera mount. Any one of them is set as the main camera, and the other three high-speed cameras are associated and synchronized with the main camera. The main camera is connected to computer 4, and the start and stop of the main camera are controlled by the control program.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-optical-path observation system for the dynamic behavior of a star-shaped three-phase AC arc, characterized in that, Includes a viewfinder system, an image acquisition device, and an image processing system; The framing system is arranged in the observation window of the three electrode arms of the star-shaped three-phase AC arc heater and the mixing chamber, and sends the image of the observation window to the image acquisition device through multiple optical lenses. The image acquisition device is communicatively connected to the image processing system.

2. The star-shaped three-phase AC arc dynamic behavior multi-optical path observation system according to claim 1, characterized in that, The framing system includes a first optical path component, a second optical path component, a third optical path component, and a fourth optical path component; the image acquisition device includes a first camera, a second camera, a third camera, and a fourth camera. The first optical path component is used to send the image from the observation window of the first electrode arm of the star-shaped three-phase AC arc heater to the first camera; The second optical path assembly is used to send the image from the observation window of the second electrode arm of the star-shaped three-phase AC arc heater to the second camera; The third optical path assembly is used to send the image from the observation window of the third electrode arm of the star-shaped three-phase AC arc heater to the third camera; The fourth optical path assembly is used to send the image from the observation window of the mixing chamber of the star-shaped three-phase AC arc heater to the fourth camera.

3. The star-shaped three-phase AC arc dynamic behavior multi-optical path observation system according to claim 2, characterized in that: The first optical path assembly includes a first lens and a second lens constituting the optical path. The first lens is disposed on the observation window side of the first electrode arm of the star-shaped three-phase AC arc heater, and the second lens is disposed on the lens side of the first camera. The second optical path assembly includes a third lens and a fourth lens constituting the optical path. The third lens is disposed on one side of the observation window of the second electrode arm of the star-shaped three-phase AC arc heater, and the fourth lens is disposed on one side of the lens of the second camera. The third optical path assembly includes a fifth lens and a sixth lens constituting the optical path. The fifth lens is disposed on one side of the observation window of the third electrode arm of the star-shaped three-phase AC arc heater, and the sixth lens is disposed on one side of the lens of the third camera. The fourth optical path assembly includes a seventh lens and an eighth lens constituting the optical path. The seventh lens is disposed on one side of the observation window of the mixing chamber of the star-shaped three-phase AC arc heater, and the eighth lens is disposed on one side of the lens of the fourth camera.

4. The star-shaped three-phase AC arc dynamic behavior multi-optical path observation system according to claim 3, characterized in that: The first lens is a reflector and forms a 60° angle with the observation window of the first electrode arm; the second lens is a reflector facing the first lens and the first camera, and forms a 45° angle with the first lens and a 45° angle with the lens of the first camera. The third lens is a reflector and forms a 60° angle with the observation window of the second electrode arm; the fourth lens is a reflector facing the third lens and the second camera, and forms a 45° angle with the third lens and the lens of the second camera. The fifth lens is a reflector and forms a 45° angle with the observation window of the third electrode arm; the sixth lens is a reflector facing the fifth lens and the third camera, and forms a 90° angle with the fifth lens and a 45° angle with the lens of the third camera. The seventh lens is a reflector and forms a 45° angle with the observation window of the mixing chamber; the eighth lens is a reflector facing the seventh lens and the fourth camera, and forms a 90° angle with the seventh lens and a 45° angle with the lens of the fourth camera.

5. The star-shaped three-phase AC arc dynamic behavior multi-optical path observation system according to claim 3, characterized in that, It also includes a first mounting frame and a second mounting frame; The first mounting frame is located outside the three electrode arms and coincides with the plane containing the central axis of the electrodes. It is used to mount the first optical path assembly and the first camera, the second optical path assembly and the second camera, and the third optical path assembly and the third camera. The second mounting frame is located outside the mixing chamber and coincides with the horizontal plane of the center of the mixing chamber, and is used to mount the fourth optical path assembly and the fourth camera.

6. The star-shaped three-phase AC arc dynamic behavior multi-optical path observation system according to claim 5, characterized in that, The framing system also includes a lens adjustment mechanism for adjusting the position and orientation of the first optical path component, the second optical path component, the third optical path component, and the fourth optical path component.

7. The star-shaped three-phase AC arc dynamic behavior multi-optical path observation system according to claim 6, characterized in that, The lens adjustment mechanism includes: The lens sliding device can move and be fixed along the first mounting frame and the second mounting frame; The adjusting rod includes a fixed section and a telescopic section, the telescopic section being connected to the lens sliding device, and the fixed section being connected to the telescopic section at a variable angle; An optical lens clamp, connected at a variable angle to the fixed section of the adjusting rod, is used to mount each lens.

8. The star-shaped three-phase AC arc dynamic behavior multi-optical path observation system according to claim 5, characterized in that, The image acquisition device also includes a camera mounting bracket for adjusting the poses of the first camera, the second camera, the third camera, and the fourth camera.

9. The star-shaped three-phase AC arc dynamic behavior multi-optical path observation system according to claim 8, characterized in that, The camera mounting bracket includes: The camera sliding device can move and be fixed along the first mounting frame and the second mounting frame; A support plate is connected to the camera sliding device; The camera mount can slide along the support plate to adjust the distance between the lens and the lens element.

10. The star-shaped three-phase AC arc dynamic behavior multi-optical path observation system according to claim 2, characterized in that, The image processing system includes a computer device, and the first camera, the second camera, the third camera, and the fourth camera are all communicatively connected to the computer device. Furthermore, any one of the first camera, the second camera, the third camera, and the fourth camera is set as the main camera, and the other three cameras are associated and synchronized with the main camera. The computer device controls the start and stop of the main camera.

Images