Lightning current damage form observation system and method based on high-frequency laser

Abstract

The invention relates to a lightning current damage form observation system based on high-frequency laser, and the system comprises a computer, a combined wave generator, an oscilloscope, a high-frequency laser emission assembly, an observation cavity, and a shooting assembly, the combined wave generator is used for simulating a transient overvoltage or overcurrent phenomenon in an actual environment, generating an impact current, and generating a pulse signal; triggering a high-power high-frequency laser illumination light source and a high-speed camera by using a pulse signal; the observation cavity is located between the high-frequency laser emission assembly and the shooting assembly, and the three are located on the same central axis. The oscilloscope is used for capturing pulse signals and sending the pulse signals to the high-power high-frequency laser illumination light source and the high-speed camera so as to achieve the synchronous triggering effect, the high-speed camera is under the longest exposure condition under the corresponding frame rate, a single-needle image of the lightning current damage form is obtained, and the lightning current damage form can be obtained through multiple times of exposure shooting. Shooting of images in the dynamic development process of the lightning current damage form is achieved, and the purpose of observing the lightning current damage form is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of lightning current damage morphology observation, and in particular to a lightning current damage morphology observation system and method based on high-frequency laser. Background Art

[0002] Lightning current damage is a phenomenon that involves the physical effects of lightning and the thermodynamic properties of metals. When lightning discharges to a metal electrode, the current passing through the metal produces a significant thermal effect. The high energy density of lightning currents releases a significant amount of heat in a very short period of time, causing the temperature of the struck metal area to rise sharply. This heat exceeds the melting point of the metal, causing it to melt or even vaporize, forming a molten pool or exacerbating an existing one. Therefore, understanding the morphological characteristics and mechanisms of lightning current damage is crucial for gaining a deeper understanding of discharge mechanisms, optimizing lightning protection equipment, and selecting electrode materials.

[0003] When conducting lightning current damage morphology observation experiments, an impulse voltage is applied to the high-voltage electrode and the discharge electrode is grounded. The current passing through the discharge electrode instantly generates a large amount of heat and impact force, and this time scale is extremely fast. The speed of lightning striking the metal molten pool can generally reach 10 4 to 10 5 m / s, while the molten pool is typically small, on the order of hundreds of microns. Therefore, capturing the characteristics and mechanisms of lightning current damage morphology places stringent demands on the continuous temporal and spatial resolution of the observation system. Furthermore, when a discharge arc is generated, arc light interferes with the capture of lightning current damage morphology images. Therefore, the observation system must accurately filter out the arc light and accurately supplement the molten pool optical signal to enhance and transmit the molten pool optical signal.

[0004] Traditional observation systems are limited by the camera's image storage rate and processing performance, making it difficult for current high-speed cameras to achieve frame rates exceeding one million frames per second. Furthermore, image resolution and camera frame rate are inversely proportional, making it difficult to achieve both high temporal resolution and wide spatial coverage during high-speed schlieren image acquisition. Furthermore, synchronous triggering is a limitation of traditional observation systems, as an oscilloscope must simultaneously send pulse signals to both the high-power, high-frequency laser illumination source and the high-speed camera. Therefore, a new observation system and method are needed that can achieve both high temporal and spatial resolution and synchronize the triggering of the high-power, high-frequency laser illumination source and the high-speed camera to accurately observe the morphology of the electrode molten pool damaged by lightning current. Summary of the Invention

[0005] In order to solve the problem that it is difficult to achieve coordinated observation of the morphology of the lightning current damaged electrode molten pool with high temporal and spatial resolution and synchronous triggering of the lighting light source and the high-speed camera, which makes it difficult to capture the development image of the lightning current damaged electrode molten pool morphology and difficult to analyze its characteristics and mechanism, the primary purpose of the present invention is to provide a lightning current damage morphology observation system based on high-frequency laser, which can realize the capture of the dynamic development process image of the lightning current damage morphology, significantly improve the utilization rate of the lighting light source, and significantly enhance the sensitivity and imaging quality of the optical system.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a lightning current damage morphology observation system based on high-frequency laser, the system comprising:

[0007] A computer, using a control system, is used to control the voltage, current and discharge of the combination wave generator, set the waveform and size of the impulse voltage and current, and control the discharge trigger time;

[0008] The combined wave generator is used to simulate transient overvoltage or overcurrent phenomena in actual environments, generate impact current, and produce pulse signals. The pulse signals are used to trigger the high-power high-frequency laser lighting source in the high-frequency laser emission component and the high-speed camera in the shooting component;

[0009] Oscilloscope, used to capture the pulse signal of lightning current damaging the electrode and display the lightning current waveform, and use the single pulse signal to synchronously trigger the high-speed camera and the repetitive pulse signal to trigger the lighting source;

[0010] High-frequency laser emission components are used to generate high-output power, high-brightness, and high-penetration light with a wavelength of 810nm, the same as the wavelength of light waves from a lightning-struck metal molten pool;

[0011] An observation chamber is used to provide a closed environment, simulate the electrode discharge process of the discharge electrode under the ambient gas, and realize the observation of the morphological changes of the discharge electrode molten pool; the discharge electrode includes an upper discharge electrode and a lower discharge electrode, and a discharge electrode gap is formed between the upper discharge electrode and the lower discharge electrode;

[0012] The shooting component is used to achieve coordinated observation with high temporal and spatial resolution, capturing the morphological development image of the electrode damaged by lightning current;

[0013] The observation cavity is located between the high-frequency laser emitting component and the shooting component, and the three are located on the same central axis.

[0014] The output end of the computer is connected to the input end of the combination wave generator, the high-voltage electrode in the combination wave generator is connected to the upper discharge electrode, the ground electrode in the combination wave generator is connected to the lower discharge electrode, the ground electrode is grounded through a ground wire, and the oscilloscope is set on the ground wire through a differential probe. The output end of the oscilloscope simultaneously sends a pulse signal to the high-speed camera and the high-power high-frequency laser illumination light source in the high-frequency laser emission component.

[0015] The high-frequency laser emission component includes:

[0016] High-power high-frequency laser lighting source, used to emit high-frequency compensation laser to the discharge electrode molten pool, generating high-frequency or ultra-high-frequency pulses or pulse sequences, with extremely high monochromaticity and extremely low coherence, ensuring high image quality of the output light;

[0017] The condenser lens is used to converge the scattered light into a smaller area or in one direction, thereby achieving efficient utilization of the high-power high-frequency laser lighting source;

[0018] The high-power high-frequency laser lighting source and the focusing lens are located on the same optical path, and the distance between the high-power high-frequency laser lighting source and the focusing lens is adjusted according to the size of the focused area.

[0019] The observation cavity includes:

[0020] The observation window lens uses KBr lens to improve the sensitivity and imaging quality of the optical system;

[0021] Discharge electrodes, used to simulate different modes of discharge;

[0022] The observation window lens faces the discharge electrode gap, and the position of the discharge electrode in the observation cavity can be adjusted up and down.

[0023] The shooting component includes:

[0024] Optical filter: 810nm narrowband filter is used to filter out the lightning arc light in addition to the lightning current damage to the molten pool optical signal;

[0025] The lens group includes a telephoto lens and a short-focus lens. The telephoto lens is used to shoot distant objects, blur the background, and highlight the main body of the discharge electrode. It is suitable for capturing the morphological changes of the electrode damaged by lightning current. The short-focus lens is suitable for shooting close objects, providing wide-angle shooting, and is suitable for capturing environmental information near the discharge electrode.

[0026] A high-speed camera is used to capture the image of the morphological changes of the molten pool damaged by lightning current under the triggering of the pulse signal transmitted by the oscilloscope to obtain a single-frame schlieren image; the object distance of the high-speed camera is set to 1900 mm and the image distance is set to 49.2 mm;

[0027] The filter is mounted on a lens of a lens group, and the lens of the lens group is mounted on a high-speed camera.

[0028] The high-power high-frequency laser illumination light source generates near-infrared light, monochromatic light and incoherent light with an output power of 500W and a wavelength of 810nm.

[0029] The high-speed camera is at a shooting frame rate of maximum image resolution, and the maximum shooting frame number of the high-speed camera is 1,200,000 frames; the object distance of the high-speed camera is set to 1,900 mm, and the image distance is set to 49.2 mm.

[0030] Another object of the present invention is to provide an observation method of a lightning current damage morphology observation system based on a high-frequency laser, the method comprising the following steps in sequence:

[0031] (1) Connect the computer to the combination wave generator and test the combination wave generator;

[0032] (2) Adjust the observation chamber, assemble the KBr lens into the observation chamber, and install the experimental metal on the ground electrode. Test the sealing of the observation chamber. After the test, inject argon into the observation chamber and use a vacuum pump to keep it in a negative pressure state.

[0033] (3) Connect the combined wave generator to the oscilloscope, and connect the oscilloscope to the high-speed camera and the high-power high-frequency laser illumination light source, adjust the parameters of the high-speed camera, and adjust the parameters of the high-power high-frequency laser illumination light source;

[0034] (4) Use a computer to control the combination wave generator to generate impulse voltage or current, and release the voltage or current after setting the required voltage or current;

[0035] (5) Use an oscilloscope to capture the discharge waveform, trigger a high-power high-frequency laser illumination source and a high-speed camera, and use the high-speed camera to capture the lightning current damage morphology image;

[0036] (6) Use a computer to save lightning current damage morphology images and analyze lightning current damage morphology image data.

[0037] It can be seen from the above technical solution that the beneficial effects of the present invention are as follows: First, the present invention uses a computer to control the waveform and amplitude of the combined wave generator and generate a pulse waveform, uses an oscilloscope to capture the pulse signal, and sends a pulse signal to trigger a high-power high-frequency laser lighting source and a high-speed camera. The high-power high-frequency laser lighting source can output a near-infrared ray with an output power of 500W and a wavelength of 810nm. The focusing lens can significantly improve the utilization rate of the lighting source, and the cavity provides a sealed discharge environment with argon gas to simulate the discharge in real life. The cavity KBr lens can significantly improve the sensitivity and imaging quality of the optical system, and the shooting system 810nm narrow-band filter can significantly improve the sensitivity and imaging quality of the optical system. By filtering out the lightning arc light other than the light signal of the lightning current damage molten pool, the long-focus and short-focus lenses can be more widely used to shoot various situations; secondly, the present invention uses an oscilloscope to capture pulse signals and sends pulse signals to the high-power high-frequency laser lighting light source and the high-speed camera to achieve the effect of synchronous triggering. The frequency of the pulse signal is not lower than the maximum shooting frame rate of the high-speed camera. During shooting, the high-speed camera is in the longest exposure condition under the corresponding frame rate to obtain a single-needle image of the lightning current damage morphology. Multiple exposures are taken to realize the shooting of images of the dynamic development process of the lightning current damage morphology, breaking through the limitation that the shooting frame rate and image resolution of the high-speed camera under existing observation conditions are difficult to improve at the same time, and achieving the purpose of observing the lightning current damage morphology. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 This is a schematic diagram of the system structure of the present invention

[0039] Figure 2 Flowchart of the method of the present invention.

[0040] Figure 3 Synchronous timing diagram of the lightning current observation system of the present invention;

[0041] Figure 4 The lightning current damage morphology image captured by the present invention. DETAILED DESCRIPTION

[0042] like Figure 1 As shown, a lightning current damage morphology observation system based on high-frequency laser includes:

[0043] A computer, using a control system, is used to control the voltage, current and discharge of the combination wave generator, set the waveform and size of the impulse voltage and current, and control the discharge trigger time;

[0044] The combination wave generator is used to simulate transient overvoltage or overcurrent phenomena in the actual environment, generate impact current, and generate pulse signals. The pulse signals are used to trigger the high-power high-frequency laser lighting light source in the high-frequency laser emission component and the high-speed camera in the shooting component; generate 1.2 / 50us voltage waveform and 8 / 20us current waveform; can generate 0-200kA200C impact current; the lightning current amplitude generated by the combination wave generator is 200KA. The lightning current with an amplitude of 200KA is an extremely high lightning current, which is fully capable of simulating the lightning current received by the equipment when it is struck by lightning and meets laboratory needs.

[0045] Oscilloscope, used to capture the pulse signal of lightning current damaging the electrode and display the lightning current waveform, and use the single pulse signal to synchronously trigger the high-speed camera and the repetitive pulse signal to trigger the lighting source;

[0046] High-frequency laser emission components are used to generate high-output power, high-brightness, and high-penetration light. The wavelength of the light is 810nm, the same as the wavelength of the light wave of the metal molten pool struck by lightning. This can significantly improve the light wave of the molten pool and is perfectly compatible with high-speed cameras.

[0047] The observation chamber is used to provide a closed environment to simulate the electrode discharge process of the discharge electrode under the ambient gas and to observe the changes in the morphology of the discharge electrode molten pool; the discharge electrode includes an upper discharge electrode and a lower discharge electrode, and the morphology can be flexibly customized according to application requirements, such as rod-rod, rod-plate, and plate-plate electrodes for simulating different modes of discharge, and there is a discharge electrode gap between the upper discharge electrode and the lower discharge electrode;

[0048] The shooting component is used to achieve coordinated observation with high temporal and spatial resolution, capturing the morphological development image of the electrode damaged by lightning current;

[0049] The observation cavity is located between the high-frequency laser emitting component and the shooting component, and the three are located on the same central axis.

[0050] The output end of the computer is connected to the input end of the combination wave generator, the high-voltage electrode in the combination wave generator is connected to the upper discharge electrode, the ground electrode in the combination wave generator is connected to the lower discharge electrode, the ground electrode is grounded through a ground wire, and the oscilloscope is set on the ground wire through a differential probe. The output end of the oscilloscope simultaneously sends a pulse signal to the high-speed camera and the high-power high-frequency laser illumination light source in the high-frequency laser emission component.

[0051] The high-frequency laser emission component includes:

[0052] High-power high-frequency laser lighting source, used to emit high-frequency compensation laser to the discharge electrode molten pool, generating high-frequency or ultra-high-frequency pulses or pulse sequences, with extremely high monochromaticity and extremely low coherence, ensuring high image quality of the output light;

[0053] The condenser lens is used to converge the scattered light into a smaller area or in one direction, thereby achieving efficient utilization of the high-power high-frequency laser lighting source;

[0054] The high-power high-frequency laser lighting source and the focusing lens are located on the same optical path, ensuring that the laser can be efficiently and accurately focused on the gap area. The distance between the high-power high-frequency laser lighting source and the focusing lens is adjusted according to the size of the focused area.

[0055] The observation cavity includes:

[0056] The observation window lens uses KBr lens to significantly improve the sensitivity and imaging quality of the optical system. With the high transmittance of KBr material and the excellent physical and chemical properties of the lens, it can better achieve cavity sealing and durability.

[0057] Discharge electrodes, used to simulate different modes of discharge;

[0058] The observation window lens faces the gap between the discharge electrodes to ensure that the light path is unobstructed and avoid signal attenuation; the position of the discharge electrode in the observation cavity can be adjusted up and down.

[0059] The shooting component includes:

[0060] The filter uses an 810nm narrowband filter to filter out lightning arc light in addition to the light signal of the lightning current damaging the molten pool. It has high transmittance for the light wave of the molten metal pool, which can improve the signal-to-noise ratio and ensure the purity of the light signal passing through. Lightning current damage experiments will generate a large amount of lightning arc light. This filter is used to filter out the lightning arc light in addition to the light signal of the lightning current damaging the molten pool, and only allows the light wave signal of the molten metal pool to pass through at 810nm (±20nm).

[0061] The lens group includes a telephoto lens and a short-focus lens. The telephoto lens is used to shoot distant objects, blur the background, and highlight the main body of the discharge electrode. It is suitable for capturing the morphological changes of the electrode damaged by lightning current. The short-focus lens is suitable for shooting close objects, providing wide-angle shooting, and is suitable for capturing environmental information near the discharge electrode.

[0062] A high-speed camera is used to capture the image of the morphological changes of the molten pool damaged by lightning current under the triggering of the pulse signal transmitted by the oscilloscope to obtain a single-frame schlieren image; the object distance of the high-speed camera is set to 1900 mm and the image distance is set to 49.2 mm;

[0063] The filter is mounted on a lens of a lens group, and the lens of the lens group is mounted on a high-speed camera.

[0064] The high-power high-frequency laser illumination light source generates near-infrared light, monochromatic light, and incoherent light with an output power of 500W and a wavelength of 810nm, suitable for high-quality imaging. One control unit can drive multiple laser units and synchronize multiple high-speed cameras.

[0065] The high-speed camera is at a shooting frame rate of maximum image resolution, and the maximum shooting frame number of the high-speed camera is 1,200,000 frames; the object distance of the high-speed camera is set to 1,900 mm, and the image distance is set to 49.2 mm.

[0066] like Figure 2 As shown, the method includes the following steps in order:

[0067] (1) Connect the computer to the combination wave generator and test the combination wave generator;

[0068] (2) Adjust the observation chamber, assemble the KBr lens into the observation chamber, and install the experimental metal on the ground electrode. Test the sealing of the observation chamber. After the test, inject argon into the observation chamber and use a vacuum pump to keep it in a negative pressure state.

[0069] (3) Connect the combined wave generator to the oscilloscope, and connect the oscilloscope to the high-speed camera and the high-power high-frequency laser illumination light source, adjust the parameters of the high-speed camera, and adjust the parameters of the high-power high-frequency laser illumination light source;

[0070] (4) Use a computer to control the combination wave generator to generate impulse voltage or current, and release the voltage or current after setting the required voltage or current;

[0071] (5) Use an oscilloscope to capture the discharge waveform, trigger a high-power high-frequency laser illumination source and a high-speed camera, and use the high-speed camera to capture the lightning current damage morphology image;

[0072] (6) Use a computer to save lightning current damage morphology images and analyze lightning current damage morphology image data.

[0073] like Figure 3 As shown, (a) is the voltage waveform diagram, (b) is the waveform signal received by the oscilloscope, (c) is the oscilloscope sending a trigger signal to the high-speed camera, as well as the exposure clock signal of the high-speed camera, and (d) is the high-power high-frequency laser lighting light source receiving the trigger signal of the oscilloscope.

[0074] like Figure 4 As shown in FIG, this figure is a frame of lightning current damage morphology image captured by this system.

[0075] In summary, the present invention uses a computer to control the waveform and amplitude of the combined wave generator and generate a pulse waveform, uses an oscilloscope to capture the pulse signal, and sends the pulse signal to trigger the high-power high-frequency laser lighting source and the high-speed camera. The high-power high-frequency laser lighting source can output near-infrared rays with an output power of 500W and a wavelength of 810nm. The focusing lens can significantly improve the utilization rate of the lighting source. The cavity is used to provide a sealed discharge environment with argon gas to simulate the discharge in real life. The cavity KBr lens can significantly improve the sensitivity and imaging quality of the optical system. The 810nm narrow-band filter of the shooting system can significantly filter out the lightning current damage to the melt. Lightning arc light other than pool light signals, long-focus and short-focus lenses can be more widely used to shoot various situations; the present invention uses an oscilloscope to capture pulse signals and sends pulse signals to a high-power high-frequency laser lighting source and a high-speed camera to achieve a synchronous triggering effect. The pulse signal frequency is not lower than the maximum shooting frame rate of the high-speed camera. During shooting, the high-speed camera is in the longest exposure condition under the corresponding frame rate to obtain a single-needle image of the lightning current damage morphology. Multiple exposures are taken to achieve the capture of images of the dynamic development process of the lightning current damage morphology, breaking through the limitation that the shooting frame rate and image resolution of the high-speed camera under existing observation conditions are difficult to improve at the same time, and achieving the purpose of observing the lightning current damage morphology.

[0076] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A lightning current damage morphology observation system based on high-frequency laser, characterized by: The system includes: A computer, using a control system, is used to control the voltage, current and discharge of the combination wave generator, set the waveform and size of the impulse voltage and current, and control the discharge trigger time; The combined wave generator is used to simulate transient overvoltage or overcurrent phenomena in actual environments, generate impact current, and produce pulse signals. The pulse signals are used to trigger the high-power high-frequency laser lighting source in the high-frequency laser emission component and the high-speed camera in the shooting component; Oscilloscope, used to capture the pulse signal of lightning current damaging the electrode and display the lightning current waveform, and use the single pulse signal to synchronously trigger the high-speed camera and the repetitive pulse signal to trigger the lighting source; High-frequency laser emission components are used to generate high-output power, high-brightness, and high-penetration light with a wavelength of 810nm, the same as the wavelength of light waves from a lightning-struck metal molten pool; An observation chamber is used to provide a closed environment, simulate the electrode discharge process of the discharge electrode under the ambient gas, and realize the observation of the morphological changes of the discharge electrode molten pool; the discharge electrode includes an upper discharge electrode and a lower discharge electrode, and a discharge electrode gap is formed between the upper discharge electrode and the lower discharge electrode; The shooting component is used to achieve coordinated observation with high temporal and spatial resolution, capturing the morphological development image of the electrode damaged by lightning current; The observation cavity is located between the high-frequency laser emitting component and the shooting component, and the three are located on the same central axis.

2. The high-frequency laser-based lightning current damage morphology observation system according to claim 1, characterized in that: The output end of the computer is connected to the input end of the combination wave generator, the high-voltage electrode in the combination wave generator is connected to the upper discharge electrode, the ground electrode in the combination wave generator is connected to the lower discharge electrode, the ground electrode is grounded through a ground wire, and the oscilloscope is set on the ground wire through a differential probe. The output end of the oscilloscope simultaneously sends a pulse signal to the high-speed camera and the high-power high-frequency laser illumination light source in the high-frequency laser emission component.

3. The lightning current damage morphology observation system based on high-frequency laser according to claim 1 is characterized in that: The high-frequency laser emission component includes: High-power high-frequency laser lighting source, used to emit high-frequency compensation laser to the discharge electrode molten pool, generating high-frequency or ultra-high-frequency pulses or pulse sequences, with extremely high monochromaticity and extremely low coherence, ensuring high image quality of the output light; The condenser lens is used to converge the scattered light into a smaller area or in one direction, thereby achieving efficient utilization of the high-power high-frequency laser lighting source; The high-power high-frequency laser lighting source and the focusing lens are located on the same optical path, and the distance between the high-power high-frequency laser lighting source and the focusing lens is adjusted according to the size of the focused area.

4. The lightning current damage morphology observation system based on high-frequency laser according to claim 1, characterized in that: The observation cavity includes: The observation window lens uses KBr lens to improve the sensitivity and imaging quality of the optical system; Discharge electrodes, used to simulate different modes of discharge; The observation window lens faces the discharge electrode gap, and the position of the discharge electrode in the observation cavity can be adjusted up and down.

5. The lightning current damage morphology observation system based on high-frequency laser according to claim 1 is characterized in that: The shooting component includes: Optical filter: 810nm narrowband filter is used to filter out the lightning arc light in addition to the lightning current damage to the molten pool optical signal; The lens group includes a telephoto lens and a short-focus lens. The telephoto lens is used to shoot distant objects, blur the background, and highlight the main body of the discharge electrode. It is suitable for capturing the morphological changes of the electrode damaged by lightning current. The short-focus lens is suitable for shooting close objects, providing wide-angle shooting, and is suitable for capturing environmental information near the discharge electrode. A high-speed camera is used to capture the image of the morphological changes of the molten pool damaged by lightning current under the triggering of the pulse signal transmitted by the oscilloscope to obtain a single-frame schlieren image; the object distance of the high-speed camera is set to 1900 mm and the image distance is set to 49.2 mm; The filter is mounted on a lens of a lens group, and the lens of the lens group is mounted on a high-speed camera.

6. The lightning current damage morphology observation system based on high-frequency laser according to claim 3, characterized in that: The high-power high-frequency laser illumination light source generates near-infrared light, monochromatic light and incoherent light with an output power of 500W and a wavelength of 810nm.

7. The lightning current damage morphology observation system based on high-frequency laser according to claim 5, characterized in that: The high-speed camera is at a shooting frame rate of maximum image resolution, and the maximum shooting frame number of the high-speed camera is 1,200,000 frames; the object distance of the high-speed camera is set to 1,900 mm, and the image distance is set to 49.2 mm.

8. The observation method of the lightning current damage morphology observation system based on high-frequency laser according to any one of claims 1 to 7, characterized in that: The method comprises the following steps in sequence: (1) Connect the computer to the combination wave generator and test the combination wave generator; (2) Adjust the observation chamber, assemble the KBr lens into the observation chamber, and install the experimental metal on the ground electrode. Test the sealing of the observation chamber. After the test, inject argon into the observation chamber and use a vacuum pump to keep it in a negative pressure state. (3) Connect the combined wave generator to the oscilloscope, and connect the oscilloscope to the high-speed camera and the high-power high-frequency laser illumination light source, adjust the parameters of the high-speed camera, and adjust the parameters of the high-power high-frequency laser illumination light source; (4) Use a computer to control the combination wave generator to generate impulse voltage or current, and release the voltage or current after setting the required voltage or current; (5) Use an oscilloscope to capture the discharge waveform, trigger a high-power high-frequency laser illumination source and a high-speed camera, and use the high-speed camera to capture the lightning current damage morphology image; (6) Use a computer to save lightning current damage morphology images and analyze lightning current damage morphology image data.

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